Port 21000IRTrans Control

Control traffic for IRTrans infrared remote-control devices.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

Technical Details

what runs on :21000

no technical write-up for :21000 yet

the handshake, the implementations you meet in the wild, the flags that matter. we have the registry entry — the detail comes from the engineers who run it.

add technical details

Security Information

exposure of :21000

risk 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 3.8 across 94 ports — this one sits 2.8 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

no security notes recorded for :21000 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :21000
service: IRTrans Control
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: IoT
usage: Port 21000/tcp and udp is assigned to IRTrans Control and registered to Marcus Mueller. The name indicates an association with IRTrans infrared remote-control equipment, but the registry provides no further deployment details.
lookups: 0rank 994
added: 2026-08-21
updated: 2026-08-21
references: IANA service name registry — port 21000

Something wrong?

This record is maintained by the engineers who use port 21000. 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 2026-08-21.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

all 94 in iot →

the 8 most looked-up other ports in iot — 94 ports carry that label.

port	service	proto	category	risk	views
: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

Port :21000IRTrans Control

Technical Details

Security Information

Related Ports

Port 21000IRTrans Control