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// Other services

Port 3989: BindView-Query Engine

Port 3989 is assigned by IANA to bv-queryengine (BindView-Query Engine).

3989

How bv-queryengine works

Other services
client:3989bv-queryengineresponse client:3989bv-queryengineresponse

The client sends a request to port 3989 and the bv-queryengine service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 3989 dangerous?

We have no specific security note for port 3989. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 3989

ServicePortTransportDescriptionReferenceUpdated
bv-queryengine 3989 TCP, UDP BindView-Query Engine - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3989, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3989'      # process listening on 3989
sudo lsof -nP -i :3989

macOS

sudo lsof -nP -i :3989

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3989 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3989
netstat -ano | findstr :3989

From another machine

nmap -p 3989 -sV <host>
sudo nmap -sU -p 3989 <host>
nc -zv <host> 3989

Block it in the firewall

sudo ufw deny 3989/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3989" -Direction Inbound -LocalPort 3989 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3989 used for?

Port 3989 is assigned by IANA to bv-queryengine (BindView-Query Engine).

Is port 3989 TCP or UDP?

Port 3989 is registered for TCP and UDP.

Is it safe to open port 3989?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 3989 is open?

On Linux run "ss -ltnup 'sport = :3989'", on macOS "lsof -nP -i :3989", and on Windows "netstat -ano | findstr :3989" to see the local process. From another machine, "nmap -p 3989 <host>" shows whether it is reachable.

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