Great tool, realy great tool!

For me the free version is perfect expept for one thing; I don’t need to see the hex-code or the bit-nr. This would make the free version more simplier and you have more reason to pay for the Pro!

Or at least give me this as an option in the free version.
or have Free, Standard (1 USD) and Pro (3 USD or what ever)

Rickard
Sweden

With regard the maximum hosts, I feel it’s a matter of preference. I like to know how many IPs a certain range gives me – including the network and broadcast. Having to subtract 2 to find the number of “usable” hosts is fine I feel. However, given the amount of call for it to display the value as “2^(32-CIDR) – 2″, I feel I should do that in the next release.

Thanks again for your comments – I appreciate it a lot!

Fantastic, simple and elegant app.

Definitely makes subnet calculations a breeze. Mind you, I still prefer to manually calculate them so that I don’t loose that skill. Having this apps allows me to check that I’ve got it right.

I was going to mention the Maximum hosts being miscalculated (includes Network and Broadcast addresses), but someone else has beaten me to it.

As for being able to enter the subnet mask in dotted-decimal instead of the shorthand method, I don’t see the point in implementing it as you can see what the d-d mask is at the same time as selecting the # of bits.

169.254.0.0/16 is considered a “link-local” address range by the Cisco CCNA v4.0 courseware – Windows PC’s (WinXP and above certainly) and possibly those running better OS’s default to an address in this range when DHCP fails.
192.0.2.0/24 is also reserved, for testing purposes and use in documentation (alongside example.com) and is classed as “Test-Net” by the same courseware.

The reason for having IP address again in the calculation section is that when you view in hexadecimal or binary mode then it makes sense to have the IP visible in this notation, but to still be able to enter it in the standard dotted decimal manner.

I have a small request:
In the lower part the first two datalines are showing
ip …
netmask …
As ‘IP’ is redundant (same as the input field right at the top) and the netmask is “only” the numerical display of the bitmask, I’d like to put in an idea:

Make the lower part (Subnet Calculation) sortable so that anyone can change the order of the rows as he whishes.

Or:

Pls hardcode ‘hostmin’ and ‘hostmax’ as the first two display lines if suggestion 1.) is too complex.

Anyway:
Many thanks for your App!

Regards
Holger