Port 4800Icona Instant Messenging System

TCP/UDP port 4800 is assigned to the Icona Instant Messenging System.

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

also known as iims

Technical Details

what runs on :4800

Icona Instant Messenging System is registered on port :4800 over tcp and udp. 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 :4800

this machine

# linux
sudo ss -tulpn 'sport = :4800'

# macos / bsd
sudo lsof -nP -i :4800

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :4800

another host

nmap -sV -p T:4800 <host>
sudo nmap -sU -sV -p U:4800 <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 :4800

risk score

1/ 10safe

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

voice and chat averages 3.5 across 165 ports — this one sits 2.5 below.

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 :4800 yet

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

Record

iana registry entry

port: :4800
service: Icona Instant Messenging System
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Voice and Chat
usage: The IANA assignment identifies TCP and UDP port 4800 for the Icona Instant Messenging System. No registrant or additional deployment information is recorded, and the service is rarely observed open on the public Internet.
lookups: 0rank 993
added: 2026-09-06
updated: 2026-09-06
references: IANA service name registry — port 4800

Something wrong?

This record is maintained by the engineers who use port 4800. 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

all 165 in voice and chat →

the 8 most looked-up other ports in voice and chat — 165 ports carry that label.

port	service	proto	category	risk	views
:9090	Openfire Admin Console	TCP	Web Services	caution	34.2k
:1513	Garena Gaming	TCPUDP	Gaming	caution	33.1k
:9091	Openfire Admin Console (SSL)	TCPtls	Web Services	caution	28.3k
:2031	Mobrien Chat	TCPUDP	Web Services	caution	27.7k
:1720	H.323 Signaling	TCP	Network Services	caution	26.5k
:6005	Camfrog Chat	TCP	Voice and Chat	caution	25.2k
:3001	Miralix Phone Monitor	TCP	Network Services	caution	21.7k
:9009	Pichat Server	TCPUDP	Network Services	caution	19.7k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :4800Icona Instant Messenging System

Technical Details

Security Information

Related Ports

Port 4800Icona Instant Messenging System