Leaving aside the inherent sketchiness of having a "company" and prosecuting people to "life-time prison," I'm going to let you in on a little secret. If you type in "MAC address" into the little box next to the word "search" above, you'll find that this subject has been hashed and re-hashed many a time already. For instance:

• How can I find a MAC address from aremote IP ?
• MAC Address and NIC Device on Network.
• (code) MAC n' IP cheese

In the future, kindly do a minute of searching before doing a minute of posting.

perl -pe '"I lo*`+$^X$\"$]!$/"=~m%(.*)%s;$_=$1;y^`+*^e v^#$&V"+@( NO CARRIER'