1 Best APIs for Carrier detection in Nigeria

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.