HTTPfy

Port 3738 (versatalk)

IANA assigns port 3738 to versatalk: versaTalk Server Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
versatalk TCP versaTalk Server Port Dr Kingsley C Nwos -
versatalk UDP versaTalk Server Port Dr Kingsley C Nwos -

Registry dates for this port: registered 2003-04.

Check what is listening on port 3738

Linux: is anything listening on TCP 3738?
sudo ss -tlnp 'sport = :3738'
Linux: UDP 3738
sudo ss -ulnp 'sport = :3738'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3738
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3738 '
Windows (Command Prompt)
netstat -ano | findstr :3738
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3738 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3738
From Windows
Test-NetConnection HOST -Port 3738
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3738

Block port 3738 in the firewall

ufw
sudo ufw deny 3738/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3738 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3738 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3738' -Direction Inbound -Protocol TCP -LocalPort 3738 -Action Block
ufw
sudo ufw deny 3738/udp
iptables
sudo iptables -A INPUT -p udp --dport 3738 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3738 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3738' -Direction Inbound -Protocol UDP -LocalPort 3738 -Action Block

Related ports

3736rs-rmi3737xpanel3739launchbird-lm3740heartbeat

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