Port 4742SICCT (Secure Interoperable ChipCard Terminal)

TCP port 4742 carries SICCT commands between host software and smart-card terminals, including card and terminal operations.

inSecurity Network Services

transport: tcp
in transit: cleartext
assignment: official
risk: 5/10
lookups: 0

also known as Secure Interoperable ChipCard Terminal

1 other service is registered on port 4742. compare all 2 →

Technical Details

what runs on :4742

SICCT uses TCP, conventionally on port 4742, for host software to communicate with a smart-card terminal. It is a command/response protocol rather than a web service: exchanges can include terminal status, card-slot operations, and forwarding commands or responses to a card (such as APDU traffic). The terminal and its software determine which operations are supported; SICCT is not a general-purpose remote shell or database protocol.

Security Information

exposure of :4742

risk score

5/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

security averages 3.1 across 381 ports — this one sits 1.9 above.

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

A reachable SICCT service may let a client interact with the terminal and any card inserted in it, so keep it on a controlled network and restrict access to authorized host software. The protocol name does not guarantee encrypted transport; do not assume traffic or commands are protected in transit without checking the particular terminal and deployment.

Record

iana registry entry

port: :4742
service: SICCT (Secure Interoperable ChipCard Terminal)
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 5/10caution
category: Security Network Services
usage: SICCT is a host-to-terminal protocol used to operate smart-card readers and exchange data with cards. Engineers are most likely to encounter it on a trusted local network in smart-card deployments, including German healthcare environments.
lookups: 0rank 993
added: 2026-10-05
updated: 2026-10-05
references: IANA service name registry — port 4742

Something wrong?

This record is maintained by the engineers who use port 4742. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-05.

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edit this record →back to the registry

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all 381 in security →

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risk mix of the 8 listed

caution100%

2 of 8 encrypted

Port :4742SICCT (Secure Interoperable ChipCard Terminal)

Technical Details

Security Information

Related Ports

Port 4742SICCT (Secure Interoperable ChipCard Terminal)