# LastDatabase, free: Phone validation API

> Validate and normalize a phone number using the shared verification-credit system and an idempotency key.

LastDatabase's Free plan for the phone validation API costs $0.00 per 1,000 phones. LastDatabase's docs list none of the 9 fields on our checklist: Number, Formats, Validity, Type and 5 more.
We haven't run LastDatabase through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 1,148 plans for phone validation APIs by price. Half the plans cost $2.991 per 1,000 phones or less. [See the best free phone validation API plan.](https://datacircle.dev/best-phone-validation-api.txt)
[GuGuData's CNY 124 (about $19) monthly plan](https://datacircle.dev/validate-phone-apis/gugudata/cny-124-monthly/llms.txt) is the cheapest paid plan per 1,000 phones. GuGuData's CNY 124 (about $19) monthly plan charges nothing per call. You get as many phones as GuGuData's rate limit allows. [Neutrino API's On-Demand plan](https://datacircle.dev/validate-phone-apis/neutrino-api/pay-as-you-go-on-demand/llms.txt) costs the least for 10,000 phones a month: $0.80.
[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), [Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt) and [Abstract API](https://datacircle.dev/validate-phone-apis/abstract-api/19-monthly-starter-5000-requests-month/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/lastdatabase/free
- [Phone validation API: the best of 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://lastdatabase.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `POST https://lastdatabase.com/api/integrations/v1/phone/verify`
- API key: with the plan, on https://lastdatabase.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://lastdatabase.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: LastDatabase (https://lastdatabase.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 0%

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Lead Data Search API · Search people · Unlock a person · Email Verification API · WhatsApp Number Verification API · Telegram Number Verification API · Credits and Usage API

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Validate and normalize a phone number using the shared verification-credit system and an idempotency key.

## Data

- Keep data: no limit
- Use data: You may not use LastDatabase services for: Illegal, fraudulent or deceptive activities. Harassment, threats or abusive communications. Unauthorized access to systems or accounts. Violation of applicable privacy or marketing laws. Misrepresentation of identity or affiliation. Abuse or circumvention of API limits or security controls. Unauthorized resale or redistribution of protected platform assets. Activities that materially interfere with our services or infrastructure. Customers are responsible for ensuring that their use of data and services complies with laws and regulations applicable to their activities and jurisdictions.

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: phone, idempotency_key. Optional: country
- Method: POST
- Path: /api/integrations/v1/phone/verify

## About the plan

- Plan: Free
- Who can get it: anyone with a verified LastDatabase account

## The 3 fields the plan's answer can hold

verification result, normalized phone number, numbering plan metadata

## LastDatabase's plans (3)

- [LastDatabase, free](https://datacircle.dev/validate-phone-apis/lastdatabase/free/llms.txt): $0.00 per 1,000, 0% complete
- [LastDatabase, $99 monthly](https://datacircle.dev/validate-phone-apis/lastdatabase/99-monthly/llms.txt): 0% complete
- [LastDatabase, $499 monthly](https://datacircle.dev/validate-phone-apis/lastdatabase/499-monthly/llms.txt): 0% complete

## LastDatabase's calls for this API (1)

- `POST /api/integrations/v1/phone/verify`: [LastDatabase, free](https://datacircle.dev/validate-phone-apis/lastdatabase/free/llms.txt)

## LastDatabase's APIs (3)

- [LastDatabase: email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/lastdatabase/free/llms.txt)
- [LastDatabase: people search API pricing, 3 plans](https://datacircle.dev/people-search-apis/lastdatabase/free/llms.txt)
- [LastDatabase: phone validation API pricing, 3 plans](https://datacircle.dev/validate-phone-apis/lastdatabase/free/llms.txt)

## LastDatabase: phone validation API alternatives

- [Trestle, free trial, GET /3.0/phone_intel](https://datacircle.dev/validate-phone-apis/trestle/free/llms.txt): $0.00 per 1,000, 56% complete, stored
- [Abstract API, free](https://datacircle.dev/validate-phone-apis/abstract-api/free/llms.txt): $0.00 per 1,000, 89% complete, 1 day
- [Foxentry, free trial, POST /phone/validate, Validate phone number (basic)](https://datacircle.dev/validate-phone-apis/foxentry/free-trial-post-phone-validate-validate-phone-number-basic/llms.txt): $0.00 per 1,000, 56% complete, stored
- [HLR Lookups, free, 100 free lookups, POST /nt-lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/free-100-free-lookups-post-nt-lookups/llms.txt): $0.00 per 1,000, 67% complete, stored
- [Greip, free](https://datacircle.dev/validate-phone-apis/greip/free/llms.txt): $0.00 per 1,000, 56% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-07.

- https://lastdatabase.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://lastdatabase.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://lastdatabase.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://lastdatabase.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://lastdatabase.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing