Port 5582T-Mobile SMS Protocol Message 3

Port 5582 is assigned to T-Mobile SMS Protocol Message 3, a little-documented SMS-related service.

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

also known as fac-restore

Technical Details

what runs on :5582

T-Mobile SMS Protocol Message 3 is registered on port :5582 over tcp and udp to Jessica Yan, assigned February 2008. 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 :5582

this machine

# linux
sudo ss -tulpn 'sport = :5582'

# macos / bsd
sudo lsof -nP -i :5582

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :5582

another host

nmap -sV -p T:5582 <host>
sudo nmap -sU -sV -p U:5582 <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 :5582

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

mobile averages 2.0 across 88 ports — this one sits 1.0 below.

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 :5582 yet

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

Record

iana registry entry

port: :5582
service: T-Mobile SMS Protocol Message 3
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Mobile
usage: IANA lists TCP and UDP port 5582 for T-Mobile SMS Protocol Message 3, registered to Jessica Yan. No common public deployment or implementation details are documented.
lookups: 0rank 993
added: 2026-10-08
updated: 2026-10-08
references: IANA service name registry — port 5582

Something wrong?

This record is maintained by the engineers who use port 5582. 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 2026-10-08.

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

all 88 in mobile →

the 8 most looked-up other ports in mobile — 88 ports carry that label.

port	service	proto	category	risk	views
:8882	Atlasz Secure App Server	TCP	Web Services	caution	66.9k
:2082	Infowave Mobility	TCP	Network Services	caution	17.7k
:3386	GTP (GPRS Tunneling Protocol)	TCPUDP	Network Services	caution	16.7k
:7401	RTPS DDS Traffic	TCPUDP	Network Services	safe	14.7k
:2948	WAP Push MMS	TCPUDP	Network Services	safe	11.7k
:5222	XMPP Client Connection	TCP	Network Services	caution	11.7k
:3006	Miralix SMS Connector	TCP	Mobile	caution	11.3k
:2949	WAP Pushsecure MMS	TCPUDP	Cloud	safe	10.4k

risk mix of the 8 listed

safe38%
caution63%

0 of 8 encrypted

Port :5582T-Mobile SMS Protocol Message 3

Technical Details

Security Information

Related Ports

Port 5582T-Mobile SMS Protocol Message 3