So from the looks of it ...:
-Calls to INum via VoXalot are still not working
-VoXBone has submitted their numbers into 164.arpa ... which means the connection that's bein observed lately is due to ENUm lookup (and the server they've sumbitted is reported to require this 5 Digit pin).
See
SIP Sorcery Community Forums • View topic - sys.ENUMLookup for iNum 883 numbers