Networkingflags: g

TCP/UDP Port Number

Match port numbers (1–65535) following a colon, as you'd find in host:port strings.

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
:(6553[0-5]|655[0-2]\d|65[0-4]\d{2}|6[0-4]\d{3}|[1-5]?\d{1,4})\b   (flags: g)

Raw source: :(6553[0-5]|655[0-2]\d|65[0-4]\d{2}|6[0-4]\d{3}|[1-5]?\d{1,4})\b

How it works

The alternation enforces the 0–65535 range. Requires a leading colon for context, followed by a word boundary.

Examples

Input

http://localhost:8080

Matches

  • :8080

Input

db.example.com:5432

Matches

  • :5432

Input

api:65535

Matches

  • :65535

Common use cases

  • •Extracting ports from connection strings
  • •Configuration file validation
  • •Firewall rule parsing
  • •Service discovery tooling

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JDBC Connection URL

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Redis Connection URL

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