Port 5037 (ADB server)

Local adb server on the development machine that talks to connected Android devices.

Registered (user) port, 1024-49151 TCP Development tools Localhost or LAN only

What port 5037 is used for

Local adb server on the development machine that talks to connected Android devices.

Localhost or LAN only. Should only listen on localhost.

Port 5037 is in the registered range and has no IANA assignment. The usage above is unofficial but widespread.

Linux: is anything listening on TCP 5037?

sudo ss -tlnp 'sport = :5037'

Linux / macOS: which process owns the port

sudo lsof -nP -i :5037

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':5037 '

Windows (Command Prompt)

netstat -ano | findstr :5037

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5037 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 5037

From Windows

Test-NetConnection HOST -Port 5037

ufw

sudo ufw deny 5037/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 5037 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 5037 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 5037' -Direction Inbound -Protocol TCP -LocalPort 5037 -Action Block

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