7 Best APIs for Phone Number Validation in Nigeria

Veriphone is a phone number validation and carrier lookup API that provides real-time phone intelligence for developers and businesses across 249 countries and territories. Built for simplicity and speed, Veriphone delivers carrier name, line type, number format validation, and country/region identification in a single API call with millisecond latency. The platform's standout pricing model sets it apart from competitors: pay-as-you-go credits never expire, eliminating the wastage risk of monthly subscription plans with unused quota. The free tier includes 1,000 real validations per month without requiring a credit card. ## What the API Does Veriphone validates phone numbers and enriches them with carrier and line type metadata. A single API call returns: - **Validation status**: Whether the phone number is valid and likely active. - **E.164 formatted number**: Standardizes any regional format to international E.164 format (e.g., `+2348012345678` for Nigerian numbers). - **Country**: The country associated with the number, including Nigeria (+234). - **Carrier**: The mobile network operator (e.g., MTN Nigeria, Airtel Nigeria, Globacom, 9mobile). - **Line type**: Classifies the number as mobile, landline, or VoIP. - **Region**: Sub-national region associated with the number prefix where available. Beyond real-time API queries, Veriphone supports bulk validation via CSV upload — allowing teams to clean entire contact databases without writing API integration code. ## How Developers Use It Integration is a simple GET request: ``` GET https://api.veriphone.io/v2/verify?phone=+2348012345678&key=YOUR_API_KEY ``` The API returns a JSON response with all available metadata. The API key can be passed as a query parameter or in the `x-veriphone-key` header. No SDK is required, though client libraries are available for popular languages. ## Pricing & Fees Veriphone's pricing is developer-friendly and flexible: - **Free Plan**: 1,000 validations per month, no credit card required. Ideal for development and small-scale use. - **Pay-as-you-go**: $0.20 per 1,000 queries (i.e., $0.0002 per validation). Credits purchased are permanent — they never expire regardless of when you use them. - **Subscription Plans**: Monthly plans with lower per-validation rates for consistent usage volumes. The non-expiring credit model is particularly useful for Nigerian projects with unpredictable verification volumes — you buy credits when needed and use them at any pace. ## Authentication Veriphone uses API key authentication. The key is passed as a query parameter (`?key=YOUR_API_KEY`) or as an HTTP header (`x-veriphone-key: YOUR_API_KEY`). API keys are obtained immediately after registration at veriphone.io. ## Rate Limits The free plan allows 1,000 validations per month. Paid plans scale based on credits purchased. No specific per-second rate limit is documented — contact Veriphone for high-frequency use case limits. ## Compliance & Regulations Veriphone is GDPR compliant. The platform operates servers within the EU and automatically deletes submitted phone numbers after validation — no personal data is retained. This data minimization approach is beneficial for Nigerian developers handling user phone numbers under NDPR (Nigeria Data Protection Regulation), which requires appropriate safeguards for personal data. ## Challenges & Gotchas for Nigerian Developers 1. **No SIM Swap detection**: Veriphone does not offer SIM Swap detection — use Twilio Lookup if this signal is needed for fraud prevention. 2. **Carrier data accuracy**: Carrier information can become outdated due to number portability (when a user switches carrier but keeps the same number). Results reflect the number's original carrier assignment, not necessarily the current carrier after port. 3. **Line type for Nigerian numbers**: Nigerian VoIP numbers may not always be classified as VoIP — confirm accuracy for your specific fraud prevention use case before full deployment. 4. **No OTP functionality**: Veriphone validates numbers but does not send OTP codes. Pair with Twilio Verify or a Nigerian SMS gateway for OTP delivery. ## Company Background Veriphone is an independent phone validation service focused on providing simple, affordable, and accurate phone intelligence. The platform positions itself explicitly as a faster and cheaper alternative to Twilio Lookup and Numverify for developers who need carrier and line type data without the complexity of a full communications platform. ## Frequently Asked Questions **Q: Are Nigerian phone numbers (+234) supported?** A: Yes. Nigeria (+234) is included in Veriphone's 249-country coverage. Nigerian carrier identification (MTN, Airtel, Glo, 9mobile) and line type detection are available. **Q: Do credits expire?** A: No. Pay-as-you-go credits purchased on Veriphone never expire. This is one of the platform's key differentiators. **Q: Can I validate Nigerian numbers in bulk?** A: Yes. Veriphone supports bulk validation via CSV file upload from the dashboard without requiring API integration. **Q: Is a credit card required for the free tier?** A: No. The free 1,000 validations/month plan activates immediately after email registration with no payment required.

Abstract API Phone Validation is a REST API that validates phone numbers and returns carrier intelligence, line type classification, geographic data, and fraud signals for numbers across 190+ countries and territories. Part of Abstract API's broader suite of data validation APIs (email, IP, VAT, and more), the Phone Validation API is accessible under the same API key used for all Abstract API products — reducing credential management overhead for teams already using Abstract APIs for other validation tasks. The API maintains a large and frequently updated database of phone numbers, carriers, and number types including mobile, landline, VoIP, and disposable numbers — making it useful not just for formatting validation but for fraud detection during user onboarding. ## What the API Does Submitting a phone number to Abstract's validation endpoint returns: - **Validity**: Whether the number is valid and properly formatted. - **Format**: E.164 international format and local format. - **Country**: Country name and ISO code (NG for Nigeria). - **Location**: Regional or city-level data where available. - **Carrier**: Mobile network operator name. - **Line type**: Mobile, landline, VoIP, toll-free, or unknown. - **Is disposable**: Flag for disposable/temporary number services. For Nigerian numbers, this returns the carrier (MTN Nigeria, Airtel Nigeria, Globacom, or 9mobile), the line type, and the country/region data associated with the number prefix. ## How Developers Use It Simple GET request: `GET https://phonevalidation.abstractapi.com/v1/?api_key=YOUR_KEY&phone=2348012345678`. The `api_key` is passed as a query parameter. The phone number can be provided with or without country code. Response is a JSON object returned immediately. ## Pricing & Fees Abstract API Phone Validation requires a paid plan for production use: - **Starter**: $19/month — 1,000 API calls, 3 requests/second. - **Basic**: $39/month — 25,000 calls, 5 req/sec. - **Standard**: $69/month — 50,000 calls, 10 req/sec, multiple API keys. - **Business**: $99/month — 100,000 calls, 20 req/sec. - **Professional**: $199/month — 250,000 calls. - **Growth**: $499/month — 650,000 calls. A free trial is available on signup for initial testing. ## Authentication API key passed as a URL query parameter (`api_key=YOUR_KEY`) on every request. The same API key unlocks all Abstract API products under one account. ## Rate Limits Rate limits are per-plan: 3 req/sec on Starter, scaling to 100 req/sec on Growth. Requests exceeding the per-second limit are queued or rejected depending on plan settings. ## Compliance Abstract API processes phone numbers for validation purposes under GDPR-compliant data handling policies. Numbers are not stored for marketing or secondary use beyond the immediate validation request. ## Challenges & Gotchas for Nigerian Developers 1. **No free tier**: Unlike some competitors, Abstract API Phone Validation requires a paid plan for sustained use. The Starter plan at $19/month may feel expensive for low-volume Nigerian startups. 2. **No SIM Swap detection**: Abstract API does not provide SIM Swap signals — use Twilio Lookup for this capability. 3. **Carrier accuracy with number portability**: As with all carrier lookup services, Nigerian number portability (MNP) can cause carrier misidentification after a user switches networks. 4. **USD billing**: Abstract API charges in USD. Nigerian developers need a USD-capable payment method. 5. **Rate limits matter**: The 3 req/sec limit on the Starter plan can be a bottleneck if your registration flow triggers multiple validation calls simultaneously. ## Company Background Abstract API is a San Francisco-based API company offering a suite of simple, developer-focused data validation and enrichment APIs. The phone validation product is one of several offerings, alongside email verification, IP geolocation, VAT validation, and more. All products are accessible under a single account with a unified API key. ## Frequently Asked Questions **Q: Does Abstract API support Nigerian phone numbers (+234)?** A: Yes. Nigeria is included in the 190+ country coverage with carrier and line type identification. **Q: Is there a free tier?** A: A free trial is available on signup for initial testing. Sustained production use requires a paid plan starting at $19/month. **Q: Can I use one API key for phone, email, and IP validation?** A: Yes. A single Abstract API account key provides access to all Abstract API products including phone, email, IP, and VAT validation.

NumlookupAPI is a phone number lookup and validation API providing real-time carrier identification, line type detection, geographic location data, and number format normalization for global phone numbers including Nigerian (+234) numbers. Operated by EverAPI (everapihq), the platform offers a developer-friendly integration path with a free trial requiring no credit card, paid plans from $9.99/month, and a 99.99% uptime SLA on all paid tiers. The API is designed for businesses that need to validate phone numbers at point of entry, enrich CRM contact data, or screen registrations for invalid or suspicious numbers — without the complexity of a full communications platform. ## What the API Does A single NumlookupAPI call accepts a phone number and returns: - **Validity**: Whether the number is a valid, recognized phone number. - **Number (E.164)**: The number in international E.164 format. - **Carrier**: The mobile network operator (e.g., MTN Nigeria, Airtel Nigeria, Globacom, 9mobile). - **Line type**: Mobile, landline, VoIP, or unknown. - **Location**: Country and sub-national region associated with the number prefix. - **Country code**: ISO 2-letter country code (NG for Nigerian numbers). The API integrates with CRM systems, marketing platforms, and custom applications for automated phone number quality management. ## How Developers Use It GET request to the NumlookupAPI endpoint with the phone number and API key. The response is a JSON object with all available metadata. SDKs and client libraries are available for popular languages through the GitHub repository (everapihq/numlookupapi). Integration is straightforward and can be completed in under an hour. ## Pricing & Fees - **Free trial**: Available with no credit card required for initial testing. - **Paid plans**: Start at $9.99/month providing 7,000 API requests per month. - **Custom plans**: Available for businesses requiring more than 300,000 requests per month. - All paid plans include unlimited API connections (no concurrent request limit) and the 99.99% uptime guarantee. ## Authentication API key authentication. The key is passed as a parameter in the API request. Keys are issued immediately after registration. ## Rate Limits Rate limits are based on monthly request quotas per plan tier. Paid plans come with unlimited concurrent API connections — requests are processed without queuing. Monthly quotas reset each billing cycle. ## Compliance NumlookupAPI processes phone numbers for validation and lookup purposes. Data handling policies are consistent with standard API service agreements. For Nigerian deployments, the carrier and format data returned supports phone number verification as part of broader user onboarding flows. ## Challenges & Gotchas for Nigerian Developers 1. **No SIM Swap detection**: NumlookupAPI provides carrier and line type data but does not offer SIM Swap detection for fraud prevention. Use Twilio Lookup for SIM Swap signals. 2. **Carrier accuracy with MNP**: Nigerian mobile number portability can cause carrier misidentification after a user switches networks. The API reflects original carrier assignment. 3. **7,000 requests at $9.99**: This is a reasonable starting volume but will be exhausted quickly for apps with active daily registrations. Plan your tier based on expected daily validation volume. 4. **USD billing**: NumlookupAPI charges in USD. Nigerian developers need a USD-capable payment method. 5. **Limited documentation depth**: As a smaller API provider, documentation and community support resources are more limited than Twilio or Abstract API. ## Company Background NumlookupAPI is operated by EverAPI (everapihq), a developer-focused API company providing a portfolio of data enrichment and validation APIs. The platform is available as an open-source client library on GitHub and through the Rapid API marketplace in addition to the main website. ## Frequently Asked Questions **Q: Does NumlookupAPI support Nigerian phone numbers?** A: Yes. Nigerian numbers (+234) are supported with carrier identification for MTN, Airtel, Glo, and 9mobile. **Q: Is a credit card required to try the API?** A: No. A free trial is available without credit card details. **Q: What is the uptime guarantee?** A: Paid plans include a 99.99% uptime SLA over the trailing 12-month period. **Q: How many requests does the entry-level plan include?** A: The $9.99/month plan includes 7,000 API requests per month.

BigDataCloud is a multi-product API platform that delivers several distinct data services under a single developer account: reverse geocoding, IP geolocation, client-side geolocation, email validation, and phone number validation. What makes BigDataCloud stand out among competing services is its no-frustrating-rate-limits philosophy — the free tiers are genuinely generous, and the platform avoids the aggressive throttling that makes many competing free-tier APIs impractical for real applications. **What BigDataCloud Offers** BigDataCloud is not a single API but a collection of related APIs, all accessible with a single API key from bigdatacloud.com: **1. Reverse Geocoding API** Converts latitude/longitude coordinates into human-readable address components. Given a GPS coordinate (e.g., 6.5244, 3.3792 for Lagos), the API returns the street address, neighborhood, local government area (LGA), state, country, and postal code. This is essential for mobile apps that capture GPS coordinates and need to display the user's address in plain language. **2. IP Geolocation API** Converts an IP address into location data: country, region, city, latitude, longitude, timezone, currency, ISP, ASN, and connection type. The free tier offers 10,000 requests per month — significantly more generous than many competitors. A single API key can query any IPv4 or IPv6 address. **3. Client-Side Geolocation API** A unique offering: a JavaScript snippet that can be embedded directly into a web page and called from the browser without proxying through your server. This eliminates a round-trip and is useful when you need to geolocate the current user without exposing a backend API key. The endpoint at https://api.bigdatacloud.net/data/client-ip-geolocation requires no authentication key and can be called directly from client-side JavaScript. **4. Email Validation API** Validates email addresses for deliverability without sending an actual email. Returns syntax validity, domain