# NumberVerifyAPI, free: Phone validation API

> Validate phone numbers worldwide and reveal the carrier and line type from one fast, pay-per-hit API.

NumberVerifyAPI's Free plan for the phone validation API costs $0.00 per 1,000 phones. We check each provider's docs for 9 fields. NumberVerifyAPI's docs list 6: Number, Formats, Validity, Type, Carrier, Place.
In [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt), the best plan from NumberVerifyAPI scores 0.0 out of 100. NumberVerifyAPI ranks 46th of 66 providers.
This plan is free. We rank 1,339 plans for phone validation APIs by price. Half the plans cost $2.867 or less per 1,000 phones. [297 phone validation API plans on our price sheet are free.](https://datacircle.dev/best-phone-validation-api.txt) [Trestle](https://datacircle.dev/validate-phone-apis/trestle/free/llms.txt) has a free plan with 25 calls in total. Trestle is the best phone validation API in our benchmark.
[Linq's $260 monthly plan](https://datacircle.dev/validate-phone-apis/linq/260-monthly-pro-post-v3-capability-check-imessage/llms.txt) is the cheapest paid plan per 1,000 phones. Linq's phone validation API costs nothing beyond the plan price. [Keyronne's pay-as-you-go plan](https://datacircle.dev/validate-phone-apis/keyronne/pay-as-you-go/llms.txt) costs the least for 10,000 phones a month: $0.20.
[Trestle](https://datacircle.dev/validate-phone-apis/trestle/top-up-from-10-self-serve-pay-as-you-go-get-3-0-phone-intel-phone-validation-api/llms.txt), [Signal House](https://datacircle.dev/validate-phone-apis/signal-house/top-up-from-10/llms.txt) and [Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/numberverifyapi/free
- [Phone validation API in 2026: the best of 60+ compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://numberverifyapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `GET https://numberverifyapi.com/v1/lookup`
- API key: with the plan, on https://numberverifyapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://numberverifyapi.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: NumberVerifyAPI (https://numberverifyapi.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-11

## 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: nothing else

## Overage

- Units cap: hard

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: Validate phone numbers worldwide and reveal the carrier and line type from one fast, pay-per-hit API.

## Data

- Freshness: stored
- Countries: Worldwide
- What it checks: numbering plan
- Keep data: no limit
- Use data: "Your API key is personal to your account. Keep it secret and do not share, resell or publish it. You agree not to: Use the Service in violation of any law, including privacy, telemarketing and anti-spam laws. Use the Service to harass, stalk, or harm any person, or to build profiles of individuals without a lawful basis. Attempt to bypass rate limits, credit charges, authentication or other security measures. Reverse engineer, scrape, or resell the Service without our written permission. Use the Service in any way that damages, disables or impairs its operation." "You are solely responsible for how you use the data returned by the Service and for complying with the laws that apply to you." "You should not rely on the Service as the sole basis for any decision with legal, financial or safety consequences."

## Plan

- Pay: $0
- You get: 100 credits
- Enough for: 100 calls, once
- Expires: never

## Rate limit

- Concurrent: no limit
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: number. Optional: country_code
- Method: GET
- Path: /lookup

## About the plan

- Plan: Free
- Who can get it: anyone: the terms' "You must be at least 16 years old and able to form a binding contract."

## The 9 fields the plan's answer can hold

phone number, national format, international format, E.164 format, country code, country calling code, carrier, line type, valid

## NumberVerifyAPI's plans (5)

- [NumberVerifyAPI, free](https://datacircle.dev/validate-phone-apis/numberverifyapi/free/llms.txt): $0.00 per 1,000, 67% complete, stored
- [NumberVerifyAPI, $9.99 pack](https://datacircle.dev/validate-phone-apis/numberverifyapi/9-99-pack/llms.txt): $1.998 per 1,000, 67% complete, stored
- [NumberVerifyAPI, $49.99 pack](https://datacircle.dev/validate-phone-apis/numberverifyapi/49-99-pack/llms.txt): $0.9998 per 1,000, 67% complete, stored
- [NumberVerifyAPI, $109.99 pack](https://datacircle.dev/validate-phone-apis/numberverifyapi/109-99-pack/llms.txt): $0.44 per 1,000, 67% complete, stored
- [NumberVerifyAPI, contact us](https://datacircle.dev/validate-phone-apis/numberverifyapi/contact-us/llms.txt): 67% complete, stored

## NumberVerifyAPI's calls (1)

- `GET /lookup`: [NumberVerifyAPI, free](https://datacircle.dev/validate-phone-apis/numberverifyapi/free/llms.txt)

## NumberVerifyAPI's APIs (1)

- [NumberVerifyAPI Phone validation API pricing, 5 plans](https://datacircle.dev/validate-phone-apis/numberverifyapi/free/llms.txt)

## NumberVerifyAPI: phone validation API alternatives

[NumberVerifyAPI alternatives: every phone validation API provider ranked](https://datacircle.dev/numberverifyapi-alternatives.txt)

We list NumberVerifyAPI's cheapest paid plan first. Next we list other providers' plans closest to NumberVerifyAPI in price per 1,000 phones. Each plan in the list gives stored data.

- [NumberVerifyAPI, $109.99 pack](https://datacircle.dev/validate-phone-apis/numberverifyapi/109-99-pack/llms.txt): $0.44 per 1,000, 67% complete, stored
- [Veriphone, $399 pack, 1,000,000 credits, GET /v3/verify, /v3/verify](https://datacircle.dev/validate-phone-apis/veriphone/399-pack-1000000-credits-get-v3-verify-v3-verify/llms.txt): $0.399 per 1,000, 78% 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
- [NumLookupAPI, $109.99 monthly, Scale, POST /v1/validate, Batch Validation](https://datacircle.dev/validate-phone-apis/numlookupapi/109-99-monthly-scale-post-v1-validate/llms.txt): $0.44 per 1,000, 67% complete, stored
- [Numverify by APILayer, $1,325.99 yearly](https://datacircle.dev/validate-phone-apis/numverify-by-apilayer/1325-99-yearly/llms.txt): $0.442 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 2026-11-11.

- https://github.com/numberverifyapi/num-verify-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberverifyapi.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberverifyapi.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberverifyapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberverifyapi.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberverifyapi.com/why-choose-us?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing