Well-known · Cross-platform

995 POP3S

TCP Yes
UDP Yes
SCTP —
DCCP —

What it is

POP3 over implicit TLS/SSL.

When / why

Secure mailbox retrieval. Preferred over cleartext 110.

Protocol status detail

TransportStatusMeaning
TCP Yes Assigned by IANA and standardized, specified, or widely used on this port.
UDP Yes Assigned by IANA and standardized, specified, or widely used on this port.
SCTP — Not applicable for this transport.
DCCP — Not applicable for this transport.
« 994 IRCS (reserved) 1029 Microsoft DCOM »

Port range

Well-known (0–1023). System port for a core service. On Unix-like systems, binding it requires superuser privileges.

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