Port 3727Ericsson Mobile Data Unit

TCP/UDP 3727 is assigned to Ericsson Mobile Data Unit (e-mdu); no common deployment is documented.

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

also known as e-mdu

Technical Details

what runs on :3727

Ericsson Mobile Data Unit is registered on port :3727 over tcp and udp. 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 :3727

this machine

# linux
sudo ss -tulpn 'sport = :3727'

# macos / bsd
sudo lsof -nP -i :3727

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3727

another host

nmap -sV -p T:3727 <host>
sudo nmap -sU -sV -p U:3727 <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 :3727

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 76 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 :3727 yet

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

Record

iana registry entry

port: :3727
service: Ericsson Mobile Data Unit
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Mobile
usage: The IANA entry names the service Ericsson Mobile Data Unit, but records no registrant. No common deployment is documented, and the port has not been observed open in Nmap's scan data.
lookups: 0rank 993
added: 2026-10-01
updated: 2026-10-01
references: IANA service name registry — port 3727

Something wrong?

This record is maintained by the engineers who use port 3727. 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 2026-10-01.

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 76 in mobile →

the 8 most looked-up other ports in mobile — 76 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 :3727Ericsson Mobile Data Unit

Technical Details

Security Information

Related Ports

Port 3727Ericsson Mobile Data Unit