Port 537Networked Media Streaming Protocol

IANA-assigned port for the Networked Media Streaming Protocol, a media-streaming service over TCP or UDP.

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

also known as nmsp

Technical Details

what runs on :537

no technical write-up for :537 yet

the handshake, the implementations you meet in the wild, the flags that matter. we have the registry entry — the detail comes from the engineers who run it.

add technical details

Security Information

exposure of :537

risk score

1/ 10safe

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

streaming averages 3.5 across 31 ports — this one sits 2.5 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 :537 yet

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

Record

iana registry entry

port: :537
service: Networked Media Streaming Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Streaming Media
usage: TCP and UDP port 537 are assigned to the Networked Media Streaming Protocol. The assignment is registered to Paul Santinelli Jr.; public deployment and product usage details are not recorded.
lookups: 0rank 994
added: 2026-08-23
updated: 2026-08-23
references: IANA service name registry — port 537

Something wrong?

This record is maintained by the engineers who use port 537. 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 2026-08-23.

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 31 in streaming →

the 8 most looked-up other ports in streaming — 31 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	Windows Media SOAP Connector	TCP	Streaming	caution	24.3k
:5001	Slingbox	TCP	Streaming	caution	22.4k
:1220	QTSS Admin	TCP	Streaming	safe	20.6k
:19294	Google Talk Voice/Video	TCP	Streaming	caution	16.6k
:12013	Audition Korea Server	TCPUDP	Streaming	caution	14.5k
:9000	SqueezeCenter	TCP	Web Services	caution	14.4k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :537Networked Media Streaming Protocol

Technical Details

Security Information

Related Ports

Port 537Networked Media Streaming Protocol