Port 4846Contamac ICM Service

Contamac ICM Service, a historic TCP/UDP assignment rarely seen in Internet scans.

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

Technical Details

what runs on :4846

Contamac ICM Service is registered on port :4846 over tcp and udp to Abdullah Obeid, assigned March 2008. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :4846

this machine

# linux
sudo ss -tulpn 'sport = :4846'

# macos / bsd
sudo lsof -nP -i :4846

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :4846

another host

nmap -sV -p T:4846 <host>
sudo nmap -sU -sV -p U:4846 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :4846

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 :4846 yet

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

Record

iana registry entry

port: :4846
service: Contamac ICM Service
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: This is the historic IANA assignment for the Contamac ICM Service on TCP and UDP port 4846. The entry is an alias of "contamac-icm", registered to Abdullah Obeid, and is rarely observed in internet-wide scans.
lookups: 0rank 993
added: 2026-09-06
updated: 2026-09-06
references: IANA service name registry — port 4846

Something wrong?

This record is maintained by the engineers who use port 4846. 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 2026-09-06.

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 :4846, by lookups.

port	service	proto	category	risk	views
:4899	Radmin Remote Administration	TCPUDP	Security	safe	28.3k
:4840	OPC UA TCP	TCPUDP	Network Services	caution	26.6k
:4843	OPC UA over TLS/SSL	TCPUDPtls	Security	caution	24.6k
:4847	Quadrion WebFresh	TCPUDP	Web Services	caution	7.2k
:4894	LysKOM	TCPUDP	Voice and Chat	caution	4.1k
:4800	Icona Instant Messenging System	TCPUDP	Voice and Chat	safe	0
:4801	Icona Web Embedded Chat	TCPUDP	Voice and Chat	safe	0
:4784	BFD Multihop Control	TCPUDP	Security	caution	0

risk mix of the 8 listed

safe38%
caution63%

1 of 8 encrypted

Port :4846Contamac ICM Service

Technical Details

Security Information

Related Ports

Port 4846Contamac ICM Service