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Port 2640 (ami-control)

IANA assigns port 2640 to ami-control: Alcorn McBride Inc protocol used for device control.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ami-control TCP Alcorn McBride Inc protocol used for device control Alcorn McBride Inc -
ami-control UDP Alcorn McBride Inc protocol used for device control Alcorn McBride Inc -

Registry dates for this port: last modified 2020-03-12.

Check what is listening on port 2640

Linux: is anything listening on TCP 2640?
sudo ss -tlnp 'sport = :2640'
Linux: UDP 2640
sudo ss -ulnp 'sport = :2640'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2640
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2640 '
Windows (Command Prompt)
netstat -ano | findstr :2640
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2640 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2640
From Windows
Test-NetConnection HOST -Port 2640
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2640

Block port 2640 in the firewall

ufw
sudo ufw deny 2640/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2640 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2640 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2640' -Direction Inbound -Protocol TCP -LocalPort 2640 -Action Block
ufw
sudo ufw deny 2640/udp
iptables
sudo iptables -A INPUT -p udp --dport 2640 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2640 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2640' -Direction Inbound -Protocol UDP -LocalPort 2640 -Action Block

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