Port 689NMAP

IANA-registered NMAP service assigned to TCP and UDP port 689.

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

Technical Details

what runs on :689

no technical write-up for :689 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 :689

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 :689 yet

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

Record

iana registry entry

port: :689
service: NMAP
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns the NMAP service name to TCP and UDP port 689, registered to Peter Dennis Bartok. This assignment should not be confused with the widely known Nmap network scanner, which does not normally listen on port 689.
lookups: 0rank 994
added: 2026-08-21
updated: 2026-08-21
references: IANA service name registry — port 689

Something wrong?

This record is maintained by the engineers who use port 689. 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 2026-08-21.

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 :689, by lookups.

port	service	proto	category	risk	views
:660	Mac OS X Server Admin	TCP	Remote Access	caution	23.7k
:749	Kerberos Admin	TCPUDP	Security	safe	23.6k
:636	LDAPS	TCPUDPtls	Security	caution	15.6k
:712	TBRPF Protocol	TCP	Network Services	caution	15.0k
:695	IEEE-MMS-SSL	TCPtls	Security	caution	14.3k
:639	MSDP	TCPUDP	Network Services	caution	11.4k
:647	DHCP Failover	TCP	Network Services	caution	11.1k
:654	Media Management Protocol	TCP	Network Services	caution	10.2k

risk mix of the 8 listed

safe13%
caution88%

2 of 8 encrypted

Port :689NMAP

Technical Details

Security Information

Related Ports

Port 689NMAP