IPcalc - the IP address calculator
Network professionals often configure IP addresses for various equipment. While the individual calculations are fairly simple - mostly bit masks - its easy to make mistakes. The consequences of mistakes can be disastrous; machines wont connect with others, or worse, could isolate a whole section of the net (as a misconfigured router might do).
Even when calculating the IDs and masks correctly, its tedious.
To the rescue! IPcalc now calculates all those ugly little numbers - quickly and accurately.
Ok - enough marketing hype. Just what does IPcalc do?
- converts decimal IP addresses to hex
- displays bit usage - which bits are network, host, or subnet bits
- Class-based masks and IDs
- subnet masks and IDs
- CIDR masks and IDs
- Subnets - display the address range for each subnet
- Given an IP address, displays the masks and IDs for networks, subnets, and the host.
- identifies invalid host addresses for a particular subnet (where the host bits are all zeros or ones)
|Download version 1.02 (14k) released 31Mar 2002|
Boardwatch Magazine http://www.ispworld.com
(now owned by ISP World magazine)
Many of the ISP Tech Talk columns deal with routers and networking
issues. Several especially useful columns are:
ISP Tech Talk column: "Your Own Address Space"
@Internet column: "How Hard is CIDR"
3Com - "Understanding IP Addressing: Everything You Ever Wanted to Know"
Sangoma Technologies - TCP/IP and IPX Routing Tutorial
When you register, you'll receive a registration code which will disable the nag screens. You will also receive all future versions of IPcalc for free. (registration is for lifetime)
|IPcalc registration fee:||$10 (US dollars)|
|payment methods:||PalmGear or Check (via snailmail)|
|my "store" at eSellerate|
PalmGear - use your
credit card on their secure web server and simply buy IPcalc.
Go to their main web page at http://www.palmgear.com or to jump directly to the IPcalc purchase page click the above "buy it" button, and click the "Add To Cart" button on PalmGear's IPcalc page.
While you're there, check out some of the other great software, hardware, and accessories!
eSellerate - I set up a store at eSellerate; through this store I can take credit cards. (I don't get your credit card info; they only tell me about the purchases.)
Snailmail - If you want to register by mail, you can send a check or money order to:
1409 Great Plain Avenue
Needham, MA 02492
Please send your email address too, so I can send you a confirmation of receipt and the registration code. (if you don't have an email address, please send a snail-mail address so I can send it to you.)
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Send email to me at: email@example.com
Copyright © 1998, 2002 Alan Jay Weiner