Download a list of manufacturers having assignments of IEEE 1451.4
URN's.
URN Block assignment fee; $1,200.00 (US).
Fee Pricing List
Products
Services
Fees (ea)
Total Due
URN Block
Block(s) Assignment
$1,200.00 (US)
$1,200.00 (US)
The URN is a 64-bit unique identifier utilized to ensure unique
access to IEEE 1451.4 TEDS memory devices arranged in a multi-drop
two conductor network as described in IEEE Std 1451.4-2004. (see
IEEE Std 1451.4.2004 subclause 5.4, figure 2) Users purchasing
commercially available node devices for use in their products
do not need additional URN codes, since a URN is contained in
each purchased device.
Organizations wishing to design devices emulating the operation
of commercially available nodes, with an ASIC or micro-controller
for example, for use in 1451.4 systems, must obtain URN codes
for installation, one per device. The IEEE 1451.4 URN is arranged
as below. The system reads the URN least-significant bit first.
IEEE Std 1451.4 URN Bit Map
ms bit
ls bit
Owner calculated
CRC code
(8 bits)
Owner assigned device serial number
(12 bits, 4096 numbers)
IEEE assigned Block Number (36 bits) 68.7
billion blocks available
1451.4 Family Code (8 bits)
0-FF hex
000-FFF hex
000000000 - FFFFFFFFF hex
FD hex
The IEEE Registration Authority will assign blocks of 4,096 individual
URN's to any organization, from the IEEE pool of 68.7 billion
blocks. The IEEE will assign up to 10 blocks per purchase. The
IEEE does not accept requests for applicant-specified assignments.
Please call the IEEE at the phone number listed if you have questions
concerning the completion of this form.
NOTICE: As the end user, there may be intellectual property
issues associated with the use of the Unique Registration Numbers
(URN) that you are responsible to ascertain and satisfy. The issues
may require that you purchase a license(s) and pay a royalty to
third parties who claim ownership to said intellectual property.
It is strongly recommended that before you purchase a URN, you
review the IEEE Standards Association patent database at http://standards.ieee.org/db/patents/index.html
to obtain some of the information that may be relevant to obtaining
your URN.
