Port 28240Siemens GSM

Port 28240 is assigned to Siemens GSM, but there is little evidence of it being used by publicly reachable services.

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

Technical Details

what runs on :28240

Siemens GSM is registered on port :28240 over tcp and udp to David Anuszewski, assigned November 2004. 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 :28240

this machine

# linux
sudo ss -tulpn 'sport = :28240'

# macos / bsd
sudo lsof -nP -i :28240

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :28240

another host

nmap -sV -p T:28240 <host>
sudo nmap -sU -sV -p U:28240 <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 :28240

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 2.1 across 118 ports — this one sits 1.1 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 :28240 yet

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

Record

iana registry entry

port: :28240
service: Siemens GSM
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Mobile
usage: The IANA assignment identifies this as Siemens GSM and lists David Anuszewski as the registrant. Its protocol and deployment context are not established by the available information.
lookups: 0rank 993
added: 2026-10-19
updated: 2026-10-19
references: IANA service name registry — port 28240

Something wrong?

This record is maintained by the engineers who use port 28240. 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 2026-10-19.

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 118 in mobile →

the 8 most looked-up other ports in mobile — 118 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 :28240Siemens GSM

Technical Details

Security Information

Related Ports

Port 28240Siemens GSM