# Trestle, free: Phone validation API

> Phone Validation API allows businesses to identify disconnected phone numbers, line type, carrier lookup, and more for all phone validation needs.

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

- This page: https://datacircle.dev/validate-phone-apis/trestle/free
- Get it: https://trestleiq.com/pricing/
- Its API docs: https://docs.trestleiq.com/api-reference/phone-validation-api
- Sold by: Trestle (https://trestleiq.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: Phone Validation API allows businesses to identify disconnected phone numbers, line type, carrier lookup, and more for all phone validation needs.

## Data

- Freshness: stored
- Keep data: the agreement's term, for internal business purposes
- Use data: identity or lead verification, caller identification, routing, prioritization, scrubbing lists for outbound dialing, marketing only in response to an inbound request, not resold or made available to others, no FCRA purpose, not cached to avoid queries, merged only tagged as Trestle's

## Plan

- Pay: $0
- Enough for: 25 calls, once
- Expires: 14 days

## Rate limit

- Per second: 10
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: phone, phone.country_hint, add_ons, source_id
- Method: GET
- Path: /3.0/phone_intel

## About the plan

- Plan: Free trial
- Who can get it: companies, with a business email address

## The 13 fields in the plan's answer

phone ID, phone number, valid, activity score, country calling code, country code, country, line type, carrier, prepaid, error code, error message, warnings

## Trestle's plans (3)

- [Trestle, free](https://datacircle.dev/validate-phone-apis/trestle/free/llms.txt): $0.00 per 1,000, stored
- [Trestle, $10 pack](https://datacircle.dev/validate-phone-apis/trestle/10-pack/llms.txt): $15.00 per 1,000, stored
- [Trestle, contact us](https://datacircle.dev/validate-phone-apis/trestle/contact-us/llms.txt): stored

## Trestle's calls (1)

- `GET /3.0/phone_intel`: [Trestle, free](https://datacircle.dev/validate-phone-apis/trestle/free/llms.txt)

## Similar plans of other providers

- [APILayer, free](https://datacircle.dev/validate-phone-apis/apilayer/free/llms.txt): $0.00 per 1,000, stored
- [Melissa, $4.97 pack](https://datacircle.dev/validate-phone-apis/melissa/4-97-pack/llms.txt): $0.00 per 1,000, stored
- [NumLookupAPI, free](https://datacircle.dev/validate-phone-apis/numlookupapi/free/llms.txt): $0.00 per 1,000, stored
- [Veriphone, free](https://datacircle.dev/validate-phone-apis/veriphone/free/llms.txt): $0.00 per 1,000, stored

## Sources

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

- https://docs.trestleiq.com/api-reference/phone-validation-api
- https://docs.trestleiq.com/openapi/phone-validation.openapi.yaml
- https://trestleiq.com/knowledge-base/developer-portal-wallet-frequently-asked-questions/
- https://trestleiq.com/knowledge-base/getting-started-with-trestles-developer-portal-wallet/
- https://trestleiq.com/knowledge-base/how-is-trestles-phone-activity-score-calculated/
- https://trestleiq.com/knowledge-base/understanding-trestles-free-api-trial-and-the-api-access-request-process-for-specific-products/
- https://trestleiq.com/knowledge-base/what-are-the-various-sources-of-trestles-identity-data/
- https://trestleiq.com/knowledge-base/what-is-our-global-phone-validation-coverage/
- https://trestleiq.com/knowledge-base/what-is-the-default-and-max-qps-supported/
- https://trestleiq.com/knowledge-base/what-queries-are-billable/
- https://trestleiq.com/knowledge-base/why-wont-my-email-work-to-signup-for-trestle/
- https://trestleiq.com/phone-validation-api/
- https://trestleiq.com/pricing/
- https://trestleiq.com/terms-of-service/