# SMSBOX, free: Phone validation API

> Clean up your database and remove invalid or unavailable numbers with Number Validation.

SMSBOX's Free test credits plan for the phone validation API costs $0.00 per 1,000 phones. We check each provider's docs for 9 fields. SMSBOX's docs list 4: Number, Validity, Type, Porting and roaming.
We haven't run SMSBOX through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 1,342 plans for phone validation APIs by price. Half the plans cost $3.867 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. [Keyronne's pay-as-you-go plan](https://datacircle.dev/validate-phone-apis/keyronne/pay-as-you-go/llms.txt) costs the least for 10,000 phones a month: $0.20.
[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), [Signal House](https://datacircle.dev/validate-phone-apis/signal-house/top-up-from-10/llms.txt) and [Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/smsbox/free
- [Phone validation API in 2026: the best of 60+ compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://www.smsbox.be/en/sms-prices?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `GET https://core.smsbox.be/api/v1/hlr`
- API key: with the plan, on https://www.smsbox.be/en/sms-prices?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://www.smsbox.be/en/api-documentation/reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: SMSBOX (https://www.smsbox.be?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 44%
- Number: ✓
- Validity: ✓
- Type: ✓
- Porting and roaming: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Send SMS message (V2) · Send WhatsApp Business message (on request) · Send a voice message · Send OTP (V2) · Send a Microsoft Teams message

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Clean up your database and remove invalid or unavailable numbers with Number Validation.

## Data

- Freshness: live
- What it checks: carrier, line in service
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: €0
- You get: 8 credits
- Enough for: 32 calls

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: number
- Method: GET
- Path: /v1/hlr

## About the plan

- Plan: Free test credits
- Who can get it: new customers, once only (free account, no credit card)

## The 22 fields the plan's answer can hold

result code, issuing network verified, issuing network time zone, issuing network location, issuing network name, issuing network country code, issuing network area, home network verified, home network time zone, home network location, home network name, home network country code, home network area, line type, MSISDN, error code, error text, status, MCCMNC, ported, roaming, phone number

## SMSBOX's plans (9)

- [SMSBOX, free](https://datacircle.dev/validate-phone-apis/smsbox/free/llms.txt): $0.00 per 1,000, 44% complete, live
- [SMSBOX, top-up from €24.75](https://datacircle.dev/validate-phone-apis/smsbox/top-up-from-24-75/llms.txt): $27.851 per 1,000, 44% complete, live
- [SMSBOX, top-up from €47](https://datacircle.dev/validate-phone-apis/smsbox/top-up-from-47/llms.txt): $26.445 per 1,000, 44% complete, live
- [SMSBOX, top-up from €89](https://datacircle.dev/validate-phone-apis/smsbox/top-up-from-89/llms.txt): $25.038 per 1,000, 44% complete, live
- [SMSBOX, top-up from €420](https://datacircle.dev/validate-phone-apis/smsbox/top-up-from-420/llms.txt): $23.631 per 1,000, 44% complete, live
- [SMSBOX, top-up from €790](https://datacircle.dev/validate-phone-apis/smsbox/top-up-from-790/llms.txt): $22.225 per 1,000, 44% complete, live
- [SMSBOX, top-up from €1,725](https://datacircle.dev/validate-phone-apis/smsbox/top-up-from-1725/llms.txt): $19.411 per 1,000, 44% complete, live
- [SMSBOX, top-up from €3,200](https://datacircle.dev/validate-phone-apis/smsbox/top-up-from-3200/llms.txt): $18.005 per 1,000, 44% complete, live
- [SMSBOX, contact us](https://datacircle.dev/validate-phone-apis/smsbox/contact-us/llms.txt): 44% complete, live

## SMSBOX's calls (1)

- `GET /v1/hlr`: [SMSBOX, free](https://datacircle.dev/validate-phone-apis/smsbox/free/llms.txt)

## SMSBOX's APIs (1)

- [SMSBOX: phone validation API pricing, 9 plans](https://datacircle.dev/validate-phone-apis/smsbox/free/llms.txt)

## SMSBOX: phone validation API alternatives

- [SMSC.ru, top-up from ₽10,000, Tariff plan 5, Russia, all operators](https://datacircle.dev/validate-phone-apis/smsc-ru/top-up-from-10000-tariff-plan-5-russia-all-operators/llms.txt): $17.909 per 1,000, 56% complete, live
- [SMSC.kz, top-up from ₸15,000, Tariff plan 3, Russia, all operators](https://datacircle.dev/validate-phone-apis/smsc-kz/top-up-from-15000-tariff-plan-3-russia-all-operators/llms.txt): $17.945 per 1,000, 56% complete, live
- [Listar, top-up from €10,000, Gold, POST /search/verify-whatsapp](https://datacircle.dev/validate-phone-apis/listar/top-up-from-10000-gold-post-search-verify-whatsapp/llms.txt): $18.005 per 1,000, 22% complete, live
- [Openapi.com, €10,000 yearly](https://datacircle.dev/validate-phone-apis/openapi-com/10000-yearly/llms.txt): $18.005 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 2026-11-08.

- https://www.smsbox.be/docs/openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.smsbox.be/en/api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.smsbox.be/en/api-documentation/reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.smsbox.be/en/number-validation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.smsbox.be/en/sms-prices?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.smsbox.be/en/specific-terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.smsbox.be/en/terms-and-conditions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.smsbox.be/en/test-credits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.smsbox.be/hlr-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing