Port Number Reference

Common TCP/UDP ports lookup

46 ports

20

FTP-DATA TCP

FTP data transfer

21

FTP TCP

FTP control

22

SSH TCP

Secure Shell — remote login, SFTP, tunnels

23

Telnet TCP

Unencrypted remote login (legacy)

25

SMTP TCP

Mail transfer between servers

53

DNS TCP/UDP

Domain name resolution

67

DHCP UDP

DHCP server

68

DHCP UDP

DHCP client

69

TFTP UDP

Trivial file transfer

80

HTTP TCP

Web traffic (unencrypted)

110

POP3 TCP

Mail retrieval (legacy)

123

NTP UDP

Network time sync

143

IMAP TCP

Mail retrieval

161

SNMP UDP

Network device monitoring

389

LDAP TCP/UDP

Directory services

443

HTTPS TCP

Web traffic over TLS

445

SMB TCP

Windows file sharing

465

SMTPS TCP

Mail submission over TLS

587

SMTP TCP

Mail submission (STARTTLS)

593

RPC TCP

Microsoft RPC over HTTP

636

LDAPS TCP

LDAP over TLS

853

DoT TCP

DNS over TLS

993

IMAPS TCP

IMAP over TLS

995

POP3S TCP

POP3 over TLS

1080

SOCKS TCP

SOCKS proxy

1194

OpenVPN TCP/UDP

VPN tunnels

1433

MSSQL TCP

Microsoft SQL Server

1521

Oracle TCP

Oracle database

2049

NFS TCP/UDP

Network file system

3000

Dev server TCP

Node/Rails/Next.js default dev port

3306

MySQL TCP

MySQL / MariaDB database

3389

RDP TCP

Windows Remote Desktop

4200

Angular TCP

Angular dev server

5173

Vite TCP

Vite dev server

5432

PostgreSQL TCP

PostgreSQL database

5672

AMQP TCP

RabbitMQ message broker

5900

VNC TCP

VNC remote desktop

6379

Redis TCP

Redis key-value store

8000

Dev server TCP

Django/Python default dev port

8080

HTTP-alt TCP

Alternate HTTP / proxies / Tomcat

8443

HTTPS-alt TCP

Alternate HTTPS

9000

PHP-FPM TCP

PHP FastCGI / SonarQube

9090

Prometheus TCP

Prometheus monitoring

9200

Elasticsearch TCP

Elasticsearch REST API

11211

Memcached TCP/UDP

Memcached cache

27017

MongoDB TCP

MongoDB database

0–1023 well-known · 1024–49151 registered · 49152–65535 dynamic/ephemeral.

Loading tool…

About the Port Number Reference

Quick reference for 45+ common TCP/UDP port numbers: SSH 22, HTTPS 443, PostgreSQL 5432, Redis 6379, plus dev-server defaults like 3000 and 5173. Search by number, protocol name, or service — with a reminder of the well-known/registered/dynamic ranges.

How to use

1Search by port number or service name.
2Read what runs there and over which protocol.

Related Network & API tools

HTTP Status Codes cURL Builder Mock Data Generator IP Lookup DNS Lookup Ping (fetch)

Port Number Reference is part of DevKit — 100 free, privacy-first tools for developers, students, and everyone, built by Minhazul Ashim. Everything runs in your browser; your data never leaves your machine.