Port 4331KeyTicket Event Management and Ticketing REST API

TCP port 4331 is assigned to KeyTicket’s REST API for event management and ticketing systems, including embedded POS devices.

inWeb Services

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

also known as ktickets-rest

Technical Details

what runs on :4331

KeyTicket Event Management and Ticketing REST API is registered on port :4331 over tcp to KeyTicket Solutions, assigned April 2014. 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 never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :4331

this machine

# linux
sudo ss -tlpn 'sport = :4331'

# macos / bsd
sudo lsof -nP -i :4331

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :4331

another host

nmap -sV -p T:4331 <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 :4331

risk score

1/ 10safe

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

web services averages 3.1 across 191 ports — this one sits 2.1 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

every listening transport is another surface to filter at the edge

security overview

no security notes recorded for :4331 yet

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

Record

iana registry entry

port: :4331
service: KeyTicket Event Management and Ticketing REST API
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Web Services
usage: The IANA assignment describes a REST API for KeyTicket event management and ticketing systems, including embedded POS devices. It is registered to KeyTicket Solutions; no broader deployment pattern is established here.
lookups: 0rank 993
added: 2026-10-04
updated: 2026-10-04
references: IANA service name registry — port 4331

Something wrong?

This record is maintained by the engineers who use port 4331. 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 2026-10-04.

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 191 in web services →

the 8 most looked-up other ports in web services — 191 ports carry that label.

port	service	proto	category	risk	views
:8888	Sun Answerbook & Alt HTTP	TCP	Web Services	caution	123.9k
:8000	Intel Remote Desktop / Alternate HTTP Port	TCP	Web Services	safe	84.3k
:8888	NewsEDGE	TCPUDP	Web Services	caution	83.3k
:8888	HTTP Alternative Port	TCP	Web Services	caution	76.5k
:8888	GNUmp3d Streaming HTTP	TCP	Web Services	caution	76.3k
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:80	HTTP	TCPUDP	Web Services	caution	67.3k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :4331KeyTicket Event Management and Ticketing REST API

Technical Details

Security Information

Related Ports

Port 4331KeyTicket Event Management and Ticketing REST API