It all started here...

Last Updated: 10 Dec 2005
...and the world noticed!

What is it and why would you want it?

An oldie, but a goodie.  Still in use after all these years.

The Subnet Assistant a quick-look tool for use in planning subnet schemes within a TCP/IP network. The program has enjoyed global exposure, is used by technical trainers, network consultants, technicians, and administrators throughout the world! You'll find look-alikes with varying functionality, but it all started here. The program is also useful for extracting a base subnet address from a known IP address and mask and documenting small networks.

Way back in 1994, when the program was first developed, the Internet Protocol was IP Version 4 (IPv4). IP version 6 is now being deployed to address the non-scalable addressing space problems of IPv4 (there were precious few network numbers left!). The TCP/IP Subnet Assistant considers only IPv4 subnetting.

The tool is written in Microsoft® Visual Basic™ 3.0 and began as an academic exercise. Version 2.01 has cleaned up much (not all) of the hack code in the initial release; still, it is not bug-free. I believe I have covered most of the "gotchas".

Where can you get it?

WIPAV201.ZIP may be downloaded from this web site by clicking here...or...back there. It debuted on CompuServe in 1994. Though doubtful, a copy may still be available in AOL forums or from the WUGNET® website.

With Windows® XP, you don't even need Phil Katz' PKZip or WinZip®.  Phil's legacy is part of the XP Windows Explorer and the Subnet Assistant compressed archive is so old it can be opened using virtually any version of ZIP decompressor.

Over the years, users of the product have asked my permission to post the ZIP file on various sites.

I have approved requests from users to have it placed (by them) on other BBS's, FTP, and web servers and I'm told it has been found at one-or-two FTP sites (though I've only seen one.) In August '95, it was available from The Microsoft Network's ASP Shareware Library, though I wouldn't count on finding it on MSN.

Note that, to date, I am not affiliated with any FTP site. I have no control over site policy, file or server availability, or file content.

What are the system requirements?

Disk Space:

The installed software requires approximately 1.1 MB of disk space when considering the necessary DLL and VBX files. Should your system already have COMMDLG.DLL, VBRUN300.DLL, CMDIALOG.VBX, and GRID.VBX installed, the product will require only 0.5 MB of disk space.

Recommended OS:

As software goes, this is a now ancient 16-bit program. If your PC is rather long in the tooth, be happy!  There is a better than good chance that the application work 100%!!

Actually, the core program still works on virtually all Microsoft® Windows® desktop operating systems (v3.x, '95, '98, NT 3.51, NT 4.x, ME, 2000, and XP). That's really amazing and Microsoft® developers should be applauded for such long-range backward compatibility (even if it is just this one, solitary accident of fate...and they'll kill it if they ever find out).  You can applaud me for keeping it simple. Print functions (they weren't worth a damn anyway) worked best with Windows 3.x versions. The program has NOT been tested on a PC having less than 4 MB of memory, though it may be able to operate on systems with less memory. Can you the reader even conceptualize a PC with less than 4 MB RAM?  If you can, remember to clean your trifocals because you're as old I am.

The program installs and core functions perform well (actually tested) on Windows® 3.x, '95, '98, NT (3.51 and 4.x.), ME, 2000, and XP Pro. Printing doesn't work correctly for all OS versions or printers.

Is it shareware?

All versions through v2.01 really are free. Even though I'm not charging you for it, you must respect the copyright and content. Expect any future versions to be shareware with a nominal charge. Oh, all right. Future versions my eye! I'm caught like a rat in a trap. There haven't been any updates in 10 years. 

Since it is free, it is also "as-is". Source code is not supplied and will not be supplied. There is nothing proprietary in terms of the binary math used for IP network calculations and other subnet tools are available on the net that do offer their source if you are so inclined.