CIDR calculator

Runs entirely in your browser. Useful for reading IP reports, ACLs, and route announcements.

CIDR block

Result

Canonical CIDR

2400:cb00:ccf3:0000:0000:0000:0000:0000/48

Version

IPv6

Prefix

/48

Network

2400:cb00:ccf3:0000:0000:0000:0000:0000

Broadcast

n/a (IPv6)

First address

2400:cb00:ccf3:0000:0000:0000:0000:0000

Last address

2400:cb00:ccf3:ffff:ffff:ffff:ffff:ffff

Netmask

ffff:ffff:ffff:0000:0000:0000:0000:0000

Wildcard

n/a

Total addresses

1208925819614629174706176

Usable hosts

1208925819614629174706176