[jodrellblank]

16.7 million or so.

IPv4 is a 32 bit address space, so it tops out around 4.2 billion total.

17.0.0.0/8 is locking down the first 8 bits, giving 2^(32-8) variable bits, or there are only 256 possible first octets and this is one so it’s 1/256th of 4.2 billion addresses.

[koolba]

It’s even more when you factor in link local and private network ranges.

[manigandham]

Everybody has those for themselves.

[koolba]

That’s what I’m saying. The set of addresses allocated to Apple (in their /8) is an even larger ratio as the private ranges don’t count towards the denominator.