# NumLookupAPI, contact us: Phone validation API

> Number lookup API for 230+ countries: validate phone numbers, get the carrier, line type and VoIP flag, and format them to E.164.

NumLookupAPI's phone validation API on its Custom plan.

- This page: https://datacircle.dev/validate-phone-apis/numlookupapi/contact-us
- Get it: https://numlookupapi.com/pricing/
- Its API docs: https://numlookupapi.com/docs/validate/
- Sold by: NumLookupAPI (https://numlookupapi.com)
- Checked: 2026-10-14

## Price

- Billing: contact

## In their words

- Their pitch: Number lookup API for 230+ countries: validate phone numbers, get the carrier, line type and VoIP flag, and format them to E.164.

## Data

- Freshness: stored
- Keep data: no limit
- Use data: lawful use, for the service's intended purposes, the service not reproduced or resold without written approval

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: number, country_code
- Method: GET
- Path: /v1/validate/{number}

## About the plan

- Plan: Custom
- 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](https://datacircle.dev/validate-phone-apis/numlookupapi/free/llms.txt): $0.00 per 1,000, stored
- [NumLookupAPI, $9.99 monthly](https://datacircle.dev/validate-phone-apis/numlookupapi/9-99-monthly/llms.txt): $1.998 per 1,000, stored
- [NumLookupAPI, $49.99 monthly](https://datacircle.dev/validate-phone-apis/numlookupapi/49-99-monthly/llms.txt): $0.9998 per 1,000, stored
- [NumLookupAPI, $109.99 monthly](https://datacircle.dev/validate-phone-apis/numlookupapi/109-99-monthly/llms.txt): $0.44 per 1,000, stored
- [NumLookupAPI, $179.99 monthly](https://datacircle.dev/validate-phone-apis/numlookupapi/179-99-monthly/llms.txt): $0.36 per 1,000, stored
- [NumLookupAPI, $449.99 yearly](https://datacircle.dev/validate-phone-apis/numlookupapi/449-99-yearly/llms.txt): $0.577 per 1,000, stored
- [NumLookupAPI, $899.99 yearly](https://datacircle.dev/validate-phone-apis/numlookupapi/899-99-yearly/llms.txt): $0.25 per 1,000, stored
- [NumLookupAPI, contact us](https://datacircle.dev/validate-phone-apis/numlookupapi/contact-us/llms.txt): stored

## NumLookupAPI's calls (1)

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

## Similar plans of other providers

- [APILayer, contact us](https://datacircle.dev/validate-phone-apis/apilayer/contact-us/llms.txt): stored
- [Melissa, contact us](https://datacircle.dev/validate-phone-apis/melissa/contact-us/llms.txt): stored
- [Trestle, contact us](https://datacircle.dev/validate-phone-apis/trestle/contact-us/llms.txt): stored
- [Veriphone, contact us](https://datacircle.dev/validate-phone-apis/veriphone/contact-us/llms.txt): stored

## Sources

From each provider's own pricing page and docs. We read this row from these pages on 2026-10-14.

- https://api.numlookupapi.com/v1/agent/plans
- https://numlookupapi.com/
- https://numlookupapi.com/agents.md
- 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/terms-of-service/