ICCID (SIM Card Serial Number) Regex for JavaScript

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching iccid (sim card serial number), ported and verified for JavaScript. 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 JavaScript project — whether you're validating in an Express middleware, a Next.js API route, or a client-side form.

Javascript Implementation

// ICCID (SIM Card Serial Number)
// ReDoS-safe | RegexVault — Identity & PII > Digital Identity

const iccidSimCardSerialNumberRegex = /^[0-9]{18,22}[F]?$/;

function validateIccidSimCardSerialNumber(input: string): boolean {
  return iccidSimCardSerialNumberRegex.test(input);
}

// Example
console.log(validateIccidSimCardSerialNumber("896491061700000001")); // 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 JavaScript developers because especially critical in long-running Node.js event loops where a ReDoS vulnerability can block the entire process. 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

ICCID structure: 89 (telecom industry code) + country code + carrier code + individual account ID + Luhn check digit. Some ICCIDs end in F (filler). Length varies: 18-22 digits. Identifies the SIM card, not the subscriber (MSISDN/phone number).