Frequently Asked Questions:

Registration Authority


What is an Organizationally Unique Identifier (OUI)/"company_id"?

What is an Individual Address Block (IAB)?

What is an EtherType Field?

What are other names associated with OUI and IAB?

How can I obtain a MAC/Ethernet Address?

How can I obtain an assignment of an OUI or an IAB?

[What are the costs involved in obtaining an OUI, IAB or EtherType Field assignment?]

What is the cost and what method of payment can I use to purchase an OUI, an IAB or EtherType Field?

What standards [are involved with OUI and] utilize the OUI and/or IAB?

How can I obtain the names and ID numbers of those companies who own an Ethernet/OUI number, an IAB or an EtherType Field?

Can I re-sell or distribute a segment of the OUI after I obtain it?

My company wants a second ID number for our new project. Can we receive one?

How can I obtain an EtherType Field registration?

What if the company address or contact information changes after I have received the OUI, IAB and/or EtherType Field?

My organization is writing a standard or specification that will include use of the OUI. How do I make sure this is okay with the IEEE RA?

Can my assignment be used with Bluetooth?

What if I have additional questions about OUIs, IABs or EtherTypes?

My company has consumed ½ of the MAC-48 address space to distinctively identify networking cards in desktop computers. Another division is planning to produce laptop computers. Should that division apply for a different OUI/company_id identifier?

In my company, division A has consumed ½ of the MAC-48 address space to distinctively identify networking cards. Now division B plans to produce IEEE Std 1394-1995 nodes, which have distinctive EUI-64 identifiers. Can we use the existing OUI/company_id identifier to generate these EUI-64 node identifiers?

My group is designing an IEEE Std 1394-1995 networking node, which has MAC-48 and EUI-64 identifiers in the 1394 and network interfaces respectively. Since both identifier effectively identify the same node, could the MAC-48 identifier be extended to form the EUI-64?

I would like to distinctively identify software objects, or files stored on a disk drive. Can I use an EUI-64 identifier for this purpose?


What is an Organizationally Unique Identifier (OUI)/"company_id"?

An OUI / "company_id" is a 24-bit globally unique assigned number referenced by various standards. For example, the OUI is used in the family of 802 LAN standards: Ethernet, Token Ring, etc. The OUI is usually concatenated with another 24 bits that are assigned by that Organization in order to make a 48-bit number that is unique to a particular piece of network hardware, to make it possible to uniquely address that hardware. For example, the Ethernet MAC Address is such a 48-bit number, unique to one particular Ethernet interface. To form a unique network address, the OUI is [usually] concatenated with 24 or 40 bits to form an EUI-48 or an EUI-64. There are other uses of the OUI however, such as its use as a company identifier in the SNAP protocol. {prefer to find a more appropriate example, perhaps an OUI followed by private protocol information}


What is an Individual Address Block (IAB)?

An Individual Address Block is for people who need [less than 4097] no more than 4096 unique 48-bit numbers (EUI-48) and thus find it hard to justify buying their own OUI. The IAB is a particular OUI belonging to the IEEE Registration Authority, concatenated with 12 additional IEEE-provided bits, leaving only 12 bits for the owner to assign [to his] (up to 4096) individual devices.


What is an Ethernet Type field?

The Length/Type field in an Ethernet/802.3 data frame is simply called a Type field, when used to identify the protocol (as opposed to specifying the frame’s length). The Type field provides a context for interpretation of the data field of an Ethernet/802.3 data frame (protocol identification). Refer to IEEE Std 802.3, clause 3 and especially sub-clauses 3.1.1 and 3.2.6. See also IEEE Std 802 sub-clause 10.4.


What are other names associated with OUI and IAB?

[Other values, that can be formed by appending the OUI/IAB values with other fields, include the following: MAC Address, Vendor Address, Vendor ID, NIC Address, Ethernet Address and others.]

Other values, that can be formed by appending the OUI/IAB values with required number of bits to fully form an individual address. Names for such addresses include the following: MAC Address, Vendor Address, Vendor ID, NIC Address, Ethernet Address, EUI-48, and EUI-64.

How can I obtain a MAC/Ethernet address?

