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Port 3989 (bv-queryengine)

IANA assigns port 3989 to bv-queryengine: BindView-Query Engine.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
bv-queryengine TCP BindView-Query Engine - -
bv-queryengine UDP BindView-Query Engine - -

Check what is listening on port 3989

Linux: is anything listening on TCP 3989?
sudo ss -tlnp 'sport = :3989'
Linux: UDP 3989
sudo ss -ulnp 'sport = :3989'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3989
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3989 '
Windows (Command Prompt)
netstat -ano | findstr :3989
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3989 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3989
From Windows
Test-NetConnection HOST -Port 3989
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3989

Block port 3989 in the firewall

ufw
sudo ufw deny 3989/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3989 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3989 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3989' -Direction Inbound -Protocol TCP -LocalPort 3989 -Action Block
ufw
sudo ufw deny 3989/udp
iptables
sudo iptables -A INPUT -p udp --dport 3989 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3989 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3989' -Direction Inbound -Protocol UDP -LocalPort 3989 -Action Block

Related ports

3987centerline3988dcs-config3990bv-is3991bv-smcsrv

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