Network Size Considerations
The following table shows the address space associated with each address block prefix assignable using Classless Inter-Domain Routing (CIDR).
|# of IP Addresses||Address Block Prefix|
Note that for each address block prefix, the number of addresses shown includes the network and broadcast addresses.
CIDR Network Calculator
Calculate the network parameters for a CIDR address.
|Valid input for the calculator includes:|
|address block prefix||/19|
|subnet mask (hex)||0xffffffc0|
|IP address/address block prefix||192.168.10.56/26|
|IP address/subnet mask||192.168.0.13/255.255.255.0|
|IP address/subnet mask (hex)||192.168.0.13/0xffffff00|
|IP address/wildcard bits||192.168.0.169/0.0.0.127|
Omitting an IP address in the input will return:
- address block prefix
- subnet mask
- subnet mask (hex)
- wildcard bits
- number of usable IP addresses
cluding an IP address in the input will return the above values plus:
- network address
- broadcast address
- first usable IP address
- last usable IP address