View the Addresses of IP Subnets at LBNL, NERSC and JGI (LBNL login required).
This page uses CIDR “slash” notation. Below is a reference table for commonly used subnet sizes in CIDR notation and their corresponding Subnet Mask notation:
| CIDR “slash” notation | Subnet Mask Notation |
|---|---|
| /19 | 255.255.224.0 |
| /20 | 255.255.240.0 |
| /21 | 255.255.248.0 |
| /22 | 255.255.252.0 |
| /23 | 255.255.254.0 |
| /24 | 255.255.255.0 |
| /25 | 255.255.255.128 |
| /26 | 255.255.255.192 |
| /27 | 255.255.255.224 |
| /28 | 255.255.255.240 |
| /29 | 255.255.255.248 |
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