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Port 4074 (cequint-cityid)

IANA assigns port 4074 to cequint-cityid: Cequint City ID UI trigger.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
cequint-cityid TCP Cequint City ID UI trigger Phill Goeckler -
cequint-cityid UDP Cequint City ID UI trigger Phill Goeckler -

Registry dates for this port: registered 2007-08-20.

Check what is listening on port 4074

Linux: is anything listening on TCP 4074?
sudo ss -tlnp 'sport = :4074'
Linux: UDP 4074
sudo ss -ulnp 'sport = :4074'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4074
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4074 '
Windows (Command Prompt)
netstat -ano | findstr :4074
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4074 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4074
From Windows
Test-NetConnection HOST -Port 4074
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4074

Block port 4074 in the firewall

ufw
sudo ufw deny 4074/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4074 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4074 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4074' -Direction Inbound -Protocol TCP -LocalPort 4074 -Action Block
ufw
sudo ufw deny 4074/udp
iptables
sudo iptables -A INPUT -p udp --dport 4074 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4074 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4074' -Direction Inbound -Protocol UDP -LocalPort 4074 -Action Block

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