You must first have an OUI or an IAB, to which you then append 24 or 12 bits respectively, in a way that makes the resulting 48-bit number unique. [I.e.,]Your 24 or 12 bits must be unique within your organization, which will require coordination among all the users of your organization's OUI or IAB.


How can I obtain an assignment of an OUI or an IAB?

You can download the OUI application here after checking the public listings to determine whether your company already has an assignment.

You can download the Individual Address Block application here after checking the public listings to determine whether your company already has an assignment.

If the company already has an assignment, send an e-mail to the IEEE Registration Authority requesting the contact information for the company, and then make arrangements within your company to use your existing OUI or IAB.

Once the application is completed successfully, the Requestor will receive an e-mail with a tracking number and payment information. The application will be processed within seven days after receipt of payment as long as there are no problems with the information on the application or the payment. The Requestor will receive an e-mail with the assignment information once the application is processed.


[What costs are involved with obtaining an OUI, IAB or EtherType Field?

The OUI is $1,650.00 (US); the IAB is $550.00 (US) and the EtherType Field is $2,500.00 (US). The only other fees that would be involved is a $15.00 bank fee that is only applicable with the wire transfer payment method and a fee for private status on the public listing. There are no annual fees.]


What is the cost and what method of payment can I use to purchase an OUI, an IAB or EtherType Field?

The OUI is $1,650.00 (US); the IAB is $550.00 (US) and the EtherType Field is $2,500.00 (US). The only other fee that would be involved is a $15.00 bank fee that is only applicable with the wire transfer payment method and a fee for private status of the public listing. There are no annual fees.

The IEEE accepts checks (payable to IEEE Standards Dept.), purchase orders, wire transfers, as well as American Express, VISA, Master Card, Diners Club and Discover Card.


[What standards are involved with OUI and IAB?]

What standards utilize the OUI and/or company_id?

[This] A single assignment covers both OUI (802) and "company_id". Although a single assignment is provided, the same value is known by different names in different standard families. Its applications are

a)

The OUI defined in IEEE Std 802-2001 can be used to generate 48 bit Universal LAN MAC addresses to identify LAN and MAN stations uniquely, and Protocol Identifiers to identify public and private protocols. These are used in Local and Metropolitan Area Network applications. The relevant standards include CSMA/CD (IEEE Std 802.3, ISO 8802-3), Token Bus (IEEE Std 802.4, ISO 8802-4), Token Ring (IEEE Std 802.5, ISO/IEC 8802-5), IEEE Std 802.6 (ISO/IEC DIS 8802-6), FDDI (ISO 9314-2) and WLAN (IEEE 802.11, ISO/IEC 8802-11) .


b)

The "company_id" defined in IEEE Std 1212-1991, IEEE Standard Control and Status Register (CSR) Architecture, is referenced by IEEE Std 896.2-1991, IEEE Standard for Futurebus+(TM) Physical Layer Specification and Profiles, and IEEE Std 1596-1992, IEEE Standard for Scalable Coherent Interface, as well as IEEE Std 1394-1995, IEEE Standard for a High Performance Serial Bus. In this context, the 24-bit company_id value is a portion of a 48-bit [32-b Module_Vendor_Id ROM location (and related locations) and] identifier that uniquely identifies hardware [vendors] and I/O software interface architectures. Also included is ANSIX3.230-1994 Fibre Channel Standard.


How can I obtain the names and ID numbers of those companies who own an Ethernet/OUI number, an IAB or an EtherType Field?

The latest available version of the OUI and Individual Address Block assignments can be found here on the IEEE Standards website. The EtherType Field public listing is located here.


Can I resell or distribute a segment of the OUI after I obtain it?

No. A parent company and a subsidiary company can share an OUI and if a company is sold, the OUI may be transferred to the new company. However, the OUI cannot be sold or distributed by anyone other than IEEE.

However, a company may resell individual EUI-64 identifiers, based on unique extensions to their purchased OUI values.


My company wants a second ID number for our new project. Can we receive one?

The Registration Authority requires that you use 95% of the existing assignment's 48-bit numbers before a second number can be issued to you. You may use a separate subset of the original assignment's 48-bit numbers for your new project.

If this requirement cannot be met, the IEEE can issue an additional assignment to your company providing you send a letter on company letterhead stating that you will not ship product on the new assigned number until 95% of the existing number is used. Your company must use care to ensure that large numbers of the 48-bit numbers are not left unused. Exceptions to this policy are rarely granted.


How can I obtain an EtherType field registration?

For registration information, please click here.


What if I my company address or contact information changes after I receive the OUI, Individual Address Block and/or EtherType field?

Please fax or mail a letter on company letterhead noting the changes (new company name, contact name, contact job title, address, phone, fax, e-mail address) with a press release or some details of the company name change to the IEEE Registration Authority at +1 732-562-1571.


My organization is writing a standard or specification that will include the use of a specific OUI. How do I make sure this is okay with the IEEE RA?

The IEEE Registration Authority requests that any organization that intends to utilize the Organizationally Unique Identifier in the standardization of a technical area that has not previously been reviewed and approved by the IEEE, please contact the IEEE Registration Authority.

The IEEE Registration Authority requests that any organization that intends to utilize the Organizationally Unique Identifier in the standardization of a technical area that has not previously been reviewed and approved by the IEEE, please contact the IEEE Registration Authority well in advance of when you believe that the value should appear in the draft. The utmost care must be taken to assure that any representation in the draft, before a value is assigned, will not be mistaken for an assigned value. To that end the following example is appropriate:
Assigned OUI [XX-XX-XX] (the appropriate value will be procured from the IEEE Registration Authority and inserted in the draft immediately prior to Sponsor Ballot.)
 

My organization is writing a standard or specification that requires vendor use of an OUI. How do I make sure this is okay with the IEEE RA?

The IEEE Registration Authority requests that any organization that intends to utilize the Organizationally Unique Identifier in the standardization of a technical area that has not previously been reviewed and approved by the IEEE, please contact the IEEE Registration Authority.

The IEEE Registration Authority requests that any organization that intends to utilize the Organizationally Unique Identifier in the standardization of a technical area that has not previously been reviewed and approved by the IEEE, please contact the IEEE Registration Authority well in advance of when you believe that the description should appear in the draft.

The utmost care must be taken to assure that any representation of an OUI in the draft will not be mistaken for an assigned value.


Can my assignment be used with Bluetooth?

The assignment can be used with Blueooth. Please either refer to the IEEE 802.15.1-2002 standard or the Bluetooth website for more information.


What if I have additional questions about OUIs, IABs or EtherTypes?

For further information, contact IEEE Registration Authority.


My company has consumed ½ of the MAC-48 address space to distinctively identify networking cards in desktop computers. Another division is planning to produce laptop computers. Should that division apply for a different OUI/company_id identifier?

No. The organization is responsible for consuming a preponderance of its MAC-48 address space before requesting an additional OUI/company_id identifier. To avoid duplicate address assignments, a central authority should assign blocks of MAC-48 address space to each division, on a demand basis, until all blocks have been consumed.


In my company, division A has consumed ½ of the MAC-48 address space to distinctively identify networking cards. Now division B plans to produce IEEE Std 1394-1995 nodes, which have distinctive EUI-64 identifiers. Can we use the existing OUI/company_id identifier to generate these EUI-64 node identifiers?

Yes. The same OUI/company_id identifier can be used to generate these EUI-64 identifiers.


Do the previously assigned MAC-48 addresses affect the assignment of future EUI-64 identifiers?

Previously consumed MAC-48 addresses have no effect on the assignment of future EUI-64 identifiers.


My group is designing an IEEE Std 1394-1995 networking node, which has MAC-48 and EUI-64 identifiers in the 1394 and network interfaces respectively. Since both identifier effectively identify the same node, could the MAC-48 identifier be extended to form the EUI-64?

Yes. A valid (known to be unique) EUI-64 can be generated by encapsulating the MAC-48 identifier, as described in:
GUIDELINES FOR 64-BIT GLOBAL IDENTIFIER (EUI-64) REGISTRATION AUTHORITY
subclause
Restricted and encapsulated values.


I would like to distinctively identify software objects, or files stored on a disk drive. Can I use an EUI-64 identifier for this purpose?

No. When the volume of identifiers exceeds the one-per-hardware-instance volume, a larger identifier should be used. For example, files on a disk could be identified by concatenating an EUI-64 (that uniquely identifies the disk) with a 64-bit time stamp or sequence number.

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