Port 1839Netopia VO1

Netopia VO1 is an obscure service assigned to TCP and UDP port 1839.

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

Technical Details

what runs on :1839

Netopia VO1 is registered on port :1839 over tcp and udp. 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 found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :1839

this machine

# linux
sudo ss -tulpn 'sport = :1839'

# macos / bsd
sudo lsof -nP -i :1839

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :1839

another host

nmap -sV -p T:1839 <host>
sudo nmap -sU -sV -p U:1839 <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 :1839

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 :1839 yet

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

Record

iana registry entry

port: :1839
service: Netopia VO1
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns the name netopia-vo1 to both TCP and UDP port 1839. No registrant or documented deployment information is recorded, and the service is rarely observed on the public internet.
lookups: 0rank 993
added: 2026-09-09
updated: 2026-09-09
references: IANA service name registry — port 1839

Something wrong?

This record is maintained by the engineers who use port 1839. 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 2026-09-09.

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 :1839, by lookups.

port	service	proto	category	risk	views
:1863	Microsoft Notification Protocol	TCP	Voice and Chat	caution	15.9k
:1900	SSDP / UPnP Discovery	UDP	Network Services	caution	14.6k
:1883	MQTT Broker	TCP	Network Services	caution	14.2k
:1812	RADIUS Auth Protocol	TCPUDP	Security	caution	12.0k
:1886	Leonardo over IP	TCP	File Transfer	caution	10.4k
:1801	MSMQ	TCPUDP	Network Services	caution	8.9k
:1813	RADIUS Accounting	TCPUDP	Security	caution	7.2k
:1840	Netopia VO2	TCPUDP	—	safe	0

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :1839Netopia VO1

Technical Details

Security Information

Related Ports

Port 1839Netopia VO1