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SubnetOnline.com

"Your online IP subnet calculator and network tools collection..."

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IP Subnet Calculator

Credits: Andy Povey.
Thanks to Andy Povey for developing and providing the source code for this IP subnet calculator.

This is a more straightforward and faster IP subnet calculator, giving you a complete list of information concerning an IP address and Subnet Mask, including the Network and Host address size.

Enter IP Address and Subnet Mask	Results
IP Address	Start Host Address
Subnet Mask	End Host Address
	Max No. of Hosts



	Network Address

Additional Information To determine range in which an IP address falls enter address and subnet mask (as dotted decimals) in fields above and press "Calculate". (Requires a version 4.x browser or higher)
	Broadcast Address
	Network Class
	Network Address Size	Bits
	Host Address Size	Bits