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Port 3619 (aairnet-2)

IANA assigns port 3619 to aairnet-2: AAIR-Network 2.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
aairnet-2 TCP AAIR-Network 2 James Mealey -
aairnet-2 UDP AAIR-Network 2 James Mealey -

Registry dates for this port: registered 2002-10.

Check what is listening on port 3619

Linux: is anything listening on TCP 3619?
sudo ss -tlnp 'sport = :3619'
Linux: UDP 3619
sudo ss -ulnp 'sport = :3619'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3619
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3619 '
Windows (Command Prompt)
netstat -ano | findstr :3619
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3619 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3619
From Windows
Test-NetConnection HOST -Port 3619
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3619

Block port 3619 in the firewall

ufw
sudo ufw deny 3619/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3619 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3619 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3619' -Direction Inbound -Protocol TCP -LocalPort 3619 -Action Block
ufw
sudo ufw deny 3619/udp
iptables
sudo iptables -A INPUT -p udp --dport 3619 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3619 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3619' -Direction Inbound -Protocol UDP -LocalPort 3619 -Action Block

Related ports

3617sharp-server3618aairnet-13620ep-pcp3621ep-nsp

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