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Port 3139 (incognitorv)

IANA assigns port 3139 to incognitorv: Incognito Rendez-Vous.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
incognitorv TCP Incognito Rendez-Vous Stephane Bourque -
incognitorv UDP Incognito Rendez-Vous Stephane Bourque -

Check what is listening on port 3139

Linux: is anything listening on TCP 3139?
sudo ss -tlnp 'sport = :3139'
Linux: UDP 3139
sudo ss -ulnp 'sport = :3139'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3139
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3139 '
Windows (Command Prompt)
netstat -ano | findstr :3139
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3139 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3139
From Windows
Test-NetConnection HOST -Port 3139
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3139

Block port 3139 in the firewall

ufw
sudo ufw deny 3139/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3139 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3139 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3139' -Direction Inbound -Protocol TCP -LocalPort 3139 -Action Block
ufw
sudo ufw deny 3139/udp
iptables
sudo iptables -A INPUT -p udp --dport 3139 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3139 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3139' -Direction Inbound -Protocol UDP -LocalPort 3139 -Action Block

Related ports

3137rtnt-13138rtnt-23140ariliamulti3141vmodem

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