HTTPfy

Port 9204 (wap-vcard)

IANA assigns port 9204 to wap-vcard: WAP vCard.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wap-vcard TCP WAP vCard WAP Forum -
wap-vcard UDP WAP vCard WAP Forum -

Check what is listening on port 9204

Linux: is anything listening on TCP 9204?
sudo ss -tlnp 'sport = :9204'
Linux: UDP 9204
sudo ss -ulnp 'sport = :9204'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9204
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9204 '
Windows (Command Prompt)
netstat -ano | findstr :9204
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9204 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9204
From Windows
Test-NetConnection HOST -Port 9204
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9204

Block port 9204 in the firewall

ufw
sudo ufw deny 9204/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9204 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9204 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9204' -Direction Inbound -Protocol TCP -LocalPort 9204 -Action Block
ufw
sudo ufw deny 9204/udp
iptables
sudo iptables -A INPUT -p udp --dport 9204 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9204 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9204' -Direction Inbound -Protocol UDP -LocalPort 9204 -Action Block

Related ports

9202wap-wsp-s9203wap-wsp-wtp-s9205wap-vcal9206wap-vcard-s

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