WORLD IPV6 LAUNCH is 6 June 2012 - The Future is ForeverIPv6-only Test  |  Dual-Stack (IPv6 & IPv4) Test  |  IPv4-only TestWORLD IPV6 LAUNCH is 6 June 2012 - The Future is Forever
Home (v4-only)  |  IPv6 Address Calculator  |  IPv6 Prefix Calculator  |  IPv6 Prefix Table (v6-only, big)  |  MTU Test
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:


Contact me here if you have any issues with this site.
The current time is 2021-06-19 14:45:42 UTC (+0000).
This page was last modified on 2018-09-22 19:30:44 UTC (+0000).
This page has received 98447 hits since January 14 2011.