IMEI Number (Mobile Device) Regex for Java

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching imei number (mobile device), ported and verified for Java. Identity and credential patterns need both correctness and safety, since they're frequent targets for adversarial input. The snippet below is ready to drop into your Java project — whether you're validating in a Spring Boot controller, a Jakarta EE service, or a standalone utility class.

Java Implementation

// IMEI Number (Mobile Device)
// ReDoS-safe | RegexVault — Identity & PII > Digital Identity

import java.util.regex.Pattern;

public class ImeiNumberMobileDeviceValidator {
    private static final Pattern PATTERN =
        Pattern.compile("^[0-9]{15}$");

    public static boolean validate(String input) {
        return PATTERN.matcher(input).matches();
    }

    // Example
    public static void main(String[] args) {
        System.out.println(validate("356938035643809")); // true
    }
}

Test Cases

When to use this pattern

This pattern is drawn from the Identity & PII > Digital Identity category and carries a ReDoS-safe certification. That matters for Java developers because critical in Java applications since the JVM regex engine uses backtracking and is susceptible to ReDoS without careful pattern design. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

IMEI structure: 8-digit TAC (Type Allocation Code, identifies manufacturer/model) + 6-digit serial number + 1 Luhn check digit. IMEI2 is used for dual-SIM devices. IMEISV is 16 digits (includes software version). Always validate Luhn checksum.