You're right that it indicates a range of addresses, the number after the slash is the number of starting bits that the addresses all share. Check out CIDR Blo

You're right that it indicates a range of addresses, the number after the slash is the number of starting bits that the addresses all share. Check out CIDR Blocks for a more complete answer: https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing#CIDR_blocks https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing...