Port 186KIS Protocol

KIS Protocol traffic uses TCP or UDP port 186.

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

also known as kis

Technical Details

what runs on :186

KIS Protocol is registered on port :186 over tcp and udp to Ralph Droms. 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 :186

this machine

# linux
sudo ss -tulpn 'sport = :186'

# macos / bsd
sudo lsof -nP -i :186

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :186

another host

nmap -sV -p T:186 <host>
sudo nmap -sU -sV -p U:186 <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 :186

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 :186 yet

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

Record

iana registry entry

port: :186
service: KIS Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: TCP and UDP port 186 is assigned to the KIS Protocol. The assignment is registered to Ralph Droms, but there is little publicly established information about implementations or typical deployment.
lookups: 0rank 993
added: 2026-09-08
updated: 2026-09-08
references: IANA service name registry — port 186

Something wrong?

This record is maintained by the engineers who use port 186. 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 2026-09-08.

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 :186, by lookups.

port	service	proto	category	risk	views
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:143	IMAP	TCPUDP	Email	caution	20.7k
:201	AppleTalk Routing	TCPUDP	Network Services	caution	19.7k
:194	Internet Relay Chat	TCPUDP	Voice and Chat	caution	17.5k
:135	DCE/RPC Endpoint Mapper	TCPUDP	Remote Access	caution	16.7k
:213	IPX	TCPUDP	Network Services	caution	13.9k
:139	NetBIOS Session Service	TCPUDP	File Transfer	caution	13.3k
:123	Network Time Protocol	UDP	Network Services	safe	13.2k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :186KIS Protocol

Technical Details

Security Information

Related Ports

Port 186KIS Protocol