01SICCT Service Discovery Protocoludp · iana-registered · risk 1/10
UDP service discovery for finding networked SICCT chipcard terminals, primarily in German smartcard deployments.
port 4742 as SICCT Service Discovery Protocol →Port 47422 services
2 entries are registered on port 4742. It is a registered port (1024–49151) — IANA records an assignee, but nothing stops other software from listening here, which is why the number carries more than one entry.
- entries
- 2
- transport
- udp · tcp
- in transit
- 0/2
- worst risk
- 5/10
services registered on this number
2 transports in use
entries encrypted on the wire
2 of 2 iana-registered
Services on this port
| port | service | risk | |||
|---|---|---|---|---|---|
| :4742 | SICCT Service Discovery Protocol | UDP | Network Services | safe | 0 |
| :4742 | SICCT (Secure Interoperable ChipCard Terminal) | TCP | Security | caution | 0 |
02SICCT (Secure Interoperable ChipCard Terminal)tcp · iana-registered · risk 5/10
TCP port 4742 carries SICCT commands between host software and smart-card terminals, including card and terminal operations.
port 4742 as SICCT (Secure Interoperable ChipCard Terminal) →Which one is on your host
The registry says what 4742 is registered to. What is listening on it right now is decided by the host, and only the host can be asked. Each of these prints the process behind the socket.
- linux
ss -ltnp | grep ':4742\b'- macos
lsof -nP -iTCP:4742 -sTCP:LISTEN- windows
netstat -ano | findstr :4742
On Linux and Windows the process name comes back with the socket; on macOS lsof needs sudo to name a process that isn't yours. Match what it prints against the 2 entries above.
A port number is not a service. Anything may listen on 4742 — what you actually met is decided by the host, not the registry. If a service is missing here, it belongs in the registry.
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