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Quick-VLSM Calculator

Step 1: Enter your Address Block Address and CIDR mask: (example: 205.68.24.0/20)

Step 2: Add Networks:

Enter the number of addresses you will need in each network,
after applying the scalability percentage.
After entering the number for each network,
click add or press Enter to add another network.

(
example: You need 1 network with 50 addresses,
1 network with 217 addresses and 1 point-to-point link.
Simply type 50 [Enter] 217 [Enter] 2 [Enter])

 
Networks Added:

     

Quick-VLSM Calculator Version 1.4
Created By Louis Chanady, 2004
Edited By David Billings, 2005