Port 4173MMA Device Discovery

UDP port 4173 is assigned to MIDI device discovery by the MIDI Manufacturers Association.

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

also known as mma-discovery

Technical Details

what runs on :4173

MMA Device Discovery is registered on port :4173 over udp to MIDI Manufacturers Assoc Inc, assigned November 2011. 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 :4173

this machine

# linux
sudo ss -ulpn 'sport = :4173'

# macos / bsd
sudo lsof -nP -i :4173

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :4173

another host

sudo nmap -sU -sV -p U:4173 <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 :4173

risk score

1/ 10safe

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

media averages 2.2 across 120 ports — this one sits 1.2 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

udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

no security notes recorded for :4173 yet

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

Record

iana registry entry

port: :4173
service: MMA Device Discovery
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Media
usage: The IANA assignment is for MMA Device Discovery over UDP and is held by the MIDI Manufacturers Association. There is no clear evidence that it is a commonly deployed listener.
lookups: 0rank 993
added: 2026-10-03
updated: 2026-10-03
references: IANA service name registry — port 4173

Something wrong?

This record is maintained by the engineers who use port 4173. 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 2026-10-03.

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 120 in media →

the 8 most looked-up other ports in media — 120 ports carry that label.

port	service	proto	category	risk	views
:8888	GNUmp3d Streaming HTTP	TCP	Web Services	caution	76.3k
:8000	Alternate HTTP / SHOUTcast	TCP	Web Services	caution	45.0k
:8880	CDDB Protocol Alternate	UDP	Network Services	caution	29.5k
:6005	Camfrog Chat	TCP	Voice and Chat	caution	25.2k
:8880	Windows Media SOAP Connector	TCP	Streaming	caution	24.3k
:8081	HTTP Alternate Port	TCP	Web Services	caution	23.3k
:5001	Slingbox	TCP	Streaming	caution	22.4k
:19302	Google Talk Voice & Video	UDP	Network Services	caution	19.3k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :4173MMA Device Discovery

Technical Details

Security Information

Related Ports

Port 4173MMA Device Discovery