validity, MX record existence, disposable email detection, and role account detection (e.g., admin@, info@). Reducing fake or invalid email signups improves deliverability scores and lowers bounce rates. **5. Phone Number Validation API** Validates and parses phone numbers internationally, returning the country code, local number format, phone type (mobile/fixed), and carrier information where available. For Nigerian numbers, it correctly parses MTN, Airtel, Glo, and 9mobile prefixes. **How Developers Use BigDataCloud** Authentication uses a query parameter API key for most endpoints. The IP geolocation endpoint looks like this: GET https://api.bigdatacloud.net/data/ip-geolocation?ip=197.210.65.1&key=YOUR_KEY For reverse geocoding: GET https://api.bigdatacloud.net/data/reverse-geocode?latitude=6.5244&longitude=3.3792&localityLanguage=en&key=YOUR_KEY The client-side version requires no server key — call it directly from the browser using a standard fetch() call with no API key needed. All responses are JSON. The API is RESTful, stateless, and compatible with any language or framework. SDK support includes official Node.js and Python packages. **Pricing** BigDataCloud operates on a freemium model: - **IP Geolocation**: 10,000 free requests/month. Paid plans for higher volumes. - **Reverse Geocoding**: Tiered pricing per request volume. Free tier available for low-volume testing. - **Email Validation**: Free tier for testing; paid plans for production volumes. - **Phone Validation**: Free tier for testing; paid plans for production volumes. - **Client-Side Geolocation**: Free for direct browser calls (no server-side quota used). The key differentiator is that BigDataCloud does not throttle free requests per second — you can use your monthly allowance whenever you need it without hitting per-second rate limits. **Nigerian Coverage** BigDataCloud's databases cover Nigeria comprehensively: - All 36 states and FCT (Federal Capital Territory, Abuja) are recognized - Major cities: Lagos, Abuja, Kano, Ibadan, Port Harcourt, Benin City, Kaduna, Onitsha, Warri, Aba - Local Government Area (LGA) level data available through reverse geocoding - Nigerian ISPs recognized: MTN Nigeria, Airtel Nigeria, Glo, 9mobile, Spectranet, Swift Networks - Nigerian phone prefixes for all four major carriers parsed correctly **Reverse Geocoding for Nigerian Addresses** In Nigeria, address standardization is a major challenge. Many streets lack formal names, areas are identified by landmarks, and postal codes are incomplete or inconsistently used. BigDataCloud's reverse geocoding leverages OpenStreetMap data, which has strong Nigerian community contributions especially for Lagos, Abuja, and other major urban centers. This makes it practical for apps where users share GPS coordinates rather than typing full addresses. For delivery apps, ride-sharing platforms, field-force management tools, and logistics companies operating in Nigeria, converting driver/customer GPS coordinates to readable address labels is a core requirement. BigDataCloud's reverse geocoding handles this at minimal cost. **Email Validation in Nigerian Context** Email deliverability is a significant issue for Nigerian apps. Common problems include: - Users entering fake emails to avoid marketing - Users entering typoed email addresses (gmail.com misspelled) - Disposable email services used to bypass verification - Role accounts (info@, admin@) that do not belong to real individuals BigDataCloud's email validation catches all of these at the point of entry, before any welcome email is sent — reducing bounce rates and improving list quality for Nigerian businesses running email campaigns. **Phone Validation for Nigerian OTP Flows** Nigerian phone number validation is particularly important because: 1. WhatsApp and SMS OTP are the primary verification methods in Nigeria 2. Nigerian numbers follow specific prefix patterns by carrier 3. Users sometimes enter numbers with/without country code inconsistently (08012345678 vs +2348012345678 vs 2348012345678) BigDataCloud's phone validation normalizes these formats and confirms the number is a valid Nigerian mobile number, preventing failed OTP sends to invalid numbers. **Compliance and Data Privacy** Developers using BigDataCloud for email and phone validation should be aware that collected contact data may be subject to Nigeria's NDPR (Nigeria Data Protection Regulation). Validation API calls involve transmitting user-provided data to third-party servers, which should be disclosed in the app's privacy policy. BigDataCloud processes this data only for the purpose of validation and does not retain or resell contact data. **Company Background** BigDataCloud is an Australian-based data intelligence company focused on providing developer-friendly APIs for location intelligence and data validation. The company has built a reputation for transparent pricing, reliable uptime, and genuine free tiers — positioning itself as a developer-first alternative to overpriced enterprise solutions. Their infrastructure supports global coverage including full African continent support. **Alternatives** For reverse geocoding: Nominatim (free, open-source, OpenStreetMap-based), Google Maps Geocoding API (paid, highly accurate), HERE Geocoding API. For IP geolocation: IPinfo, IPstack, IP-API. BigDataCloud's advantage is offering all these capabilities under one platform at minimal cost — reducing the number of third-party integrations a developer needs to manage. **Frequently Asked Questions** *Can I use BigDataCloud on the front end without exposing my API key?* Yes — the client-side geolocation endpoint requires no API key and can be called directly from a browser. *How accurate is reverse geocoding for rural Nigerian areas?* Accuracy is best in major cities (Lagos, Abuja). Rural areas may return state/LGA level data without street-level detail. *Does the phone validation API know Nigerian carrier prefixes?* Yes, it correctly identifies MTN, Airtel, Glo, and 9mobile from their respective Nigerian prefixes. *Is there a bulk validation option?* Bulk email validation is available on paid plans. Individual lookups are fine for real-time validation at signup. BigDataCloud is an excellent one-stop platform for Nigerian developers who need reverse geocoding, IP detection, and data validation capabilities without paying enterprise prices or dealing with aggressive rate limits.

