BACnet object types

Updated 7 November 2026

Short answer

The object type is the top 10 bits of every BACnet Object Identifier. Here is every standard type number and its name. Examples: 0 = analog-input, 1 = analog-output, 2 = analog-value.

Looking for a number but not sure which list it belongs to? Use the BACnet number lookup, which searches every table at once.

Object types (65)

Number	Object type	Notes
0	analog-input
1	analog-output
2	analog-value
3	binary-input
4	binary-output
5	binary-value
6	calendar
7	command
8	device
9	event-enrollment
10	file
11	group
12	loop
13	multi-state-input
14	multi-state-output
15	notification-class
16	program
17	schedule
18	averaging
19	multi-state-value
20	trendlog
21	life-safety-point
22	life-safety-zone
23	accumulator
24	pulse-converter
25	event-log
26	global-group
27	trend-log-multiple
28	load-control
29	structured-view
30	access-door
31	timer
32	access-credential
33	access-point
34	access-rights
35	access-user
36	access-zone
37	credential-data-input
38	network-security
39	bitstring-value
40	characterstring-value
41	date-pattern-value
42	date-value
43	datetime-pattern-value
44	datetime-value
45	integer-value
46	large-analog-value
47	octetstring-value
48	positive-integer-value
49	time-pattern-value
50	time-value
51	notification-forwarder
52	alert-enrollment
53	channel
54	lighting-output
55	binary-lighting-output
56	network-port
57	elevator-group
58	escalator
59	lift
60	staging
61	audit-log
62	audit-reporter
63	color (newer)
64	color-temperature (newer)

Values come from the open-source bacnet-stack 1.6.1 (bacenum.h), which follows ANSI/ASHRAE Standard 135, and were cross-checked one by one against two other independent BACnet stacks (bacpypes and @bacnet-js/client). Entries marked (newer) are in bacnet-stack only, because the other two stacks predate them. Numbers 0-255 (and the higher ASHRAE ranges) are standard; vendors may use proprietary numbers above them.

More BACnet reference

Easy BACnet reads these values straight off the device from an Android phone and shows them as words, not numbers.