Port 1940JetVision Client

Port assigned to the JetVision Client service over TCP and UDP.

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

also known as jvclient

Technical Details

what runs on :1940

JetVision Client is registered on port :1940 over tcp and udp to Stephen Tsun. 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 :1940

this machine

# linux
sudo ss -tulpn 'sport = :1940'

# macos / bsd
sudo lsof -nP -i :1940

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :1940

another host

nmap -sV -p T:1940 <host>
sudo nmap -sU -sV -p U:1940 <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 :1940

risk score

1/ 10safe

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

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 :1940 yet

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

Record

iana registry entry

port: :1940
service: JetVision Client
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 1940 to the JetVision Client service. The assignment is registered to Stephen Tsun, but the registry provides no further usage or product details.
lookups: 0rank 993
added: 2026-09-19
updated: 2026-09-19
references: IANA service name registry — port 1940

Something wrong?

This record is maintained by the engineers who use port 1940. 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 2026-09-19.

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

browse categories →

ports registered around :1940, by lookups.

port	service	proto	category	risk	views
:1920	IBM Tivoli Monitoring	TCPtls	Web Services	caution	21.5k
:1984	Big Brother Monitor	TCP	Security	caution	16.8k
:1947	Aladdin HASP License Manager	TCP	Security	caution	15.4k
:1900	SSDP / UPnP Discovery	UDP	Network Services	caution	14.6k
:1883	MQTT Broker	TCP	Network Services	caution	14.2k
:1967	Cisco IP SLA Control	UDP	Network Services	caution	13.2k
:2001	CAPTAN Test Stand	UDP	System	caution	11.8k
:1935	RTMP	TCP	Web Services	safe	11.1k

risk mix of the 8 listed

safe13%
caution88%

1 of 8 encrypted

Port :1940JetVision Client

Technical Details

Security Information

Related Ports

Port 1940JetVision Client