Numverify is a REST JSON API for international phone number validation and lookup covering 232 countries and territories including Nigeria. Operated by APILayer (apilayer.com), the API provides phone number validity checking, carrier identification, line type classification, and geographic location data in a single lightweight call. With a free tier of 100 monthly requests and paid plans from $9.99/month, Numverify suits developers at all scales needing affordable phone validation without a full communications platform. ## What the API Does Numverify accepts a phone number and returns a JSON object with: validity status, E.164 international format, local format, country prefix (+234 for Nigeria), country code (NG), country name, sub-national location, carrier name (MTN Nigeria, Airtel Nigeria, Globacom, 9mobile), and line type (mobile, landline, or special). All fields are returned in a single API call with no additional round trips. ## How Developers Use It A simple GET request with no SDK required: `GET http://apilayer.net/api/validate?access_key=YOUR_KEY&number=2348012345678&country_code=NG`. The access_key is passed as a query parameter. HTTPS requires a paid plan — the free tier is HTTP-only. Response is a JSON object with all available metadata returned immediately. ## Pricing & Fees Free plan: 100 requests/month, no credit card. Paid plans start at $9.99/month with higher monthly request limits. Annual billing saves up to 15%. All paid plans include 256-bit HTTPS encryption. ## Authentication API access key passed as a URL query parameter (`access_key=YOUR_KEY`). Keys are issued immediately after account registration at numverify.com. ## Rate Limits Free: 100 requests/month. Paid plans provide higher monthly limits based on the tier purchased. Requests above the monthly quota return an error response. ## Compliance Operated by APILayer under GDPR-compliant data handling. Phone numbers submitted are not stored beyond request processing time. For Nigerian deployments, carrier-level data supports phone number verification as part of KYC flows, compatible with CBN identity confirmation requirements. ## Challenges & Gotchas for Nigerian Developers 1. **HTTPS on paid plans only**: Free tier is HTTP-only — never use it in production with real user data. Upgrade before going live. 2. **No SIM Swap detection**: Numverify validates number metadata but cannot detect recent SIM changes — use Twilio Lookup for SIM Swap signals. 3. **Number portability gap**: Due to mobile number portability (MNP) in Nigeria, a number may have migrated to a different carrier than Numverify reports — the API reflects the original carrier assignment. 4. **100/month is minimal**: Any real app will exhaust the free quota quickly. Budget a paid plan for production use. 5. **No bulk endpoint**: One number per request — build batching logic on your own side for bulk validation. ## Company Background Numverify is a product of APILayer, a Vienna-based API marketplace founded in 2012. APILayer also operates Fixer (forex rates), Mailboxlayer (email validation), and several other developer-focused data APIs. The Numverify API is also available as an open-source library on GitHub (apilayer/numverify-API) for self-hosted deployments. ## Frequently Asked Questions **Q: Does Numverify support Nigerian numbers (+234)?** A: Yes. Nigeria is included in the 232-country coverage with carrier identification for MTN, Airtel, Glo, and 9mobile. **Q: Is HTTPS available on the free plan?** A: No. Upgrade to a paid plan before using in production. **Q: What is the difference between Numverify and Twilio Lookup?** A: Twilio Lookup charges per query ($0.005) with no subscription and adds SIM Swap detection. Numverify uses monthly subscription tiers without per-query charges, making it cheaper at consistent high volumes. Numverify is simpler to integrate but lacks real-time fraud signals. **Q: Can I validate in bulk?** A: No bulk endpoint — validate one number per request and parallelize on your side.