# Twilio, free: Phone validation API

> Validate number format and look up provider and device type to reach verified users via voice and text.

Twilio's phone validation API on its Free trial plan, $0.00 per 1,000 phones.

- This page: https://datacircle.dev/validate-phone-apis/twilio/free
- Get it: https://www.twilio.com/en-us/user-authentication-identity/pricing/lookup
- Its API docs: https://www.twilio.com/docs/lookup/v2-api#making-a-request
- Sold by: Twilio (https://www.twilio.com)
- Checked: 2026-10-14

## Price

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

## Charges

- Per: call

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Validate number format and look up provider and device type to reach verified users via voice and text.

## Data

- Freshness: live
- Keep data: no limit
- Use data: any business use, but Line Type Intelligence, SIM Swap, Call Forwarding, Reassigned Number and Identity Match only to validate a consumer's identity, avert fraud or authenticate a transaction: not for marketing or selling, consumer reports, or credit, insurance or employment eligibility, the service not resold or offered to third parties on its own

## Plan

- Pay: $0
- Enough for: 100 calls, once
- Expires: 30 days

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: phone number, Fields, CountryCode, FirstName, LastName, AddressLine1, AddressLine2, City, State, PostalCode, AddressCountryCode, NationalId, DateOfBirth, LastVerifiedDate, VerificationSid, PartnerSubId
- Method: GET
- Path: /v2/PhoneNumbers/{PhoneNumber}

## About the plan

- Plan: Free trial
- Who can get it: new accounts of businesses and professionals, in the trial's countries, for 30 days

## The 14 fields in the plan's answer

E.164 format, local format, country code, country calling code, valid, invalid reason, lookup URL, carrier, line type, mobile country code, mobile network code, error code, caller name, caller type

## Twilio's plans (3)

- [Twilio, free](https://datacircle.dev/validate-phone-apis/twilio/free/llms.txt): $0.00 per 1,000, live
- [Twilio, top-up](https://datacircle.dev/validate-phone-apis/twilio/top-up/llms.txt): $0.00 per 1,000, live
- [Twilio, contact us](https://datacircle.dev/validate-phone-apis/twilio/contact-us/llms.txt): live

## Twilio's calls (1)

- `GET /v2/PhoneNumbers/{PhoneNumber}`: [Twilio, free](https://datacircle.dev/validate-phone-apis/twilio/free/llms.txt)

## Similar plans of other providers

- [Byteplant, free](https://datacircle.dev/validate-phone-apis/byteplant/free/llms.txt): $0.00 per 1,000, live
- [HLR Lookup, free](https://datacircle.dev/validate-phone-apis/hlr-lookup/free/llms.txt): $0.00 per 1,000, live
- [RealPhoneValidation, free](https://datacircle.dev/validate-phone-apis/realphonevalidation/free/llms.txt): $0.00 per 1,000, live
- [Telnyx, $10 pack](https://datacircle.dev/validate-phone-apis/telnyx/10-pack/llms.txt): $1.50 per 1,000, live

## Sources

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

- https://www.twilio.com/docs/lookup/lookup-sim-swap
- https://www.twilio.com/docs/lookup/v2-api
- https://www.twilio.com/docs/lookup/v2-api/call-forwarding
- https://www.twilio.com/docs/lookup/v2-api/caller-name
- https://www.twilio.com/docs/lookup/v2-api/formatting-validation
- https://www.twilio.com/docs/lookup/v2-api/identity-match
- https://www.twilio.com/docs/lookup/v2-api/line-status
- https://www.twilio.com/docs/lookup/v2-api/line-type-intelligence
- https://www.twilio.com/docs/lookup/v2-api/reassigned-number
- https://www.twilio.com/docs/lookup/v2-api/sim-swap
- https://www.twilio.com/docs/lookup/v2-api/sms-pumping-risk
- https://www.twilio.com/docs/usage/trials
- https://www.twilio.com/docs/usage/trials/try-out-lookup
- https://www.twilio.com/en-us/legal/service-country-specific-terms
- https://www.twilio.com/en-us/legal/service-country-specific-terms/identity-verification
- https://www.twilio.com/en-us/legal/tos
- https://www.twilio.com/en-us/user-authentication-identity/lookup
- https://www.twilio.com/en-us/user-authentication-identity/pricing/lookup