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Archive for November, 2017

IP CIDR rules and address ranges

November 3rd, 2017

I always forget IP address range coverage rules and forget where to look.

It’s the wiki!

https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

and for good reference here is the table:

/32 is for a single address

/24 is for a range in the last place x.x.x.0

/16 is for a range in the last 2 places x.x.0.0

Screen Shot 2017-11-03 at 11.28.31 AM

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