# Osint, free: Phone validation API

> To find a phone number’s carrier, enter the number with its country code: you see whether it’s a valid number, the line type (mobile, landline, VoIP and so on), the carrier its range was allocated to, and the region and time zone it was issued in - free, with no account.

Osint's Free account plan for the phone validation API costs $0.00 per 1,000 phones. We check each provider's docs for 9 fields. Osint's docs list 5: Formats, Validity, Type, Carrier, Place.
We haven't run Osint through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 1,266 plans for phone validation APIs by price. Half the plans cost $3.55 or less per 1,000 phones. [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/osint/free
- [Phone validation API: the best of 50+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://osint.foundation/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `GET https://osint.foundation/api/v1/phone/{number}`
- API key: with the plan, on https://osint.foundation/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://osint.foundation/phone-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: Osint (https://osint.foundation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 56%
- Formats: ✓
- Validity: ✓
- Type: ✓
- Carrier: ✓
- Place: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: To find a phone number’s carrier, enter the number with its country code: you see whether it’s a valid number, the line type (mobile, landline, VoIP and so on), the carrier its range was allocated to, and the region and time zone it was issued in - free, with no account.

## Data

- Countries: Worldwide
- What it checks: numbering plan
- Keep data: no limit
- Use data: Use the service only for lawful purposes, such as security research, fraud prevention, due diligence, journalism, investigations and checking your own exposure [...] You must not use the service, or anything it returns, to: stalk, harass, threaten, dox or intimidate anyone, [...] make decisions about a person’s employment, housing, credit or insurance, or discriminate against anyone, commit or facilitate fraud, identity theft or any other crime, resell or republish raw results as a competing dataset or service without our written permission, get around rate limits, credit metering or account restrictions, scrape the website instead of using the API, or repeatedly send input the service cannot process, attack, probe or overload the service or its infrastructure.

## Plan

- Pay: $0
- You get: 3 credits a day
- Enough for: 3 calls a day

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: number
- Method: GET
- Path: /v1/phone/{number}

## About the plan

- Plan: Free account
- Who can get it: anyone aged 18 or over who can enter a binding contract, with an email-verified account

## The 12 fields the plan's answer can hold

valid, possible, invalid reason, line type, carrier, country, location, time zones, E.164 format, international format, national format, RFC 3966 format

## Osint's plans (7)

- [Osint, free](https://datacircle.dev/validate-phone-apis/osint/free/llms.txt): $0.00 per 1,000, 56% complete
- [Osint, $4.20 pack](https://datacircle.dev/validate-phone-apis/osint/4-20-pack/llms.txt): $84.00 per 1,000, 56% complete
- [Osint, $29.99 pack](https://datacircle.dev/validate-phone-apis/osint/29-99-pack/llms.txt): $29.99 per 1,000, 56% complete
- [Osint, $99.99 pack](https://datacircle.dev/validate-phone-apis/osint/99-99-pack/llms.txt): $9.999 per 1,000, 56% complete
- [Osint, $699 pack](https://datacircle.dev/validate-phone-apis/osint/699-pack/llms.txt): $1.398 per 1,000, 56% complete
- [Osint, $1,999 pack](https://datacircle.dev/validate-phone-apis/osint/1999-pack/llms.txt): $0.20 per 1,000, 56% complete
- [Osint, contact us](https://datacircle.dev/validate-phone-apis/osint/contact-us/llms.txt): 56% complete

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

- `GET /v1/phone/{number}`: [Osint, free](https://datacircle.dev/validate-phone-apis/osint/free/llms.txt)

## Osint's APIs (13)

- [Osint: Facebook page API pricing, 7 plans](https://datacircle.dev/facebook-page-apis/osint/free/llms.txt)
- [Osint: GitHub profile API pricing, 7 plans](https://datacircle.dev/github-profile-apis/osint/free/llms.txt)
- [Osint: Instagram profile API pricing, 7 plans](https://datacircle.dev/instagram-profile-apis/osint/free/llms.txt)
- [Osint: business verification API pricing, 7 plans](https://datacircle.dev/business-verification-apis/osint/free/llms.txt)
- [Osint: domain WHOIS API pricing, 7 plans](https://datacircle.dev/domain-whois-apis/osint/free/llms.txt)
- [Osint: IP company lookup API pricing, 7 plans](https://datacircle.dev/ip-company-lookup-apis/osint/free/llms.txt)
- [Osint: local business search API pricing, 7 plans](https://datacircle.dev/local-business-search-apis/osint/free/llms.txt)
- [Osint: phone validation API pricing, 7 plans](https://datacircle.dev/validate-phone-apis/osint/free/llms.txt)
- [Osint: reverse email lookup API pricing, 7 plans](https://datacircle.dev/reverse-email-lookup-apis/osint/free/llms.txt)
- [Osint: web scraping API pricing, 7 plans](https://datacircle.dev/web-scraping-apis/osint/free/llms.txt)
- [Osint: Snapchat profile API pricing, 7 plans](https://datacircle.dev/snapchat-profile-apis/osint/free/llms.txt)
- [Osint: Telegram channel API pricing, 7 plans](https://datacircle.dev/telegram-channel-apis/osint/free/llms.txt)
- [Osint: TikTok profile API pricing, 7 plans](https://datacircle.dev/tiktok-profile-apis/osint/free/llms.txt)

## Osint: phone validation API alternatives

- [Veriphone, $999 pack, 5,000,000 credits, GET /v3/verify, /v3/verify](https://datacircle.dev/validate-phone-apis/veriphone/999-pack-5000000-credits-get-v3-verify-v3-verify/llms.txt): $0.20 per 1,000, 78% complete, stored
- [APIFreaks, $1,000 pack, One-Off 10,000,000 credits, POST /phone/validation/bulk](https://datacircle.dev/validate-phone-apis/apifreaks/1000-pack-one-off-10000000-credits-post-phone-validation-bulk/llms.txt): $0.20 per 1,000, 67% complete, stored
- [ZelNum, $2,000 pack, Pay as you go, $2,000 top-up, POST /detect, iMessage Number Checker](https://datacircle.dev/validate-phone-apis/zelnum/2000-pack-pay-as-you-go-2000-top-up-post-detect-imessage-number-checker/llms.txt): $0.20 per 1,000, 11% complete
- [WasenderAPI, $6 monthly](https://datacircle.dev/validate-phone-apis/wasenderapi/6-monthly/llms.txt): $0.20 per 1,000, 0% 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 2026-11-08.

- https://osint.foundation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://osint.foundation/openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://osint.foundation/phone-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://osint.foundation/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://osint.foundation/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing