numlookupapi.com review
A low-cost API for developers needing validation and phone-number enrichment.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
numlookupapi.com is a JSON REST API for validating and enriching phone numbers. It suits developers and businesses that need to check validity and retrieve phone-number details inside applications. The API returns validity status, formatting, country, location, carrier, and line-type information, including mobile and landline classifications. It is available through API and web interfaces, with API-key authentication through a query parameter or request header.
Pricing is structured for small projects through larger request volumes. The Free plan costs $0 per month and includes 100 requests, one API key, and 10 requests per minute. Basic costs $9.99 per month for 5,000 requests, one API key, no rate limit, and e-mail support. Pro costs $49.99 per month for 50,000 requests, two API keys, sandbox API keys, no rate limit, e-mail support, and team management. Scale costs $109.99 per month for 250,000 requests, five API keys, sandbox API keys, no rate limit, tailored support, and team management. Custom includes custom requests and API keys alongside sandbox API keys, no rate limit, tailored support, and team management.
The developer ecosystem is a clear strength for teams working with common web and server-side languages. Official SDKs are available for JavaScript, Ruby, PHP, and Python, while a Postman collection supports API exploration and request workflows. The product remains focused on phone-data validation rather than a wider communications suite, so it fits applications that need lookup and enrichment through an API. Choose it for straightforward validation, carrier identification, and line-type data at a low entry price. Consider another option if your team needs broader language coverage or a less API-centered workflow.
numlookupapi.com pros and cons
- Where it wins
- Free plan with 100 requests per month
- Carrier, line-type, country, location, and format data
- Official JavaScript, Ruby, PHP, and Python SDKs
- Where it doesn't
- Free plan is limited to 100 requests
- Basic includes only one API key
- Listed SDK support covers four programming languages
numlookupapi.com fact sheet, pricing and score →
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