IP Subnet Calculator

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When displaying subnets the new bits in the network part of the netmask are marked in a different color The is the inverse netmask as used for access control lists in Cisco routers. The lower portion further expands the subnet and breaks down CIDR information as well as providing owner information or data, if available, for the particular address and subnet range.

Having a small, local utility that is both simple and robust is a far better option — it's reliable and it's portable! So, you can do it that way—or simply plug in your IP address or IP range into our calculator and make it much easier on yourself.

IP Subnet Calculator - No specific skills are needed for using this calculator, it is available for all users. ABOUT SUBNET CALCULATOR The subnet calculator lets you enter a subnet range CIDR and see IP address information about that range.

IP Calculator takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range. By giving a second netmask, you can design subnets and supernets. It is also intended to be a teaching tool and presents the subnetting results as easy-to-understand binary values. Inverse netmasks are recognized. If you omit the netmask ipcalc uses the default netmask for the class of your network. Look at the space between the bits of the addresses: The bits before it are the network part of the address, the bits after it are the host part. You can see two simple facts: In a network address all host bits are zero, in a broadcast address they are all set. The class of your network is determined by its first bits. If your network is a private internet according to RFC 1918 this is remarked. When displaying subnets the new bits in the network part of the netmask are marked in a different color The is the inverse netmask as used for access control lists in Cisco routers. Do you want to split your network into subnets? Enter the address and netmask of your original network and play with the second netmask until the result matches your needs. You can have all this fun at your shell prompt. Thanks for your ideas and help to make this tool more useful: Bartosz Fenski Denis A. Hainsworth Foxfair Hu Frank Quotschalla Hermann J. Beckers Igor Zozulya Kevin Ivory Lars Mueller Lutz Pressler Oliver Seufer Scott Davis Steve Kent Sven Anderson Torgen Foertsch Tim Brown Address Host or Network Netmask i. Have a look in the archives for the new version 0.

TCP/IP Subnet Masking made easy
That number jumps to over 300,000,000,000,000,000,000,000,000,000,000,000,000 in IPv6. No glad skills are needed for using this calculator, it is available for all users. This happens every time. If your network is a private internet according to RFC 1918 this is remarked. That's why i gave a thumb down to your review. I understand that I can file my consent at anytime. Inverse netmasks are recognized. It make you download a small. You can have all this fun at your shell prompt. Pros: 10 characters minimum Count: 0 of 1,000 characters 4.