# NumLookupAPI, free, Free, POST /v1/validate: Phone validation API

> Send a phone number in any format and get back whether it is valid, its E.164, national and international formats, its country, carrier and line type.

NumLookupAPI's phone validation API on its Free plan, $0.00 per 1,000 phones.

- This page: https://datacircle.dev/validate-phone-apis/numlookupapi/free-free-post-v1-validate
- Get it: https://numlookupapi.com/pricing/
- Its API docs: https://numlookupapi.com/docs/batch/
- Sold by: NumLookupAPI (https://numlookupapi.com)
- Checked: 2026-10-18

## Price

- $ per 1,000: $0.00
- Billing: free

## Charges

- Per: result

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Send a phone number in any format and get back whether it is valid, its E.164, national and international formats, its country, carrier and line type.

## Data

- Freshness: stored
- Keep data: no limit
- Use data: The Application and its services must be used lawfully and for their intended purposes [...] Users may not use content for purposes outside normal service usage. This includes prohibiting copying, sharing, editing, sublicensing, or selling content, unless explicitly allowed [...] Users may not reproduce or resell the service unless given prior written approval by the Owner.

## Plan

- Pay: $0
- You get: 100 requests a month
- Enough for: 100 results a month
- Expires: at the end of each month

## Rate limit

- Per second: 0.17
- Batch: 100

## Speed

- Answer: in the call

## The call

- You send: numbers. Optional: country_code
- Method: POST
- Path: /v1/validate

## About the plan

- Plan: Free
- Who can get it: anyone

## The 16 fields in the plan's answer

valid, phone number, local format, international format, country calling code, country code, country, location, carrier, line type, E.164 format, national format, RFC 3966 format, possible number, number type, time zone

## NumLookupAPI's plans (8)

- [NumLookupAPI, free, Free, POST /v1/validate](https://datacircle.dev/validate-phone-apis/numlookupapi/free-free-post-v1-validate/llms.txt): $0.00 per 1,000, stored
- [NumLookupAPI, $9.99 monthly, Basic, POST /v1/validate](https://datacircle.dev/validate-phone-apis/numlookupapi/9-99-monthly-basic-post-v1-validate/llms.txt): $1.998 per 1,000, stored
- [NumLookupAPI, $49.99 monthly, Pro, POST /v1/validate](https://datacircle.dev/validate-phone-apis/numlookupapi/49-99-monthly-pro-post-v1-validate/llms.txt): $0.9998 per 1,000, stored
- [NumLookupAPI, $109.99 monthly, Scale, POST /v1/validate](https://datacircle.dev/validate-phone-apis/numlookupapi/109-99-monthly-scale-post-v1-validate/llms.txt): $0.44 per 1,000, stored
- [NumLookupAPI, $179.99 monthly, scale 500k, POST /v1/validate](https://datacircle.dev/validate-phone-apis/numlookupapi/179-99-monthly-scale-500k-post-v1-validate/llms.txt): $0.36 per 1,000, stored
- [NumLookupAPI, $449.99 yearly, medium, POST /v1/validate](https://datacircle.dev/validate-phone-apis/numlookupapi/449-99-yearly-medium-post-v1-validate/llms.txt): $0.577 per 1,000, stored
- [NumLookupAPI, $899.99 yearly, large, POST /v1/validate](https://datacircle.dev/validate-phone-apis/numlookupapi/899-99-yearly-large-post-v1-validate/llms.txt): $0.25 per 1,000, stored
- [NumLookupAPI, contact us, Custom, POST /v1/validate](https://datacircle.dev/validate-phone-apis/numlookupapi/contact-us-custom-post-v1-validate/llms.txt): stored

## NumLookupAPI's calls (2)

- `POST /v1/validate`: [NumLookupAPI, free, Free, POST /v1/validate](https://datacircle.dev/validate-phone-apis/numlookupapi/free-free-post-v1-validate/llms.txt)
- `GET /v1/validate/{number}`: [NumLookupAPI, free, Free, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/free/llms.txt)

## Similar plans of other providers

- [Trestle, free](https://datacircle.dev/validate-phone-apis/trestle/free/llms.txt): $0.00 per 1,000, stored
- [Veriphone, free](https://datacircle.dev/validate-phone-apis/veriphone/free/llms.txt): $0.00 per 1,000, stored
- [APILayer, free](https://datacircle.dev/validate-phone-apis/apilayer/free/llms.txt): $0.00 per 1,000, stored
- [Melissa, $3,200 pack, 1,000,000 Credits, GET /V4/WEB/GlobalPhone/doGlobalPhone](https://datacircle.dev/validate-phone-apis/melissa/3200-pack-1000000-credits-get-v4-web-globalphone-doglobalphone/llms.txt): $32.00 per 1,000, stored

## Sources

From each provider's own pricing page and docs. We read this row from these pages on 2026-10-18.

- https://api.numlookupapi.com/v1/agent/plans
- https://numlookupapi.com/
- https://numlookupapi.com/agents.md
- https://numlookupapi.com/docs/batch/
- https://numlookupapi.com/docs/openapi.yaml
- https://numlookupapi.com/docs/rate-limit/
- https://numlookupapi.com/docs/validate/
- https://numlookupapi.com/pricing/
- https://numlookupapi.com/products/hlr-lookup-api/
- https://numlookupapi.com/products/phone-validation-api/
- https://numlookupapi.com/terms-of-service/