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Port 37472 (3gpp-w1ap)

IANA assigns port 37472 to 3gpp-w1ap: W1 signalling transport.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
3gpp-w1ap SCTP W1 signalling transport 3GPP 3 -

Registry dates for this port: registered 2020-07-16.

Check what is listening on port 37472

Linux: is anything listening on TCP 37472?
sudo ss -tlnp 'sport = :37472'
Linux / macOS: which process owns the port
sudo lsof -nP -i :37472
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':37472 '
Windows (Command Prompt)
netstat -ano | findstr :37472
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 37472 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 37472
From Windows
Test-NetConnection HOST -Port 37472

Block port 37472 in the firewall

ufw
sudo ufw deny 37472/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 37472 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 37472 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 37472' -Direction Inbound -Protocol TCP -LocalPort 37472 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.