Port 47808BACnet

BACnet building automation traffic used by HVAC, lighting, access control, and other facility systems.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 8/10
lookups: 0

also known as BACnet/IP, BACnet/UDP

Technical Details

what runs on :47808

BACnet/IP normally uses UDP port 47808 (0xBAC0), carrying BACnet application messages inside BACnet Virtual Link Control (BVLC) frames. Devices may use broadcast addressing, foreign-device registration, and BACnet Broadcast Management Devices (BBMDs) to distribute traffic across routed IP networks; UDP operation has no connection handshake. The service is also registered for TCP, while newer BACnet Secure Connect deployments use TLS-protected WebSocket connections rather than ordinary unencrypted BACnet/IP.

Security Information

exposure of :47808

risk score

8/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

system averages 3.9 across 364 ports — this one sits 4.1 above.

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

Ordinary BACnet/IP is generally unauthenticated and unencrypted, and exposed devices may reveal building topology, equipment state, schedules, and control points. Internet exposure should be avoided; restrict it to required building-management networks with segmentation, filtering, and secure remote-access mechanisms, because reachable controllers may permit unauthorized monitoring or manipulation.

Record

iana registry entry

port: :47808
service: BACnet
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 8/10risk
category: System IoT
usage: BACnet is used by building automation controllers, HVAC systems, lighting systems, and facility management software to exchange monitoring and control data. Conventional BACnet/IP deployments use UDP port 47808, while the registry also lists the service for TCP.
lookups: 0rank 994
added: 2026-08-21
updated: 2026-08-21
references: IANA service name registry — port 47808

Something wrong?

This record is maintained by the engineers who use port 47808. 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
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edit this record →back to the registry

Related Ports

all 364 in system →

the 8 most looked-up other ports in system — 364 ports carry that label.

port	service	proto	category	risk	views
:8888	Sun Answerbook & Alt HTTP	TCP	Web Services	caution	123.9k
:4664	Google Desktop Search	TCP	System	caution	67.2k
:8008	IBM HTTP Server Admin	TCP	Web Services	caution	58.3k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:9080	WebSphere HTTP Transport (default)	TCP	Web Services	caution	51.6k
:23	Telnet	TCP	Remote Access	caution	34.8k
:12489	NSClient Monitoring Agent	TCP	Network Services	caution	30.0k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :47808BACnet

Technical Details

Security Information

Related Ports

Port 47808BACnet