IP Mask Calculator

* "Simply Elegant" -SMC
* "Nicelly done, that's exactly what I need. I use it for my CCNA preparation" -Jason Ming

This IP Subnet Mask Calculator is designed for Network Engineer that need to calculate or verify the ip mask, hosts range, broadcast ip, etc.
Handles truly like a calculator with keys and display in a single view, all the values updates in real time as you increase or decrease the mask bit.
AN EASY, SIMPLE, MUST HAVE APP FOR IT PROFESSIONALS !!

Features:
- Easy edit with custom keyboard
- Entry validation with sound feedback
- Class A,B,C,Reserved
- Display realtime IP mask, first last host, network IP and broadcast IP
- Subnetting and Supernetting
- Decimal, Binary and Hexadecimal
- Results are formatted and ready to be emailed for report or printing 
BONUS:
- Fetch IP address registration information from IANA.org database using whois protocol.