IPv6 CIDR Calculator
This table shows how many /48s and /56s in larger IPv6 subnets.
| IPv6 Prefix | /48s | /56s |
|---|---|---|
| /29 | 512 K | 128 M |
| /30 | 256 K | 64 M |
| /31 | 128 K | 32 M |
| /32 | 64 K | 16 M |
| /33 | 32 K | 8 M |
| /34 | 16 K | 4 M |
| /35 | 8 K | 2 M |
| /36 | 4 K | 1 M |
| /37 | 2 K | 512 K |
| /38 | 1 K | 256 K |
| /39 | 512 | 128 K |
| /40 | 256 | 64 K |
| /41 | 128 | 32 K |
| /42 | 64 | 16 K |
| /43 | 32 | 8 K |
| /44 | 16 | 4 K |
| /45 | 8 | 2 K |
| /46 | 4 | 1 K |
| /47 | 2 | 512 |
| /48 | 1 | 256 |