ICCID (SIM Card Serial Number) Regex for Go

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching iccid (sim card serial number), ported and verified for Go. 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 Go project — whether you're validating in a Gin handler, a gRPC service, or a command-line tool.

Go Implementation

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

package validation

import "regexp"

var iccidSimCardSerialNumberRe = regexp.MustCompile(`^[0-9]{18,22}[F]?$`)

func ValidateIccidSimCardSerialNumber(s string) bool {
    return iccidSimCardSerialNumberRe.MatchString(s)
}

// Example
// fmt.Println(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 Go developers because Go's RE2 engine is inherently safe from catastrophic backtracking, but this pattern has been additionally verified for correctness. 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).