Port 5193AmericaOnline3

Port 5193 is assigned to AmericaOnline3, an AOL-related service registered to Bruce Mackey.

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

also known as aol-3

Technical Details

what runs on :5193

AmericaOnline3 is registered on port :5193 over tcp and udp to Bruce Mackey. 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 :5193

this machine

# linux
sudo ss -tulpn 'sport = :5193'

# macos / bsd
sudo lsof -nP -i :5193

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :5193

another host

nmap -sV -p T:5193 <host>
sudo nmap -sU -sV -p U:5193 <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 :5193

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 :5193 yet

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

Record

iana registry entry

port: :5193
service: AmericaOnline3
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The IANA registry assigns TCP and UDP port 5193 to AmericaOnline3 (aol-3). The assignment is registered to Bruce Mackey, but no broadly documented deployment or protocol behavior is established.
lookups: 0rank 993
added: 2026-08-27
updated: 2026-08-27
references: IANA service name registry — port 5193

Something wrong?

This record is maintained by the engineers who use port 5193. 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 2026-08-27.

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 :5193, by lookups.

port	service	proto	category	risk	views
:5247	CAPWAP Data	UDP	Network Services	caution	17.9k
:5223	XMPP over SSL	TCPtls	Security	caution	16.3k
:5246	CAPWAP Control	UDP	Network Services	caution	13.2k
:5222	XMPP Client Connection	TCP	Network Services	caution	11.7k
:5190	ICQ & AIM	TCP	Voice and Chat	caution	8.5k
:5151	ESRI SDE Remote Start	UDP	Databases	caution	6.1k
:5176	ConsoleWorks UI	TCP	Security	caution	6.0k
:5151	ESRI SDE	TCP	Databases	caution	5.8k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :5193AmericaOnline3

Technical Details

Security Information

Related Ports

Port 5193AmericaOnline3