View OpenLCB Unique ID Ranges

This page shows the ranges of OpenLCB Unique ID's that have been assigned to date.

For more information on OpenLCB, please see the documentation page. For more information on OpenLCB unique ID assignment, please see the current draft specification and technical note.

Range. '*' means that any values are accepted in that byte.						Delegating organization or person	Comment
0	*	*	*	*	*		Reserved; Leading 0 byte indicates uninitialized or non-standard Node ID
1	*	*	*	*	*	OpenLCB Group	Reserved for well-known global identifiers
2	*	*	*	*	*	OpenLCB Group	Manufacturer-specific assignments
3	*	*	*	*	*	OpenLCB Group	Self-assigning groups space
4	*	*	*	*	*	OpenLCB Group	Individual UIDs allocated by automated requests
5	*	*	*	*	*	OpenLCB Group	Specifically assigned ranges
6	*	*	*	*	*	OpenLCB Group	Locomotive control systems
7	*	*	*	*	*	OpenLCB Group	(tentative) RFID messages as events, need 3 bytes in NID for 40 bit tag
255	*	*	*	*	*		Reserved, indicates an error e.g. reset non-volative memory

Reserved; Leading 0 byte indicates uninitialized or non-standard Node ID

Range. '*' means that any values are accepted in that byte.						Delegating organization or person	URL	Comment
0	0	0	0	0	0			Reserved; convenient value for "No valid node ID assigned"

Reserved for well-known global identifiers

Range. '*' means that any values are accepted in that byte.						Delegating organization or person	Comment
1	1	0	0	0	0		Reserved for well-known EventIDs (see EidAllocations sheet; this is referred to as "OpenLCB vnode" there)
1	1	1	*	*	*		Reserved for CBUS-defined EventIDs (specifically when last two bytes zero); see EidAllocations sheet, where this is referred to as "CBUS vnode"
1	99	*	*	*	*	OpenLCB Group	XpressNet translation
1	129	*	*	*	*	OpenLCB Group	LocoNet packet transport
1	238	*	*	*	*	OpenLCB Group	DCC translation

Manufacturer-specific assignments

Range. '*' means that any values are accepted in that byte.						Delegating organization or person	Comment
2	1	*	*	*	*		Manufacturer space bank 1 (by NMRA Mfg ID byte)
2	1	13	*	*	*		DIY (shared unmanaged space, not recommended for individual use)
2	1	18	*	*	*	JMRI	JMRI (e.g. for use in software solutions)
2	1	235	*	*	*		MERG
2	1	238	*	*	*		NMRA reserved

Self-assigning groups space

Range. '*' means that any values are accepted in that byte.						Comment
3	0	*	*	*	*	NMRA member number assignments
3	4	*	*	*	*	MERG member number assignment
3	8	*	*	*	*	CBUS - for mapping existing modules, using the "Layout ID" etc defined by CBUS

Individual UIDs allocated by automated requests

Range. '*' means that any values are accepted in that byte.						Delegating organization or person	URL	Comment
4	0	0	*	*	*	OpenLCB Group		Allocated through OpenLCB.org

Specifically assigned ranges

Range. '*' means that any values are accepted in that byte.						Delegating organization or person	URL	Comment
5	1	0	0	*	*	OpenLCB Group		8-bit assigned ranges
5	1	1	1	1	*	David Harris
5	1	1	1	2	*	Alex Shepherd
5	1	1	1	3	*	Bob Jacobsen
5	1	1	1	4	*	SPCoast		For experimental and prototype efforts
5	1	1	1	5	*	Greg Oberfield
5	1	1	1	6	*	TCH Technology	http://www.tchtechnology.com	Hello, not sure I needed this, I already have a NMRA number. Thanks Tim
5	1	1	1	7	*	Mustangpeak
5	1	1	1	8	*	Tom Andersen
5	1	1	1	9	*	Railflyer Technologies Inc.
5	1	1	1	10	*	Telecom Paristech
5	1	1	1	11	*	Geoffrey Crick
5	2	*	*	*	*	OpenLCB Group		16-bit assigned ranges
5	2	1	2	*	*	Railstars
5	3	*	*	*	*	OpenLCB Group		24-bit assigned ranges

Locomotive control systems

Range. '*' means that any values are accepted in that byte.						Delegating organization or person	Comment
6	0	*	*	*	*	OpenLCB Group	DC system
6	1	*	*	*	*	OpenLCB Group	DCC operated
6	2	*	*	*	*	OpenLCB Group	TMCC operated
6	3	*	*	*	*	OpenLCB Group	Marklin/Motorola system
6	4	*	*	*	*	OpenLCB Group	MTH DCS