# Defastra, free: Phone validation API

> Risk scoring with real-time data enrichment for phone numbers.

Defastra's phone validation API on its Free credit plan. It costs $0.00 per 1,000 phones. It returns 5 of the 9 key fields we check: Number, Type, Carrier, Place, Risk.
We haven't run Defastra 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/defastra/free
- [Phone validation API: 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://docs.defastra.com/docs/how-defastra-pricing-works?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `POST https://api.defastra.com/deep_phone_check`
- API key: with the plan, on https://docs.defastra.com/docs/how-defastra-pricing-works?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://docs.defastra.com/reference/deep-phone-check?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: Defastra (https://defastra.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-03

## In the answer

- Completeness: 56%
- Number: ✓
- Type: ✓
- Carrier: ✓
- Place: ✓
- Risk: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Deep Email Check

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Risk scoring with real-time data enrichment for phone numbers.

## Data

- Freshness: live
- What it checks: numbering plan, carrier, messaging apps
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- You get: $2
- Enough for: about 28 calls, once

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: phone, Content-Type header "application/x-www-form-urlencoded". Optional: timeout, label
- Method: POST
- Path: /deep_phone_check

## About the plan

- Plan: Free credit
- Who can get it: anyone

## The 59 fields the plan's answer can hold

success, request ID, wallet balance, account balance, risk level, risk score, checks, check result type, check detail, phone type, prefix, number without prefix, carrier, country name, country code, country ISO 3 code, time zone, city, state, county, latitude, longitude, phone OS, profiles found, names found, breached, breach count, first breach date, what leaked, breaches, online profiles, service error, is registered, name, email, Facebook URL, picture, profile URL, country, hometown, first name, last name, gender, work, picture last modified, recovery method, multiple accounts, app language, location, registered at, Skype ID, birth date, username, last seen, is verified, about, is business, business name, business category

## Defastra's plans (6)

- [Defastra, free](https://datacircle.dev/validate-phone-apis/defastra/free/llms.txt): $0.00 per 1,000, 56% complete, live
- [Defastra, top-up, Pay as you go, first 5,000 requests a month](https://datacircle.dev/validate-phone-apis/defastra/top-up-pay-as-you-go-first-5000-requests-a-month/llms.txt): $70.00 per 1,000, 56% complete, live
- [Defastra, top-up, Pay as you go, next 15,000 requests a month](https://datacircle.dev/validate-phone-apis/defastra/top-up-pay-as-you-go-next-15000-requests-a-month/llms.txt): $60.00 per 1,000, 56% complete, live
- [Defastra, top-up, Pay as you go, next 30,000 requests a month](https://datacircle.dev/validate-phone-apis/defastra/top-up-pay-as-you-go-next-30000-requests-a-month/llms.txt): $55.00 per 1,000, 56% complete, live
- [Defastra, top-up, Pay as you go, next 50,000 requests a month](https://datacircle.dev/validate-phone-apis/defastra/top-up-pay-as-you-go-next-50000-requests-a-month/llms.txt): $50.00 per 1,000, 56% complete, live
- [Defastra, contact us](https://datacircle.dev/validate-phone-apis/defastra/contact-us/llms.txt): 56% complete, live

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

- `POST /deep_phone_check`: [Defastra, free](https://datacircle.dev/validate-phone-apis/defastra/free/llms.txt)

## Defastra's APIs (2)

- [Defastra: email verification API pricing, 6 plans](https://datacircle.dev/validate-email-apis/defastra/free/llms.txt)
- [Defastra: phone validation API pricing, 6 plans](https://datacircle.dev/validate-phone-apis/defastra/free/llms.txt)

## Defastra: phone validation API alternatives

- [Byteplant, $2,499.50 pack](https://datacircle.dev/validate-phone-apis/byteplant/2499-50-pack/llms.txt): $49.99 per 1,000, 56% complete, live
- [Loqate, $100 pack](https://datacircle.dev/validate-phone-apis/loqate/100-pack/llms.txt): $50.00 per 1,000, 78% complete, live
- [Listar, top-up from €1,000, Silver, POST /search/verify-phone-ownership](https://datacircle.dev/validate-phone-apis/listar/top-up-from-1000-silver-post-search-verify-phone-ownership/llms.txt): $50.639 per 1,000, 67% complete, live
- [Openapi.com, €45 monthly](https://datacircle.dev/validate-phone-apis/openapi-com/45-monthly/llms.txt): $50.639 per 1,000, 78% 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 2026-11-03.

- https://docs.defastra.com/docs/data-enrichment-introduction?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/docs/deep-phone-check-signals?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/docs/do-you-offer-custom-pricing-for-high-usage?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/docs/do-you-offer-trial?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/docs/fraud-prevention-introduction?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/docs/full-data-list?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/docs/how-defastra-pricing-works?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/docs/how-does-my-wallet-gets-debited?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/docs/response-time-timeout-settings?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/docs/what-is-a-batch?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/reference/authentication?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/reference/deep-phone-check?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.defastra.com/reference/error-handling?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing