IANA assigns port 2621 to miles-apart: Miles Apart Jukebox Server.
sudo ss -tlnp 'sport = :2621'sudo ss -ulnp 'sport = :2621'sudo lsof -nP -i :2621sudo netstat -tlnp | grep ':2621 'netstat -ano | findstr :2621Get-NetTCPConnection -LocalPort 2621 -State Listen | Select LocalAddress,OwningProcessnc -vz -w 5 HOST 2621Test-NetConnection HOST -Port 2621nc -vzu -w 5 HOST 2621sudo ufw deny 2621/tcpsudo iptables -A INPUT -p tcp --dport 2621 -j DROPsudo nft add rule inet filter input tcp dport 2621 dropNew-NetFirewallRule -DisplayName 'Block TCP 2621' -Direction Inbound -Protocol TCP -LocalPort 2621 -Action Blocksudo ufw deny 2621/udpsudo iptables -A INPUT -p udp --dport 2621 -j DROPsudo nft add rule inet filter input udp dport 2621 dropNew-NetFirewallRule -DisplayName 'Block UDP 2621' -Direction Inbound -Protocol UDP -LocalPort 2621 -Action BlockAll port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.