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Your address is .

Use this form to calculate the number of subnets (N) of a given subnet prefix length (S) you can obtain from a given aggregate prefix length (A).

Aggregate prefix length (A):  / (decimal value in range 0 through 127)
Subnet prefix length (S):  / (decimal value in range (A+1) through 128 (will be inaccurate where A-S is >54))
Available subnets (N):
Aggregate prefix mask:
Aggregate wildcard mask:
Subnet prefix mask:
Subnet wildcard mask:
Aggregate / Subnet XOR:


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The current time is 2017-01-20 19:55:56 UTC (+0000).
This page was last modified on 2014-12-02 15:46:36 UTC (+0000).
This page has received 69690 hits since January 14 2011.