Port 1628LonTalk

LonTalk normal-priority control traffic used by LON building and industrial automation networks.

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

also known as lontalk-norm, LonTalk normal, LonTalk/IP

Technical Details

what runs on :1628

The IANA assignment covers LonTalk normal traffic over both TCP and UDP. In IP-based LON deployments, LonTalk frames are carried between gateways or nodes; normal-priority traffic is distinguished from the urgent-priority service associated with port 1629. LonTalk itself is a control-network protocol that can also run over non-IP media, so seeing this port generally indicates an IP encapsulation or gateway rather than a native physical LonTalk link.

Security Information

exposure of :1628

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 3.2 across 893 ports — this one sits 1.2 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

LonTalk traffic is not encrypted by default, and exposed endpoints may reveal or permit interaction with building-automation or industrial-control devices. It should normally be restricted to the control network or trusted management hosts; direct Internet exposure is unnecessary and increases the risk of unauthorized device control or denial of service.

Record

iana registry entry

port: :1628
service: LonTalk
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services IoT
usage: This port carries normal-priority LonTalk traffic in LON control systems, commonly through LonTalk-over-IP gateways and management infrastructure. Engineers typically encounter it on building-automation, industrial-control, and other embedded control networks rather than general-purpose hosts.
lookups: 0rank 994
added: 2026-09-01
updated: 2026-09-01
references: IANA service name registry — port 1628

Something wrong?

This record is maintained by the engineers who use port 1628. 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 2026-09-01.

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edit this record →back to the registry

Related Ports

all 893 in network services →

the 8 most looked-up other ports in network services — 893 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:6543	Jetnet	UDP	Network Services	caution	65.3k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :1628LonTalk

Technical Details

Security Information

Related Ports

Port 1628LonTalk