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Port 16619 (xoms)

IANA assigns port 16619 to xoms: X509 Objects Management Service.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
xoms TCP X509 Objects Management Service Francis GASCHET -

Registry dates for this port: registered 2008-09-08.

Check what is listening on port 16619

Linux: is anything listening on TCP 16619?
sudo ss -tlnp 'sport = :16619'
Linux / macOS: which process owns the port
sudo lsof -nP -i :16619
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':16619 '
Windows (Command Prompt)
netstat -ano | findstr :16619
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 16619 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 16619
From Windows
Test-NetConnection HOST -Port 16619

Block port 16619 in the firewall

ufw
sudo ufw deny 16619/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 16619 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 16619 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 16619' -Direction Inbound -Protocol TCP -LocalPort 16619 -Action Block

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