Port 183OCBinder

OCBinder is the IANA-registered service name for TCP and UDP port 183, but its protocol and deployment are undocumented.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

Technical Details

what runs on :183

no technical write-up for :183 yet

the handshake, the implementations you meet in the wild, the flags that matter. we have the registry entry — the detail comes from the engineers who run it.

add technical details

Security Information

exposure of :183

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

no security notes recorded for :183 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :183
service: OCBinder
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 183 to OCBinder, with no registrant recorded. There is no authoritative public information identifying the software or deployments that use it.
lookups: 0rank 994
added: 2026-08-26
updated: 2026-08-26
references: IANA service name registry — port 183

Something wrong?

This record is maintained by the engineers who use port 183. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-08-26.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :183, by lookups.

port	service	proto	category	risk	views
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:143	IMAP	TCPUDP	Email	caution	20.7k
:201	AppleTalk Routing	TCPUDP	Network Services	caution	19.7k
:194	Internet Relay Chat	TCPUDP	Voice and Chat	caution	17.5k
:135	DCE/RPC Endpoint Mapper	TCPUDP	Remote Access	caution	16.7k
:213	IPX	TCPUDP	Network Services	caution	13.9k
:139	NetBIOS Session Service	TCPUDP	File Transfer	caution	13.3k
:123	Network Time Protocol	UDP	Network Services	safe	13.2k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :183OCBinder

Technical Details

Security Information

Related Ports

Port 183OCBinder