Port 5550MERG CBUS
TCP port 5550 is assigned to the CBUS message protocol for model railway control.
- transport
- tcp
- in transit
- cleartext
- assignment
- official
- risk
- 1/10
- lookups
- 0
single transport
payload readable on path
registered with iana
safe
rank 993 of 5,506 · top 18%
1 other service is registered on port 5550. compare all 2 →
Technical Details
what runs on :5550MERG CBUS is registered on port :5550 over tcp to MERG, assigned January 2017. We don't have a technical write-up for it beyond the IANA registry entry.
In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.
find what's listening on :5550
# linux
sudo ss -tlpn 'sport = :5550'
# macos / bsd
sudo lsof -nP -i :5550
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :5550nmap -sV -p T:5550 <host>run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.
add technical detailsSecurity Information
exposure of :5550risk score
1/ 10safe
routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.
iot averages 3.4 across 169 ports — this one sits 2.4 below.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
tcp
every listening transport is another surface to filter at the edge
security overview
no security notes recorded for :5550 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
the 8 most looked-up other ports in iot — 169 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :6543 | Jetnet | UDP | Network Services | caution | 65.3k |
| :3233 | WhiskerControl Protocol | TCPUDP | Network Services | caution | 61.9k |
| :9600 | Omron FINS Communication | UDP | Network Services | caution | 33.2k |
| :4840 | OPC UA TCP | TCPUDP | Network Services | caution | 26.6k |
| :5678 | Mikrotik MNDP | UDP | Network Services | caution | 24.7k |
| :4843 | OPC UA over TLS/SSL | TCPUDPtls | Security | caution | 24.6k |
| :5001 | Slingbox | TCP | Streaming | caution | 22.4k |
| :15000 | Hypack Data Acquisition | TCP | Network Services | caution | 21.4k |
risk mix of the 8 listed
- caution100%
1 of 8 encrypted