HTTPfy

Port 1616 (netbill-prod)

IANA assigns port 1616 to netbill-prod: NetBill Product Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
netbill-prod TCP NetBill Product Server Marvin Sirbu -
netbill-prod UDP NetBill Product Server Marvin Sirbu -

Check what is listening on port 1616

Linux: is anything listening on TCP 1616?
sudo ss -tlnp 'sport = :1616'
Linux: UDP 1616
sudo ss -ulnp 'sport = :1616'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1616
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1616 '
Windows (Command Prompt)
netstat -ano | findstr :1616
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1616 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1616
From Windows
Test-NetConnection HOST -Port 1616
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1616

Block port 1616 in the firewall

ufw
sudo ufw deny 1616/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1616 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1616 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1616' -Direction Inbound -Protocol TCP -LocalPort 1616 -Action Block
ufw
sudo ufw deny 1616/udp
iptables
sudo iptables -A INPUT -p udp --dport 1616 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1616 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1616' -Direction Inbound -Protocol UDP -LocalPort 1616 -Action Block

Related ports

1614netbill-cred1615netbill-auth1617nimrod-agent1618skytelnet

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