Port 53 is used for the Domain Name System (DNS) protocol. It is responsible for translating domain names into IP addresses, and vice versa, to ensure that internet traffic is properly routed between devices.
Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.
Official
Port |
Protocol (TCP/UDP) |
Title |
Description |
Port Type |
Port 53 |
tcp |
domain |
Domain Name Server |
WELL KNOWN PORT |
Port 53 |
udp |
domain |
Domain Name Server |
WELL KNOWN PORT |
UnOfficial
Unofficialy or sometimes with conflict, the same port may be used by different applications.
Port | Protocol (TCP/UDP) | Description |