# BSG, contact us, Number Verifier, PUT /rest/hlr/check: Phone validation API

> Number Verifier is a real-time lookup service that checks whether a mobile number is active, identifies its current serving mobile operator, and determines if it’s reachable.

BSG's phone validation API on its Number Verifier plan. It returns 5 of the 9 key fields we check: Number, Validity, Carrier, Porting and roaming, Place.
We haven't run BSG through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
BSG gives this plan's price on request. 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/bsg/contact-us-number-verifier-put-rest-hlr-check
- [Phone validation API: 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://bsg.world/pricing-number-verifier?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `PUT https://api.bsg.world/rest/hlr/check`
- API key: with the plan, on https://bsg.world/pricing-number-verifier?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://bsg.world/developers/rest-api/hlr-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: BSG (https://bsg.world?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 56%
- Number: ✓
- Validity: ✓
- Carrier: ✓
- Porting and roaming: ✓
- Place: ✓

## Price

- Per: call
- Billing: contact

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Single Number Verifier request · Send bulk Number Verifier

## In their words

- Their pitch: Number Verifier is a real-time lookup service that checks whether a mobile number is active, identifies its current serving mobile operator, and determines if it’s reachable.

## Data

- Freshness: live
- Countries: Worldwide
- What it checks: carrier, line in service
- Keep data: no limit
- Use data: Any information and data received in connection with the provision of Services are strictly confidential and must not be disclosed or transferred to third parties, except in cases where the disclosure of such information to competent authorities is mandatory according to the law. [...] The User is not allowed to disclose any personal data of the Subscribers and information contained in the SMS to third parties, except as provided by law.

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: msisdn. Optional: tariff
- Method: PUT
- Path: /rest/hlr/check

## About the plan

- Plan: Number Verifier
- Who can get it: anyone of legal age with a BSG account

## The 18 fields the plan's answer can hold

ID, country name, operator brand, operator name, reference, phone, network, status, details, IMSI, ported, roaming, request created date, status date, price, currency, error code, error description

## BSG's plans (1)

- [BSG, contact us, Number Verifier, PUT /rest/hlr/check](https://datacircle.dev/validate-phone-apis/bsg/contact-us-number-verifier-put-rest-hlr-check/llms.txt): 56% complete, live

## BSG's calls (3)

- `PUT /rest/hlr/check`: [BSG, contact us, Number Verifier, PUT /rest/hlr/check](https://datacircle.dev/validate-phone-apis/bsg/contact-us-number-verifier-put-rest-hlr-check/llms.txt)
- `PUT /rest/hlr/create`, Send bulk Number Verifier: [BSG, contact us, Number Verifier, PUT /rest/hlr/create, Send bulk Number Verifier](https://datacircle.dev/validate-phone-apis/bsg/contact-us-number-verifier-put-rest-hlr-create-send-bulk-number-verifier/llms.txt)
- `PUT /rest/hlr/create`, Single Number Verifier request: [BSG, contact us, Number Verifier, PUT /rest/hlr/create, Single Number Verifier request](https://datacircle.dev/validate-phone-apis/bsg/contact-us-number-verifier-put-rest-hlr-create-single-number-verifier-request/llms.txt)

## BSG's APIs (1)

- [BSG: phone validation API pricing, 1 plan, PUT /rest/hlr/check](https://datacircle.dev/validate-phone-apis/bsg/contact-us-number-verifier-put-rest-hlr-check/llms.txt)

## BSG: phone validation API alternatives

- [Foxentry, contact us, Above 100 000 req / month, POST /phone/validate, Validate phone number (extended)](https://datacircle.dev/validate-phone-apis/foxentry/contact-us-above-100-000-req-month-post-phone-validate-validate-phone-number-extended/llms.txt): 56% complete, live
- [HLR Lookups, contact us, Postpaid account, POST /hlr-lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/contact-us-postpaid-account-post-hlr-lookups/llms.txt): 56% complete, live
- [Data8, contact us, Bespoke deals, POST /PhoneValidation/IsValid.json, IsValid](https://datacircle.dev/validate-phone-apis/data8/contact-us/llms.txt): 56% complete, live
- [Byteplant, contact us](https://datacircle.dev/validate-phone-apis/byteplant/contact-us/llms.txt): 56% 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 2026-11-02.

- https://bsg.world/developers/rest-api/hlr-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://bsg.world/number-verifier?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://bsg.world/pricing-number-verifier?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://bsg.world/terms-and-conditions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.bsg.dev/api/api-v.1.0/number-verifier.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://docs.bsg.dev/api/balance-management/balance/get-tariffs.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing