NetOpsT

SECURITY / TOOL

Port Lookup

Look up common TCP and UDP ports and their services.

Runs locally

SECURITY

TCP/UDP Port Lookup

Port Lookup

Common infrastructure services.

20/21FTPTCP

File transfer

22SSHTCP

Secure shell

25SMTPTCP

Mail transfer

53DNSTCP/UDP

Name resolution

67/68DHCPUDP

Address assignment

80HTTPTCP

Web traffic

123NTPUDP

Time sync

161/162SNMPUDP

Monitoring

389LDAPTCP/UDP

Directory

443HTTPSTCP

Secure web

445SMBTCP

File sharing

636LDAPSTCP

Secure LDAP

1433MSSQLTCP

SQL Server

3389RDPTCP/UDP

Remote

Security TOOL

Port Lookup

Look up common TCP and UDP ports and their services.

When to use this tool

Use it when troubleshooting connectivity or documenting a firewall request.

Use it in three steps

  1. Search by port number or service name.
  2. Review the calculated values against your environment and its requirements.
  3. Copy or document the result only after validating it for production use.

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