Networkingflags: g

HTTP Status Code

Match 3-digit HTTP status codes in the 1xx–5xx range.

Try it in RegexPro →

Available in

JSSupported

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

PYSupported

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

GOSupported

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

regexengine-agnostic
\b[1-5]\d{2}\b   (flags: g)

Raw source: \b[1-5]\d{2}\b

How it works

Leading digit 1–5 covers all standard class codes (informational, success, redirect, client error, server error), followed by any two digits. Word boundaries prevent partial matches.

Examples

Input

HTTP 200 OK

Matches

  • 200

Input

Returned 404, then 500

Matches

  • 404
  • 500

Input

no codes here

No match

—

Common use cases

  • •Access log parsing
  • •Error rate dashboarding
  • •API test report aggregation
  • •Monitoring alerts on 5xx spikes

Related patterns

Domain Name

Networking

Match fully-qualified domain names like example.com or api.sub.example.co.uk.

FTP URL

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Match FTP and FTPS URLs, capturing optional credentials, host, port, and path.

Generic Connection String (URL Form)

Networking

Parse generic URL-form connection strings: `protocol://[user[:pass]@]host[:port][/database]`.

Hostname (Single Label, RFC 1123)

Networking

Validate a single-label hostname per RFC 1123: 1–63 chars, letters/digits/hyphens, can't start or end with hyphen.

Related concepts

Alternation with the | Operator

Concept

The pipe | matches either the expression on its left or on its right. Combine with groups to alternate over a subpattern.

How to Match Multiple Patterns (Alternation)

How-to

Combine patterns with | to match either option. Wrap alternatives in a group to scope the alternation correctly.

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