CyberHunter
Local dataset, no network
// Other services

Port 48129: Bloomberg locator

Port 48129 is assigned by IANA to blp5 (Bloomberg locator).

48129

How blp5 works

Other services
client:48129blp5response client:48129blp5response

The client sends a request to port 48129 and the blp5 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 48129 dangerous?

We have no specific security note for port 48129. 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 48129

ServicePortTransportDescriptionReferenceUpdated
blp5 48129 TCP, UDP Bloomberg locator - 2006-05

// source: IANA service name and port number registry

03 Check it

Which program uses port 48129, and is it reachable?

Linux

sudo ss -ltnup 'sport = :48129'      # process listening on 48129
sudo lsof -nP -i :48129

macOS

sudo lsof -nP -i :48129

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 48129 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 48129
netstat -ano | findstr :48129

From another machine

nmap -p 48129 -sV <host>
sudo nmap -sU -p 48129 <host>
nc -zv <host> 48129

Block it in the firewall

sudo ufw deny 48129/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 48129" -Direction Inbound -LocalPort 48129 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 48129 used for?

Port 48129 is assigned by IANA to blp5 (Bloomberg locator).

Is port 48129 TCP or UDP?

Port 48129 is registered for TCP and UDP.

Is it safe to open port 48129?

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 48129 is open?

On Linux run "ss -ltnup 'sport = :48129'", on macOS "lsof -nP -i :48129", and on Windows "netstat -ano | findstr :48129" to see the local process. From another machine, "nmap -p 48129 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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