# NumLookupAPI, free, GET /v1/validate/{number}: 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. It costs $0.00 per 1,000 phones. It returns 6 of the 9 key fields we check: Number, Formats, Validity, Type, Carrier, Place.
We rank 614 plans by price. [Botoi's $199 monthly plan](https://datacircle.dev/validate-phone-apis/botoi/199-monthly/llms.txt) is the cheapest paid plan per 1,000 phones: as little as $0.0066. Botoi's $199 monthly plan covers up to 1,000,000 phones a day.
[Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt), [Abstract API](https://datacircle.dev/validate-phone-apis/abstract-api/19-monthly-starter-5000-requests-month/llms.txt) and [Listar](https://datacircle.dev/validate-phone-apis/listar/top-up-from-10-starter-post-search-verify-whatsapp/llms.txt) are the best phone validation API providers in our benchmark.

- This page: https://datacircle.dev/validate-phone-apis/numlookupapi/free-get-v1-validate-number
- [Best phone validation API in 2026](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://numlookupapi.com/pricing/
- Request: `GET https://api.numlookupapi.com/v1/validate/{number}`
- API key: with the plan, on https://numlookupapi.com/pricing/
- Its API docs: https://numlookupapi.com/docs/validate/
- Sold by: NumLookupAPI (https://numlookupapi.com)
- Checked: 2026-10-18

## In the answer

- Completeness: 67%
- Number: ✓
- Formats: ✓
- Validity: ✓
- Type: ✓
- Carrier: ✓
- Place: ✓

## Price

- $ per 1,000 phones: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Batch Validation

## 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 calls a month
- Expires: at the end of each month

## Rate limit

- Per second: 0.17
- Batch: 1

## Speed

- Answer: in the call

## The call

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

## About the plan

- Plan: Free
- Who can get it: anyone

## The 16 fields the plan's answer can hold

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, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/free-get-v1-validate-number/llms.txt): $0.00 per 1,000, 67% complete, stored
- [NumLookupAPI, $9.99 monthly, Basic, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/9-99-monthly-basic-get-v1-validate-number/llms.txt): $1.998 per 1,000, 67% complete, stored
- [NumLookupAPI, $49.99 monthly, Pro, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/49-99-monthly-pro-get-v1-validate-number/llms.txt): $0.9998 per 1,000, 67% complete, stored
- [NumLookupAPI, $109.99 monthly, Scale, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/109-99-monthly-scale-get-v1-validate-number/llms.txt): $0.44 per 1,000, 67% complete, stored
- [NumLookupAPI, $179.99 monthly, scale 500k, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/179-99-monthly-scale-500k-get-v1-validate-number/llms.txt): $0.36 per 1,000, 67% complete, stored
- [NumLookupAPI, $449.99 yearly, medium, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/449-99-yearly-medium-get-v1-validate-number/llms.txt): $0.577 per 1,000, 67% complete, stored
- [NumLookupAPI, $899.99 yearly, large, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/899-99-yearly-large-get-v1-validate-number/llms.txt): $0.25 per 1,000, 67% complete, stored
- [NumLookupAPI, contact us, Custom, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/contact-us-custom-get-v1-validate-number/llms.txt): 67% complete, stored

## NumLookupAPI's calls (2)

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

## NumLookupAPI's APIs (1)

- [NumLookupAPI: phone validation API pricing, 8 plans, GET /v1/validate/{number}](https://datacircle.dev/validate-phone-apis/numlookupapi/free-get-v1-validate-number/llms.txt)

## NumLookupAPI: phone validation API alternatives

- [Veriphone, $249 monthly, Enterprise, GET /v3/verify, /v3/verify](https://datacircle.dev/validate-phone-apis/veriphone/249-monthly-enterprise-get-v3-verify-v3-verify/llms.txt): $0.249 per 1,000, 78% complete, stored
- [APIFreaks, $10 monthly, Monthly 80,000 credits, POST /phone/validation/bulk](https://datacircle.dev/validate-phone-apis/apifreaks/10-monthly-monthly-80000-credits-post-phone-validation-bulk/llms.txt): $0.25 per 1,000, 67% complete, stored
- [ReefAPI, $1,200 yearly, Enterprise yearly, POST /phone-validate/v1/validate](https://datacircle.dev/validate-phone-apis/reefapi/1200-yearly-enterprise-yearly-post-phone-validate-v1-validate/llms.txt): $0.333 per 1,000, 67% complete, stored
- [ProWebLook, $499.20 yearly](https://datacircle.dev/validate-phone-apis/proweblook/499-20-yearly/llms.txt): $0.416 per 1,000, 67% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. 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/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/