# Accurate Append, free: Phone validation API

> Identifies syntactically incorrect phone numbers and phone numbers that have not been issued according to the North American Numbering Plan Association (NANPA).

Accurate Append's phone validation API on its Free Trial Key plan. It costs $0.00 per 1,000 phones. It returns 4 of the 9 key fields we check: Number, Validity, Type, Place.
We haven't run Accurate Append through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 768 plans for phone validation APIs by price. Half the plans cost $3.60 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/accurate-append/free
- [Phone validation API: 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://accurateappend.com/pricing-beta/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `GET https://api.accurateappend.com/Services/V2/ValidatePhone/{licensekey}/`
- API key: with the plan, on https://accurateappend.com/pricing-beta/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://docs.accurateappend.com/reference/validatephone?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: Accurate Append (https://accurateappend.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 44%
- Number: ✓
- Validity: ✓
- Type: ✓
- Place: ✓

## Price

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

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Identifies syntactically incorrect phone numbers and phone numbers that have not been issued according to the North American Numbering Plan Association (NANPA).

## Data

- Countries: United States
- What it checks: numbering plan
- Keep data: no limit
- Use data: You are prohibited from using the information you learn from search results (1) to discriminate against any consumer, (2) for the purpose of considering a consumer’s eligibility for personal credit or insurance, employment, housing, or a government license or benefit, or (3) otherwise to affect a consumer’s economic or financial status or standing.

## Plan

- Pay: $0
- You get: 500 requests
- Enough for: 500 calls
- Expires: 30 days

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: phone, postalcode, verifyconnectionstatus, Content-Type header "application/json"
- Method: GET
- Path: /ValidatePhone/{licensekey}/

## About the plan

- Plan: Free Trial Key
- Who can get it: anyone, no credit card required

## The 24 fields the plan's answer can hold

host, request date, request IP, transaction ID, telephone in, postal code in, area code, prefix, suffix, city, state, country code, county FIPS code, county name, distance, MSA, PMSA, time zone, time zone code, line type, connection score, status type, status code, status description

## Accurate Append's plans (2)

- [Accurate Append, free](https://datacircle.dev/validate-phone-apis/accurate-append/free/llms.txt): $0.00 per 1,000, 44% complete
- [Accurate Append, contact us](https://datacircle.dev/validate-phone-apis/accurate-append/contact-us/llms.txt): 44% complete

## Accurate Append's calls for this API (1)

- `GET /ValidatePhone/{licensekey}/`: [Accurate Append, free](https://datacircle.dev/validate-phone-apis/accurate-append/free/llms.txt)

## Accurate Append's APIs (3)

- [Accurate Append: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/accurate-append/free/llms.txt)
- [Accurate Append: phone validation API pricing, 2 plans](https://datacircle.dev/validate-phone-apis/accurate-append/free/llms.txt)
- [Accurate Append: reverse email lookup API pricing, 10 plans](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/free/llms.txt)

## Accurate Append: phone validation API alternatives

- [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
- [Abstract API, free](https://datacircle.dev/validate-phone-apis/abstract-api/free/llms.txt): $0.00 per 1,000, 89% complete, 1 day
- [seven.io, free test credit, GET /api/lookup/hlr](https://datacircle.dev/validate-phone-apis/seven-io/free-test-credit-get-api-lookup-hlr/llms.txt): $0.00 per 1,000, 78% complete, live
- [8x8, free](https://datacircle.dev/validate-phone-apis/8x8/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 2026-11-02.

- https://accurateappend.com/fair-credit-reporting-act-statement/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://accurateappend.com/pricing-beta/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://accurateappend.com/terms-of-use/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.accurateappend.com/docs/appending-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.accurateappend.com/docs/mcp-overview?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.accurateappend.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.accurateappend.com/reference/validatephone?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing