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Port 1044 (dcutility)

IANA assigns port 1044 to dcutility: Dev Consortium Utility.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dcutility TCP Dev Consortium Utility Chris Ryland -
dcutility UDP Dev Consortium Utility Chris Ryland -

Registry dates for this port: registered 2004-11.

Check what is listening on port 1044

Linux: is anything listening on TCP 1044?
sudo ss -tlnp 'sport = :1044'
Linux: UDP 1044
sudo ss -ulnp 'sport = :1044'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1044
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1044 '
Windows (Command Prompt)
netstat -ano | findstr :1044
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1044 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1044
From Windows
Test-NetConnection HOST -Port 1044
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1044

Block port 1044 in the firewall

ufw
sudo ufw deny 1044/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1044 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1044 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1044' -Direction Inbound -Protocol TCP -LocalPort 1044 -Action Block
ufw
sudo ufw deny 1044/udp
iptables
sudo iptables -A INPUT -p udp --dport 1044 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1044 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1044' -Direction Inbound -Protocol UDP -LocalPort 1044 -Action Block

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