Port 5555Personal Agent

Personal Agent traffic is assigned to TCP and UDP port 5555.

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

1 other service is registered on port 5555. compare all 2 →

Technical Details

what runs on :5555

Personal Agent is registered on port :5555 over tcp and udp to Jackie Wu. 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 sometimes. What's listening is often not the registered service, so check before you assume.

IANA has recorded this port being used for something it was not assigned for.

find what's listening on :5555

this machine

# linux
sudo ss -tulpn 'sport = :5555'

# macos / bsd
sudo lsof -nP -i :5555

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :5555

another host

nmap -sV -p T:5555 <host>
sudo nmap -sU -sV -p U:5555 <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 :5555

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 :5555 yet

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

Record

iana registry entry

port: :5555
service: Personal Agent
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 5555 to a service named Personal Agent. The assignment is registered to Jackie Wu, but no standard protocol or product usage is documented in the registry.
lookups: 0rank 993
added: 2026-08-21
updated: 2026-08-21
references: IANA service name registry — port 5555

Something wrong?

This record is maintained by the engineers who use port 5555. 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 :5555, by lookups.

port	service	proto	category	risk	views
:5555	Freeciv	TCP	Security	caution	26.9k
:5495	Applix TM1 Admin	TCP	Databases	caution	24.8k
:5500	VNC Viewer Listener	TCP	Remote Access	caution	15.1k
:5498	Hotline Tracker Server	TCP	File Transfer	caution	8.4k
:5550	HP Data Protector	TCP	File Transfer	caution	8.2k
:5517	Setiqueue Proxy	TCPtls	Cloud	caution	8.0k
:5501	Hotline File Transfer	TCP	File Transfer	caution	7.8k
:5591	Tidal Scheduler Master	TCP	System	caution	6.9k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :5555Personal Agent

Technical Details

Security Information

Related Ports

Port 5555Personal Agent