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Port 1596 (radio-sm, radio-bc)

IANA assigns port 1596 to radio-sm, radio-bc: radio-sm.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
radio-sm TCP radio-sm - -
radio-bc UDP radio-bc Ken Chapman -

Check what is listening on port 1596

Linux: is anything listening on TCP 1596?
sudo ss -tlnp 'sport = :1596'
Linux: UDP 1596
sudo ss -ulnp 'sport = :1596'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1596
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1596 '
Windows (Command Prompt)
netstat -ano | findstr :1596
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1596 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1596
From Windows
Test-NetConnection HOST -Port 1596
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1596

Block port 1596 in the firewall

ufw
sudo ufw deny 1596/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1596 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1596 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1596' -Direction Inbound -Protocol TCP -LocalPort 1596 -Action Block
ufw
sudo ufw deny 1596/udp
iptables
sudo iptables -A INPUT -p udp --dport 1596 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1596 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1596' -Direction Inbound -Protocol UDP -LocalPort 1596 -Action Block

Related ports

1594sixtrak1595radio1597orbplus-iiop1598picknfs

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.