CyberHunter
Local dataset, no network
// Other services

Port 39681: TurboNote Default Port

Port 39681 is assigned by IANA to turbonote-1 (TurboNote Default Port).

39681

How turbonote-1 works

Other services
client:39681turbonote-1response client:39681turbonote-1response

The client sends a request to port 39681 and the turbonote-1 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 39681 dangerous?

We have no specific security note for port 39681. 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 39681

ServicePortTransportDescriptionReferenceUpdated
turbonote-1 39681 TCP, UDP TurboNote Default Port - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 39681, and is it reachable?

Linux

sudo ss -ltnup 'sport = :39681'      # process listening on 39681
sudo lsof -nP -i :39681

macOS

sudo lsof -nP -i :39681

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 39681 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 39681
netstat -ano | findstr :39681

From another machine

nmap -p 39681 -sV <host>
sudo nmap -sU -p 39681 <host>
nc -zv <host> 39681

Block it in the firewall

sudo ufw deny 39681/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 39681" -Direction Inbound -LocalPort 39681 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 39681 used for?

Port 39681 is assigned by IANA to turbonote-1 (TurboNote Default Port).

Is port 39681 TCP or UDP?

Port 39681 is registered for TCP and UDP.

Is it safe to open port 39681?

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 39681 is open?

On Linux run "ss -ltnup 'sport = :39681'", on macOS "lsof -nP -i :39681", and on Windows "netstat -ano | findstr :39681" to see the local process. From another machine, "nmap -p 39681 <host>" shows whether it is reachable.

05 Related
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