If you really want to understand Network and IP addressing or plan on going after Cisco certs, you need to understand IP address octets, binary and decimal conversions.
The output displays the full IP Address, Binary and Decimal Conversions. If the original IP address resolved to a web page the corresponding decimal web address will go to the same page (all dependent on reverse DNS).
This calculator can also be used as an IPv4 Octet - Binary - Decimal teaching tool. The graphical-type display breaks the IP address into four 8-bit segments and displays each octet with the IP portion, bit (1-32) power of 2, Decimal value of bit, octet value binary equivalent, bit status (on/off) and the decimal equivalent of activated bits.
If you get any use out of the calculator, feel free to link to the page.
Thanks. Your feedback is appreciated (including bugs).
http://www.countryipblocks.net/ipv4_calc.php