https://devzone.nordicsemi.com/f/nordic-q-a/24891/what-is-numbers-of-4-sig-fixed-group-addressesDoes anybody knows exact number of the &quot;4 SIG fixed group addresses&quot;? Is it 0x00? or other? In the SIG document, there is below chapter. Group Addresses A Group Address is a multicast address which represents one or more Elements. Groupen-USTelligent Community 13Mon, 04 Sep 2017 09:32:45 GMThttps://devzone.nordicsemi.com/thread/98003?ContentTypeID=1Mon, 04 Sep 2017 09:32:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6c584a92-2773-4a21-9b02-d8ee56d8468fthst<p>little further down it is defined.</p> <p>3.4.2.4 Group address: {page 42}</p> <p>Values Fixed Group Address</p> <ul> <li>0xFF00–0xFFFB RFU</li> <li>0xFFFC all-proxies</li> <li>0xFFFD all-friends</li> <li>0xFFFE all-relays</li> <li>0xFFFF all-nodes</li> </ul> <p>Table 3.4: Fixed group addresses</p><div style="clear:both;"></div>