The "IP-Address-Mask" AVP

The "IP-Address-Mask" Diameter AVP, which is of type Grouped, uses the AVP code "522".

It has the MANDATORY flag.

It is part of the From-Spec, To-Spec grouped AVPs.

It is a grouped AVP, which can hold the following nested AVPs:

AVP code	AVP name	AVP type	AVP requirement
518	IP-Address	IPAddress
523	IP-Mask-Bit-Mask-Width	Unsigned32

Its AVP-header format definition is the following:

< IP-Address-Mask > ::= < AVP-Header: 522 > 
* [ IP-Address ]
* [ IP-Mask-Bit-Mask-Width ]

Update source	Insertion date
Wireshark	2026-04-26 07:12