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Port 48129 (blp5)

IANA assigns port 48129 to blp5: Bloomberg locator.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
blp5 TCP Bloomberg locator Albert Hou -
blp5 UDP Bloomberg locator Albert Hou -

Registry dates for this port: registered 2006-05.

Check what is listening on port 48129

Linux: is anything listening on TCP 48129?
sudo ss -tlnp 'sport = :48129'
Linux: UDP 48129
sudo ss -ulnp 'sport = :48129'
Linux / macOS: which process owns the port
sudo lsof -nP -i :48129
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':48129 '
Windows (Command Prompt)
netstat -ano | findstr :48129
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 48129 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 48129
From Windows
Test-NetConnection HOST -Port 48129
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 48129

Block port 48129 in the firewall

ufw
sudo ufw deny 48129/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 48129 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 48129 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 48129' -Direction Inbound -Protocol TCP -LocalPort 48129 -Action Block
ufw
sudo ufw deny 48129/udp
iptables
sudo iptables -A INPUT -p udp --dport 48129 -j DROP
nftables
sudo nft add rule inet filter input udp dport 48129 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 48129' -Direction Inbound -Protocol UDP -LocalPort 48129 -Action Block

Related ports

48050weandsf48128isnetserv48556com-bardac-dw48619iqobject

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