Port 13820DSM-CC Pass-Through Messages

Port 13820 is assigned to DSM-CC pass-through messaging, a control protocol associated with MPEG-based interactive TV and video-on-demand systems.

inNetwork Services Media

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as dsmcc-passthru

Technical Details

what runs on :13820

IANA lists this service on both TCP and UDP. DSM-CC is specified in ISO/IEC 13818-6 and defines binary control messages used in MPEG systems; those messages have structured headers and are commonly carried in MPEG-2 transport-stream sections. The port assignment alone does not establish a universal TCP handshake, UDP exchange, or default listener behavior, so do not infer a particular implementation from an open port without identifying the application.

Security Information

exposure of :13820

risk score

2/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

network services averages 2.6 across 1,898 ports — this one sits 0.6 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 · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

DSM-CC traffic is not encrypted by default. Where a DSM-CC-capable service is deployed, restrict access to the intended media or service-management network and keep its message parser updated; there is no basis to treat this obscure assignment as a commonly exposed internet service.

Record

iana registry entry

port: :13820
service: DSM-CC Pass-Through Messages
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services Media
usage: The assignment is for DSM-CC (Digital Storage Media Command and Control) pass-through messages, associated with interactive television and video-on-demand systems. It is not commonly encountered as an internet-facing listener; DSM-CC is more often seen in MPEG broadcast or managed media environments.
lookups: 0rank 993
added: 2026-10-17
updated: 2026-10-17
references: IANA service name registry — port 13820

Something wrong?

This record is maintained by the engineers who use port 13820. 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 2026-10-17.

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all 1,898 in network services →

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :13820DSM-CC Pass-Through Messages

Technical Details

Security Information

Related Ports

Port 13820DSM-CC Pass-Through Messages