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Port 6547 (apc-6547)

IANA assigns port 6547 to apc-6547: APC 6547.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
apc-6547 TCP APC 6547 American Power Conve -
apc-6547 UDP APC 6547 American Power Conve -

Check what is listening on port 6547

Linux: is anything listening on TCP 6547?
sudo ss -tlnp 'sport = :6547'
Linux: UDP 6547
sudo ss -ulnp 'sport = :6547'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6547
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6547 '
Windows (Command Prompt)
netstat -ano | findstr :6547
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6547 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6547
From Windows
Test-NetConnection HOST -Port 6547
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6547

Block port 6547 in the firewall

ufw
sudo ufw deny 6547/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6547 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6547 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6547' -Direction Inbound -Protocol TCP -LocalPort 6547 -Action Block
ufw
sudo ufw deny 6547/udp
iptables
sudo iptables -A INPUT -p udp --dport 6547 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6547 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6547' -Direction Inbound -Protocol UDP -LocalPort 6547 -Action Block

Related ports

6543lds-distrib6544lds-dump6548apc-65486549apc-6549

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