Port 40023K-Patents Sensor Information

Vendor-specific UDP assignment for K-Patents sensor information from Vaisala.

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

Technical Details

what runs on :40023

K-Patents Sensor Information is registered on port :40023 over udp to Vaisala, assigned December 2015. 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 :40023

this machine

# linux
sudo ss -ulpn 'sport = :40023'

# macos / bsd
sudo lsof -nP -i :40023

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :40023

another host

sudo nmap -sU -sV -p U:40023 <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 details

Security Information

exposure of :40023

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 3.4 across 197 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

udp

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

security overview

no security notes recorded for :40023 yet

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

Record

iana registry entry

port: :40023
service: K-Patents Sensor Information
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: IoT
usage: IANA lists UDP/40023 for K-Patents Sensor Information and assigns it to Vaisala. The assignment identifies a vendor-specific sensor service, but does not establish which product models listen or how the protocol works.
lookups: 0rank 993
added: 2026-10-20
updated: 2026-10-20
references: IANA service name registry — port 40023

Something wrong?

This record is maintained by the engineers who use port 40023. 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 2026-10-20.

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 197 in iot →

the 8 most looked-up other ports in iot — 197 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 :40023K-Patents Sensor Information

Technical Details

Security Information

Related Ports

Port 40023K-Patents Sensor Information