HTTPfy

Port 5146 (social-alarm)

IANA assigns port 5146 to social-alarm: Social Alarm Service.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
social-alarm TCP Social Alarm Service Shaun Byrne -

Registry dates for this port: registered 2009-08-18.

Check what is listening on port 5146

Linux: is anything listening on TCP 5146?
sudo ss -tlnp 'sport = :5146'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5146
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5146 '
Windows (Command Prompt)
netstat -ano | findstr :5146
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5146 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5146
From Windows
Test-NetConnection HOST -Port 5146

Block port 5146 in the firewall

ufw
sudo ufw deny 5146/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5146 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5146 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5146' -Direction Inbound -Protocol TCP -LocalPort 5146 -Action Block

Related ports

5137ctsd5145rmonitor-secure, rmonitor_secure5150atmp5151esri-sde, esri_sde

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