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Port 48004 (nimbusdb)

IANA assigns port 48004 to nimbusdb: NimbusDB Connector.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
nimbusdb TCP NimbusDB Connector Stephen Harrison -

Registry dates for this port: registered 2011-01-24.

Check what is listening on port 48004

Linux: is anything listening on TCP 48004?
sudo ss -tlnp 'sport = :48004'
Linux / macOS: which process owns the port
sudo lsof -nP -i :48004
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':48004 '
Windows (Command Prompt)
netstat -ano | findstr :48004
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 48004 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 48004
From Windows
Test-NetConnection HOST -Port 48004

Block port 48004 in the firewall

ufw
sudo ufw deny 48004/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 48004 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 48004 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 48004' -Direction Inbound -Protocol TCP -LocalPort 48004 -Action Block

Related ports

48002nimhub48003nimgtw48005nimbusdbctrl48048juka

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