Basically all people are going to find that thread that how to check your number Ownership just from sending SMS, when i was finding that topic but i didn't Find any Solid Thread That is Why i Decide to Post that Thread in My Blog,
From PTA The Second Phase for Sim Re-Verification is Going on, and All Mobile Phone Customers are Hurrying to Sim Re-verify Their Sims Through Bio-metric Verification System. Now it is Decide from PTA that Any Sim That will Remain un-verified After 13th April 2015 It will Get Blocked, And Again Customer Can't Verify their Sim. Now its Time to Verify All sims That are Related to your CNIC.
For Checking your Sim's Ownership Methods are Below,
From Ufone Send Blank Sms to 696 to Get your Sim's Ownership,
From Mobilink The SMS Rate Charges may apply, So Send it at your Own Risk for checking your Number Ownership send your name to 300 and you will get Ownership,
Only For Warid Customer Send your name to 129, and you will receive Sms Ownership Detail.
and Zong Customers Visit This Site to Get Number Ownership Detail
Site is Here and
Other site ,