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Port 39063 (vroa)

IANA assigns port 39063 to vroa: Children's hearing test/Telemedicine.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vroa TCP Children's hearing test/Telemedicine Hearing Australia -

Registry dates for this port: registered 2021-12-23.

Check what is listening on port 39063

Linux: is anything listening on TCP 39063?
sudo ss -tlnp 'sport = :39063'
Linux / macOS: which process owns the port
sudo lsof -nP -i :39063
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':39063 '
Windows (Command Prompt)
netstat -ano | findstr :39063
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 39063 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 39063
From Windows
Test-NetConnection HOST -Port 39063

Block port 39063 in the firewall

ufw
sudo ufw deny 39063/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 39063 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 39063 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 39063' -Direction Inbound -Protocol TCP -LocalPort 39063 -Action Block

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