Status: alpha

CIDR cutter

Carve out IPs/CIDRs from larger ranges and get the biggest possible subnets (IPv4+IPv6).

Compute Include − Exclude and return the biggest possible CIDR blocks (IPv4 + IPv6).

Include 100.64.0.0/10 (CGNAT)

One per lineComma-separated

IncludeCIDRs and single IPs accepted (single IPs become /32 or /128).ExcludeAnything here is removed from the Include space.

5 blocks (IPv4: 4, IPv6: 1)

Result

10.0.0.0/8
100.64.0.0/10
172.16.0.0/12
192.168.0.0/16
fc00::/7