CIDR notation is how you notate these; Apple owns 17.0.0.0/8; the /8 meaning "8 bits identify the network portion", so just the first octet, or the 17. https:/

CIDR notation is how you notate these; Apple owns 17.0.0.0/8; the /8 meaning "8 bits identify the network portion", so just the first octet, or the 17. https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing#CIDR_notation https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing... Coincidentally, CIDR doesn't conflict with the HN comment syntax. Sometimes shortened to 17/8, but… I wouldn't recommend that.