Bank Account Number (Generic Sensitive) Regex for Go

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching bank account number (generic sensitive), 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

// Bank Account Number (Generic Sensitive)
// ReDoS-safe | RegexVault — Identity & PII > Financial PII

package validation

import "regexp"

var bankAccountNumberGenericSensitiveRe = regexp.MustCompile(`^[0-9]{6,18}$`)

func ValidateBankAccountNumberGenericSensitive(s string) bool {
    return bankAccountNumberGenericSensitiveRe.MatchString(s)
}

// Example
// fmt.Println(ValidateBankAccountNumberGenericSensitive("123456")) // true

Test Cases

When to use this pattern

This pattern is drawn from the Identity & PII > Financial PII 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

Bank account numbers vary widely by country: UK 8 digits, US 5-17 digits, Singapore 9-12 digits, India 11-16 digits. This pattern covers the practical range. Always combine with routing/sort code for unambiguous bank identification.