Port Number Lookup

Search common TCP and UDP port numbers and the services that use them — 22 SSH, 443 HTTPS, 5432 PostgreSQL and more.

Port	Service	Protocol	What it is used for
20	FTP data	TCP	File transfer — data channel
21	FTP	TCP	File transfer — control (unencrypted)
22	SSH / SFTP	TCP	Secure shell and secure file transfer
23	Telnet	TCP	Unencrypted remote login — avoid
25	SMTP	TCP	Sending email between servers
53	DNS	TCP/UDP	Domain name lookups
67/68	DHCP	UDP	Automatic IP address assignment
69	TFTP	UDP	Trivial file transfer
80	HTTP	TCP	Web traffic (unencrypted)
110	POP3	TCP	Receiving email
119	NNTP	TCP	Usenet news
123	NTP	UDP	Time synchronisation
135	MS RPC	TCP	Windows remote procedure calls
137-139	NetBIOS	TCP/UDP	Windows name and file sharing (legacy)
143	IMAP	TCP	Reading email on a server
161/162	SNMP	UDP	Network device monitoring
179	BGP	TCP	Internet routing
389	LDAP	TCP	Directory services
443	HTTPS	TCP	Secure web traffic
445	SMB	TCP	Windows file sharing
465	SMTPS	TCP	Secure email submission (implicit TLS)
514	Syslog	UDP	System logs
587	SMTP submission	TCP	Sending email from clients (STARTTLS)
636	LDAPS	TCP	Secure LDAP
993	IMAPS	TCP	Secure IMAP
995	POP3S	TCP	Secure POP3
1080	SOCKS	TCP	SOCKS proxy
1194	OpenVPN	UDP/TCP	VPN
1433	SQL Server	TCP	Microsoft SQL Server
1521	Oracle DB	TCP	Oracle database listener
1723	PPTP	TCP	VPN (legacy)
2049	NFS	TCP/UDP	Network file system
2181	ZooKeeper	TCP	Apache ZooKeeper
2375/2376	Docker	TCP	Docker daemon (plain/TLS)
3000	Dev servers	TCP	Common for Node, React and Rails apps
3306	MySQL / MariaDB	TCP	Database
3389	RDP	TCP	Windows Remote Desktop
4200	Angular dev	TCP	Angular CLI development server
5000	Flask / dev	TCP	Common for Flask and other dev servers
5173	Vite dev	TCP	Vite development server
5432	PostgreSQL	TCP	Database
5601	Kibana	TCP	Elastic dashboards
5672	RabbitMQ	TCP	AMQP message broker
5900	VNC	TCP	Remote desktop
6379	Redis	TCP	In-memory data store
6443	Kubernetes API	TCP	Kubernetes API server
8000	Dev servers	TCP	Common for Django and other dev servers
8080	HTTP alternate	TCP	Proxies and app servers
8443	HTTPS alternate	TCP	Alternative secure web port
8888	Jupyter	TCP	Jupyter notebooks
9000	SonarQube / PHP-FPM	TCP	Various tools
9090	Prometheus	TCP	Metrics server
9092	Kafka	TCP	Apache Kafka broker
9200	Elasticsearch	TCP	Search REST API
9300	Elasticsearch	TCP	Cluster transport
11211	Memcached	TCP/UDP	Cache server
15672	RabbitMQ UI	TCP	RabbitMQ management
27017	MongoDB	TCP	Database
50000	Jenkins agents / DB2	TCP	Various tools

Common default ports. Software can be configured to use any port, so a port number alone doesn't prove what is running.

About port number lookup

Ports let one computer run many network services. Each service listens on a numbered port.

Common ports

80 HTTP, 443 HTTPS, 22 SSH, 21 FTP.
25 / 587 SMTP, 143 / 993 IMAP, 110 / 995 POP3.
3306 MySQL, 5432 PostgreSQL, 6379 Redis, 27017 MongoDB.

Security

Only open the ports you need. Databases should not be exposed to the open internet.

Runs in your browser

Calculations on this page happen on your device. Nothing you enter is uploaded.

A worked example

Searching 3306 shows MySQL and 5432 shows PostgreSQL. Port 22 is SSH, 443 is HTTPS and 25 is SMTP. Ports below 1024 are well-known and normally need administrator rights to listen on, while 49152 and above are used for short-lived connections.

Security tips

Close ports you do not need.
Do not expose databases or admin tools to the whole internet.
Use a firewall or security group to allow only trusted addresses.

How to use port number lookup

1Type in the search boxSearch by name, code or keyword.

2Scan the tableThe list narrows as you type.

3Use the answerNote or copy what you need.

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Read the full privacy policy.

Questions people ask

No. Software can use any port; these are the usual defaults.

TCP guarantees delivery and order; UDP is faster but doesn't.

No. Everything is worked out in your browser and nothing you type is sent to a server.

HTTP Header Analyzer A Record Lookup AAAA Record Lookup MX Record Lookup Pincode Finder Favicon Generator / Checker DNS Lookup Domain Availability Checker

Port

Service

Protocol

What it is used for

FTP data

TCP

File transfer — data channel

FTP

TCP

File transfer — control (unencrypted)

SSH / SFTP

TCP

Secure shell and secure file transfer

Telnet

TCP

Unencrypted remote login — avoid

SMTP

TCP

Sending email between servers

DNS

TCP/UDP

Domain name lookups

67/68

DHCP

UDP

Automatic IP address assignment

TFTP

UDP

Trivial file transfer

HTTP

TCP

Web traffic (unencrypted)

110

POP3

TCP

Receiving email

119

NNTP

TCP

Usenet news

123

NTP

UDP

Time synchronisation

135

MS RPC

TCP

Windows remote procedure calls

137-139

NetBIOS

TCP/UDP

Windows name and file sharing (legacy)

143

IMAP

TCP

Reading email on a server

161/162

SNMP

UDP

Network device monitoring

179

BGP

TCP

Internet routing

389

LDAP

TCP

Directory services

443

HTTPS

TCP

Secure web traffic

445

SMB

TCP

Windows file sharing

465

SMTPS

TCP

Secure email submission (implicit TLS)

514

Syslog

UDP

System logs

587

SMTP submission

TCP

Sending email from clients (STARTTLS)

636

LDAPS

TCP

Secure LDAP

993

IMAPS

TCP

Secure IMAP

995

POP3S

TCP

Secure POP3

1080

SOCKS

TCP

SOCKS proxy

1194

OpenVPN

UDP/TCP

VPN

1433

SQL Server

TCP

Microsoft SQL Server

1521

Oracle DB

TCP

Oracle database listener

1723

PPTP

TCP

VPN (legacy)

2049

NFS

TCP/UDP

Network file system

2181

ZooKeeper

TCP

Apache ZooKeeper

2375/2376

Docker

TCP

Docker daemon (plain/TLS)

3000

Dev servers

TCP

Common for Node, React and Rails apps

3306

MySQL / MariaDB

TCP

Database

3389

RDP

TCP

Windows Remote Desktop

4200

Angular dev

TCP

Angular CLI development server

5000

Flask / dev

TCP

Common for Flask and other dev servers

5173

Vite dev

TCP

Vite development server

5432

PostgreSQL

TCP

Database

5601

Kibana

TCP

Elastic dashboards

5672

RabbitMQ

TCP

AMQP message broker

5900

VNC

TCP

Remote desktop

6379

Redis

TCP

In-memory data store

6443

Kubernetes API

TCP

Kubernetes API server

8000

Dev servers

TCP

Common for Django and other dev servers

8080

HTTP alternate

TCP

Proxies and app servers

8443

HTTPS alternate

TCP

Alternative secure web port

8888

Jupyter

TCP

Jupyter notebooks

9000

SonarQube / PHP-FPM

TCP

Various tools

9090

Prometheus

TCP

Metrics server

9092

Kafka

TCP

Apache Kafka broker

9200

Elasticsearch

TCP

Search REST API

9300

Elasticsearch

TCP

Cluster transport

11211

Memcached

TCP/UDP

Cache server

15672

RabbitMQ UI

TCP

RabbitMQ management

27017

MongoDB

TCP

Database

50000

Jenkins agents / DB2

TCP

Various tools

About port number lookup

Ports let one computer run many network services. Each service listens on a numbered port.

Common ports

80 HTTP, 443 HTTPS, 22 SSH, 21 FTP.
25 / 587 SMTP, 143 / 993 IMAP, 110 / 995 POP3.
3306 MySQL, 5432 PostgreSQL, 6379 Redis, 27017 MongoDB.

Security

Only open the ports you need. Databases should not be exposed to the open internet.

Runs in your browser

Calculations on this page happen on your device. Nothing you enter is uploaded.

A worked example

Security tips

Close ports you do not need.
Do not expose databases or admin tools to the whole internet.
Use a firewall or security group to allow only trusted addresses.

Questions people ask

No. Software can use any port; these are the usual defaults.

TCP guarantees delivery and order; UDP is faster but doesn't.

No. Everything is worked out in your browser and nothing you type is sent to a server.

Port Number Lookup

About port number lookup

Common ports

Security

Runs in your browser

A worked example

Security tips

How to use port number lookup

Your privacy on this tool

Questions people ask

More tools you may like

Port Number Lookup

About port number lookup

Common ports

Security

Runs in your browser

A worked example

Security tips

How to use port number lookup

Your privacy on this tool

Questions people ask

More tools you may like