IP Subnet Calculator for IPv4/v6
Perfect for supporting your IPv4 network.
Perfect for learning Pv6. Perfect for migration.
One of the most popular IP Subnet
Calculators in use today was
pioneered by Net3 Group, a company formed by Bitcricket founder J. Scott
Haugdahl and subsequently acquired by WildPackets. Bitcricket ushers in
a modern era rewrite of this tool,
improving upon the precedent set by the original with a refreshed GUI, native Windows
or Mac operation, and support for IPv6.
- Calculate Subnets Automatically.
Simply input an IP address and choose one of the following:
number of subnet bits, the maximum number of desired subnets, the
number of host bits, or the
maximum number of desired hosts. Our calculator figures out the
all the rest, giving you a bit-by-bit address visualization and
generating a complete table of subnets. Quick.
- Calculate CIDR Routes. Classless Interdomain
Routing, also known as "supernetting," allows
multiple IP routes (especially Class C) to be aggregated into a
smaller set of routing table entries. Just as with subnetting, the
subnet calculator makes it easy to visualize and generate CIDR information.
- Migrate to IPv6.The Bitcricket subnet calculator is the first to support
IPv6. Although there are no subnets in IPv6 per se (and thus
no subnet masks), there are several
different types of IPv6 addresses and bits/fields within those
types have different interpretations. Simply enter an IPv6 address and we
classify and dissect it for you. Furthermore, the calculator helps you
migrate from IPv4 to IPv6 by supporting the 6 different IPv6
flavors that embed IPv4.
- Work on a PC or a Mac. Our calculator runs
natively on both Windows and MacOS X. The latest versions of
these two operating systems natively support IPv6 by default.
- Auto Discover Configured Addresses.
The calculator automatically discovers locally configured IPv4
and IPv6 addresses on both Windows and Mac, allowing you to
quickly classify and dissect them.
- Export Your Data. The information presented
in our calculator is a
mere cut-and-paste away into your favorite spreadsheet, word
processor, or email.
Do you have a feature you'd like added to the IP Subnet Calculator? Please email your ideas to
IP Subnet Calculator screenshots from Vista. Click for a
IP Subnet Calculator screenshots from MacOS X. Click for a