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// Other services

Port 37472: W1 signalling transport

Port 37472 is assigned by IANA to 3gpp-w1ap (W1 signalling transport).

37472

How 3gpp-w1ap works

Other services
client:374723gpp-w1apresponse client:374723gpp-w1apresponse

The client sends a request to port 37472 and the 3gpp-w1ap service answers.

Transport
SCTP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 37472 dangerous?

We have no specific security note for port 37472. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 37472

ServicePortTransportDescriptionReferenceUpdated
3gpp-w1ap 37472 SCTP W1 signalling transport - 2020-07-16
-37472-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 37472, and is it reachable?

Linux

sudo ss -ltnup 'sport = :37472'      # process listening on 37472
sudo lsof -nP -i :37472

macOS

sudo lsof -nP -i :37472

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 37472 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 37472
netstat -ano | findstr :37472

From another machine

nmap -p 37472 -sV <host>
nc -zv <host> 37472

Block it in the firewall

sudo ufw deny 37472/sctp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 37472" -Direction Inbound -LocalPort 37472 -Protocol SCTP -Action Block  # Windows
04 FAQ
What is port 37472 used for?

Port 37472 is assigned by IANA to 3gpp-w1ap (W1 signalling transport).

Is port 37472 TCP or UDP?

Port 37472 is registered for SCTP.

Is it safe to open port 37472?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 37472 is open?

On Linux run "ss -ltnup 'sport = :37472'", on macOS "lsof -nP -i :37472", and on Windows "netstat -ano | findstr :37472" to see the local process. From another machine, "nmap -p 37472 <host>" shows whether it is reachable.

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