Port 3969Landmark Messages

IANA-assigned TCP and UDP port for Landmark Messages.

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

also known as landmarks

Technical Details

what runs on :3969

Landmark Messages is registered on port :3969 over tcp and udp to Petri Rauhala, assigned August 2005. 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 :3969

this machine

# linux
sudo ss -tulpn 'sport = :3969'

# macos / bsd
sudo lsof -nP -i :3969

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3969

another host

nmap -sV -p T:3969 <host>
sudo nmap -sU -sV -p U:3969 <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 :3969

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 :3969 yet

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

Record

iana registry entry

port: :3969
service: Landmark Messages
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: Port 3969 is assigned for Landmark Messages over TCP and UDP. The assignment was registered by Petri Rauhala in 2005; public protocol and product details are not established here.
lookups: 0rank 993
added: 2026-09-09
updated: 2026-09-09
references: IANA service name registry — port 3969

Something wrong?

This record is maintained by the engineers who use port 3969. 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 2026-09-09.

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 :3969, by lookups.

port	service	proto	category	risk	views
:3978	OpenTTD Master Server	TCPUDP	Gaming	caution	12.5k
:3999	Norman Scanning Service	TCPUDP	Security	caution	9.9k
:4007	PrintBuzzer Socket Server	TCP	Network Services	caution	8.2k
:4001	Microsoft Ants	TCP	Gaming	caution	7.7k
:3945	EMCADS	TCPUDP	Security	caution	7.6k
:4018	Protocol Info & Warnings	TCPUDP	Network Services	caution	6.7k
:3979	OpenTTD	TCPUDP	Gaming	caution	4.4k
:4000	Diablo II	TCPUDP	Gaming	caution	4.3k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :3969Landmark Messages

Technical Details

Security Information

Related Ports

Port 3969Landmark Messages