Port 9909domaintime

An unidentified domaintime service assigned to TCP and UDP port 9909.

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

Technical Details

what runs on :9909

no technical write-up for :9909 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 :9909

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 :9909 yet

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

Record

iana registry entry

port: :9909
service: domaintime
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 9909 to the domaintime service. The assignment is registered to Jeffry Dwight, but no product, protocol specification, or common deployment is recorded.
lookups: 0rank 994
added: 2026-09-15
updated: 2026-09-15
references: IANA service name registry — port 9909

Something wrong?

This record is maintained by the engineers who use port 9909. 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 2026-09-15.

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 :9909, by lookups.

port	service	proto	category	risk	views
:9898	Tripwire FIM	TCP	Security	caution	15.0k
:9898	MonkeyCom	TCPUDP	Network Services	caution	13.6k
:9875	Club Penguin	TCP	Gaming	caution	7.3k
:9952	APC 9952	TCPUDP	—	safe	0
:9877	X.510 Wrapper Protocol	TCP	—	safe	0
:9878	KX509 Kerberized Certificate Issuance Protocol	UDPtls	Security	safe	0
:9875	Session Announcement Protocol v1	TCPUDP	Streaming	safe	0
:9876	Session Director	TCP	—	safe	0

risk mix of the 8 listed

safe63%
caution38%

1 of 8 encrypted

Port :9909domaintime

Technical Details

Security Information

Related Ports

Port 9909domaintime