# ICCID Validator

Validate ICCID numbers for SIM cards with Luhn checksum and issuer analysis

> Canonical page: https://elysiatools.com/en/tools/iccid-validator

- **Category:** Validation

- **Keywords:** iccid, validator, sim, card, identification, checksum, luhn, issuer

## Overview

The ICCID Validator is a precise utility designed to verify the integrity and origin of SIM card identification numbers. By performing a Luhn algorithm checksum calculation and decoding the issuer identification digits, this tool ensures your 19-20 digit ICCID strings are valid and correctly formatted.

## Inputs

- **ICCID Number** (text): Enter a 19-20 digit ICCID number (with or without separators)

## When to use

- Verify the authenticity of a SIM card ICCID before activation or registration.
- Identify the mobile network operator or issuer associated with a specific SIM card.
- Troubleshoot connectivity issues by confirming the ICCID structure is standard and error-free.

## How it works

- Input your 19 or 20-digit ICCID number into the validation field.
- The tool strips any spaces or separators to normalize the input string.
- The system performs a Luhn checksum validation to detect potential transcription errors.
- The tool parses the issuer identification digits to provide details about the card's origin.

## Use cases

- Telecom technicians verifying SIM inventory before deployment.
- Developers building mobile device management systems requiring valid SIM input.
- Users troubleshooting SIM card recognition issues on mobile devices.

## Frequently asked questions

### What is an ICCID?

ICCID stands for Integrated Circuit Card Identifier. It is a unique 19-20 digit serial number used to identify a specific SIM card globally.

### Does this tool store my ICCID?

No, this tool processes your input locally and does not store or log any ICCID numbers provided.

### Why does my ICCID fail validation?

Validation failure usually indicates a typo, an incorrect number of digits, or a failure to pass the Luhn checksum algorithm.

### Can this tool track the location of a SIM card?

No, the ICCID only identifies the SIM card and its issuer; it does not contain real-time location or user data.

### What format should I use for the input?

You can enter the number as a continuous string or with spaces; the validator automatically handles both formats.

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## Samples

- [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion
- [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion
- [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion
- [Web Image Processing Rust Samples](https://elysiatools.com/en/samples/web-image-processing-rust): Web Rust image processing examples including image read/save, scaling, and format conversion

## Related content

- [Check-Digit and Checksum Validation](https://elysiatools.com/en/hubs/check-digit-checksum-validation): Normalize an identifier, select its specified checksum path, and verify format before accepting it.