# Detect Disconnected Mobile Numbers: MNRL Check API | FastKYC

> Check whether an Indian mobile number appears on the Mobile Number Revocation List, flagging disconnected numbers before they are reassigned.

Source: https://www.fastkyc.com/apis/mnrl-check/

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[SMS APIs](/apis/sms/)

# MNRL Check API

Check whether an Indian mobile number appears on the Mobile Number Revocation List, flagging disconnected numbers before they are reassigned.

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Category

[SMS APIs](/apis/sms/)

Built for

-   [Telecom](/industries/telecom/)

## What the MNRL Check API does

MNRL Check tests a number against the Mobile Number Revocation List, the register of numbers disconnected by operators. Revoked numbers are eventually reissued to new subscribers.

This is the check that prevents a quietly serious failure: continuing to send OTPs, statements or transaction alerts to a number that now belongs to a stranger. Screening your base against MNRL turns that from an incident into routine hygiene.

## Where teams use the MNRL Check API

1.  Screening a customer base before an OTP or alert campaign
    
2.  Preventing sensitive messages reaching a reassigned number
    
3.  Cleaning stale contact data in a CRM
    
4.  Reducing wasted spend on undeliverable messages
    

## Frequently Asked Questions (FAQs)

What does a hit mean?

The number was disconnected and may already have been reissued. Stop sending to it and re-verify the customer through another channel.

How often should I run it?

Periodically across the base, and before any campaign carrying personal or financial information.

Does it say who holds the number now?

No. It reports revocation status only. Use mobile verification to establish who currently controls a number.

## Related APIs

-   [Blank Paper Validation API Detect whether an uploaded image is blank paper rather than a real document, catching failed captures before processing.](/apis/blank-paper-validation/)
-   [I4C Check API Check whether a mobile number is flagged as suspicious in the I4C cybercrime database, screening applicants for known fraud before you onboard them.](/apis/i4c-check/)
-   [KYC Document Classifier API Automatically identify whether an uploaded document is an Aadhaar, PAN, passport, voter ID or driving licence before extraction.](/apis/kyc-doc-classifier/)
-   [Mobile to GST API Find GST identification numbers linked to a mobile number, validated across government and financial registration databases.](/apis/mobile-to-gst/)

## Guides on the MNRL Check API

-   [GuideMobile Number Revocation: Regulations and Fraud PreventionUnderstand MNRL, mobile number revocation rules in India, and how revocation checks help businesses identify risks and strengthen customer verification.](/blog/mobile-number-revocation/)

## Start verifying with the MNRL Check API

Book a walkthrough and we will show the call, the response and how it fits your onboarding flow.

[Book a Demo](/book-demo/) [Browse All APIs](/apis/)

-   One API key for every check
-   Verified against official Indian records
-   Built for onboarding at scale