# NumLookup, contact us: Phone validation API

> Check that the number on a signup is a real, connected line — and that the name attached to it matches the account being opened.

NumLookup's phone validation API on its Enterprise access plan. It returns 4 of the 9 key fields we check: Validity, Type, Carrier, Risk.
We haven't run NumLookup through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
NumLookup gives this plan's price on request. We rank 888 plans for phone validation APIs by price. Half the plans cost $3.376 per 1,000 phones or less.
[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), [Foxentry](https://datacircle.dev/validate-phone-apis/foxentry/top-up-pay-as-you-go-post-phone-validate-validate-phone-number-extended/llms.txt) and [HLR Lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/top-up-1-1m-post-hlr-lookup/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/numlookup/contact-us
- [Phone validation API: 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://www.numlookup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: Docs on request from sales
- API key: with the plan, on https://www.numlookup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://www.numlookup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: NumLookup (https://www.numlookup.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 44%
- Validity: ✓
- Type: ✓
- Carrier: ✓
- Risk: ✓

## Price

- Billing: contact

## Aggregators

- Aggregators: none

## In their words

- Their pitch: Check that the number on a signup is a real, connected line — and that the name attached to it matches the account being opened.

## Data

- Freshness: live
- Countries: United States
- What it checks: carrier, line in service
- Keep data: no API terms
- Use data: This API is not a consumer report and is not intended for eligibility decisions covered by the Fair Credit Reporting Act — including employment screening, tenant screening, credit and insurance underwriting. Customers agree to those limits in writing before their key is issued.

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: Docs on request from sales

## About the plan

- Plan: Enterprise access
- Who can get it: Enterprise data and engineering teams: access is reviewed before it's granted, with a minimum annual commitment

## The 7 fields the plan's answer can hold

valid number, connection status, line type, carrier name, prepaid indicator, spam score, risk level

## NumLookup's plans (1)

- [NumLookup, contact us](https://datacircle.dev/validate-phone-apis/numlookup/contact-us/llms.txt): 44% complete, live

## NumLookup's calls (1)

- Docs on request from sales: [NumLookup, contact us](https://datacircle.dev/validate-phone-apis/numlookup/contact-us/llms.txt)

## NumLookup's APIs (2)

- [NumLookup: people enrichment API pricing, 1 plan](https://datacircle.dev/person-enrichment-apis/numlookup/contact-us/llms.txt)
- [NumLookup: phone validation API pricing, 1 plan](https://datacircle.dev/validate-phone-apis/numlookup/contact-us/llms.txt)

## NumLookup: phone validation API alternatives

- [HLR Lookups, contact us, Postpaid account, POST /mnp-lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/contact-us-postpaid-account-post-mnp-lookups/llms.txt): 44% complete, live
- [CallerAPI, contact us, Enterprise transparency $40,000+, GET /api/network-lookup/{phone}](https://datacircle.dev/validate-phone-apis/callerapi/contact-us-enterprise-transparency-40000-get-api-network-lookup-phone/llms.txt): 44% complete, live
- [Addressfinder, contact us](https://datacircle.dev/validate-phone-apis/addressfinder/contact-us/llms.txt): 44% complete, live
- [NumRadar, contact us, Dedicated plan, POST /validate](https://datacircle.dev/validate-phone-apis/numradar/contact-us-dedicated-plan-post-validate/llms.txt): 44% complete, live
- [Mitto, contact us](https://datacircle.dev/validate-phone-apis/mitto/contact-us/llms.txt): 44% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-04.

- https://www.numlookup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.numlookup.com/terms-and-conditions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing