Application for an IPv4 Multicast Address

Do you need a globally unique address?

• Yes
• No (Note: This option means that you can use a private use address, also known as administratively scoped address. 239.0.0.0/8 is set aside for this purpose, and a breakdown of the scope can be found in section 8 of BCP 23)

If you answered "Yes" and wish to proceed, explain why you need a globally unique address.

Do you have an AS Number from the range 1-64495?

• Yes (This means that you already have 256 unique multicast addresses. Unless you have already used most of these addresses, you should make use of this GLOP space before submitting this request.)
• No

Please explain why you can not use GLOP.

Do you have at least one unicast /24 of address space that is not tied to your upstream ISP?

• Yes (Note: This means you already have a unique multicast address for each unicast /24 you have. See RFC 6034.)
• No

Please explain why you can not use RFC 6034.

Are you able to use Source-specific Multicast (SSM)?

• Yes (Note: you should use SSM, see RFC 4604 and RFC 4607)
• No

Please explain why it is not possible to use SSM.

In which block are you requesting an assignment?

• Local Network Control Block (RFC 5771, section 3)
• Internetwork Control Block (RFC 5771, section 5)
• AD-HOC Block (RFC 5771, Section 6)
• Other

If Other, explain your requirement.

Are you using a link local protocol?

• Yes
• No

If yes, please explain your proposed use of the multicast address

Are you using a global protocol?

• Yes
• No

If yes, please explain your proposed use of the multicast address

What is the protocol on the network?

If the proposed multicast use is for a new application or protocol for wide distribution, please describe the following:

• What message formats are used?
• What message types are used?
• What message op codes are used?
• What message sequences are used?

What functions are performed by this protocol?

How is multicast used by this application?

Have you or your organisation requested globally unique IPv4 or IPv6 multicast addresses before?

• Yes
• No

If yes, and you received a multicast assignment, please list all addresses assigned:

If yes, and you did not receive a multicast assignment, please let us know which IANA ticket number your request was evaluated in, if available. The ticket number is listed in the subject line of the emails you received from us.

Will you need the proposed assignment for a defined period or for the foreseeable future? If you will need the assignment for a defined period please indicate the length of time you will need the assignment for here:

• Defined period — Time period:
• Indefinite

If your proposed use of the multicast address is described in an Internet-Draft or other specification, provide a reference here:

If you need more than one multicast address, please state how many you need, as an integer, and why you need that many addresses.

Number of addresses:

What name do you want associated with this multicast address? The name should be representative of the proposed use of the address.

Provide any additional information not described above that would assist the expert in reviewing your application.