Are you a network administrator who need to calculator and assign IP address for your workstations and servers or view the subnet host address range of your network It is not an easy job for ordinary users or beginners to calculate their subnet configuration. Want to manage your network as easy as possible The IP address calculator is a great assistant for you. Here I will recommend a powerful yet easy-to-use IP address calculation tools to you. That is IP Subnet Calculator. Following is the detailed introduction of this network administrator tool.

IP Subnet Calculator is a popular freeware Windows 95/98/NT/2000 utility for computing information about IP addresses. Refined over the years, the IP Subnet Calculator is now in its third release, and is also part of our commercial product, the multi-purpose Network Calculator. IP Subnet Calculator enables subnet network calculations using network class, IP address, subnet mask, subnet bits, mask bits, maximum required IP subnets and maximum required hosts per subnet. Results of the subnet calculation provide the hexadecimal IP address, the wildcard mask, for use with ACL (Access Control Lists), subnet ID, broadcast address, the subnet address range for the resulting subnet network and a subnet bitmap. The subnet calculator implements a classful/classed IP addressing scheme where the following rules are adhered to: Class A addresses have their first octet in the range 1 to 126 (binary address begins with 0). Class B addresses has their first octet in the range 128 to 191 (binary address begins with 10). Class C addresses have their first octet in the range 192 to 223 (binary address begins with 110). The subnet calculator allows the use of a single subnet bit - for example, a class C address with a subnet mask of 255.255.255.128 is permitted. The subnet calculator allows a subnet ID to have its final octet equal to the final octet of its subnet mask - for example, a class C network address of 192.168.0.192 with a subnet mask of 255.255.255.192 is permitted. The above is generally accepted as being 'normal', however, certification students should keep in mind that, in some certification programs, the final two points are regarded as unacceptable. For classless subnetting, we can use the CIDR calculator.

The key functions and benefits of IP Subnet Calculator include:

1. With IP Subnet Calculator we can get an IP class A, B or C address, several pieces of information can be displayed about that address by selecting one of four tabs: the Address Info, Subnet Info, Subnet/Hosts or CIDR tab.

2. The Address Info Tab displays the class of address and range of addresses for that class, a color-coded bit map for that class of address, the binary representation of that address, and the hexadecimal representation of the address.

3. The Subnet Info Tab allows us to enter subnet information in five different ways: by number of subnet bits, number of total mask bits, number of subnets, number of hosts, or just the subnet mask in dotted decimal notation. For the information entered, the Calculator generates a color-coded bit map breaking down the network, subnet and host portion, shows us the subnet host address range, the subnet ID and subnet broadcast address.

4. The Subnet/Hosts Tab generates a table showing the subnet ID, host range of IP addresses, and the subnet broadcast address over a range of user-selectable subnets.

5. The CIDR (Classless Inter-Domain Routing) Tab is particularly interesting for ISPs or corporations with many Class C addresses as it displays information on supernetting (collecting multiple IP addresses together). Within the CIDR Tab, we can enter an IP address and the number of supernet bits we wish to use, and the Calculator will display the number of possible supernets and their address allocation range. The route address and supernet masks used are displayed in dotted decimal and dotted hexadecimal notation.

In a word, IP Subnet Calculator is a powerful yet easy-to-use IP address calculator which can meet almost any needs of ours. What are you waiting for Download and try it now!

Utility for computing information about IP addresses
The IP Subnet Calculator is a popular freeware Windows 95/98/NT/2000 utility for computing information about IP addresses. Refined over the years, the IP Subnet Calculator is now in its third release, and is also part of our commercial product, the multi-purpose Network Calculator.
WildPackets IP Subnet Calculator is a utility for computing information about IP addresses. Given an IP class A, B or C address, several pieces of information can be displayed about that address by selecting one of four tabs: the Address Info, Subnet Info, Subnet/Hosts or CIDR tab. The Address Info Tab displays the class of address and range of addresses for that class, a color-coded bit map for that class of address, the binary representation of that address, and the hexadecimal representation of the address. The Subnet Info Tab allows you to enter subnet information in five different ways: by number of subnet bits, number of total mask bits, number of subnets, number of hosts, or just the subnet mask in dotted decimal notation. IP Subnet Calculator generates a color-coded bit map breaking down the network, subnet and host portion, shows you the subnet host address range, the subnet ID and subnet broadcast address.

Features
Given an IP class A, B or C address, several pieces of information can be displayed about that address by selecting one of four tabs: the Address Info, Subnet Info, Subnet/Hosts or CIDR tab.

The Address Info Tab displays the class of address and range of addresses for that class, a color-coded bit map for that class of address, the binary representation of that address, and the hexadecimal representation of the address.
The Subnet Info Tab allows you to enter subnet information in five different ways: by number of subnet bits, number of total mask bits, number of subnets, number of hosts, or just the subnet mask in dotted decimal notation. For the information entered, the Calculator generates a color-coded bit map breaking down the network, subnet and host portion, shows you the subnet host address range, the subnet ID and subnet broadcast address.
The Subnet/Hosts Tab generates a table showing the subnet ID, host range of IP addresses, and the subnet broadcast address over a range of user-selectable subnets.
The CIDR (Classless Inter-Domain Routing) Tab is particularly interesting for ISPs or corporations with many Class C addresses as it displays information on supernetting (collecting multiple IP addresses together). Within the CIDR Tab, you can enter an IP address and the number of supernet bits you wish to use, and the Calculator will display the number of possible supernets and their address allocation range. The route address and supernet masks used are displayed in dotted decimal and dotted hexadecimal notation.

The license of this software is Freeware, you can free download and free use this ip utility software.