Port 18186Occupational Health SC

IANA assigns TCP and UDP port 18186 to Occupational Health SC; no established deployment is known.

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

also known as ohsc

Technical Details

what runs on :18186

Occupational Health SC is registered on port :18186 over tcp and udp to David Fudge, assigned August 2003. 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 :18186

this machine

# linux
sudo ss -tulpn 'sport = :18186'

# macos / bsd
sudo lsof -nP -i :18186

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :18186

another host

nmap -sV -p T:18186 <host>
sudo nmap -sU -sV -p U:18186 <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 :18186

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 :18186 yet

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

Record

iana registry entry

port: :18186
service: Occupational Health SC
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA lists port 18186 for Occupational Health SC and names David Fudge as the registrant. No specific implementation or common real-world use is established.
lookups: 0rank 993
added: 2026-10-18
updated: 2026-10-18
references: IANA service name registry — port 18186

Something wrong?

This record is maintained by the engineers who use port 18186. 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 2026-10-18.

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 :18186, by lookups.

port	service	proto	category	risk	views
:18200	Audition Online Server Check	TCPUDP	Gaming	caution	20.9k
:18206	Audition FAM DB	TCPUDP	Databases	caution	19.1k
:18201	Audition Online Thailand	TCPUDP	Gaming	caution	17.5k
:18180	DART Reporting	TCP	Network Services	caution	6.9k
:18182	OPSEC UFP	TCPUDP	Security	safe	0
:18183	OPSEC SAM	TCPUDP	Security	safe	0
:18184	OPSEC LEA	TCPUDPtls	Security	caution	0
:18181	OPSEC CVP	TCPUDP	Security	caution	0

risk mix of the 8 listed

safe25%
caution75%

1 of 8 encrypted

Port :18186Occupational Health SC

Technical Details

Security Information

Related Ports

Port 18186Occupational Health SC