There are 2 ways to check how many numbers issued against your NIC.
1) go to http://www.pta.gov.pk/668/index.html
or
http://cnic.sims.pk/
and enter your NIC number. It will tell you your sim issued against your NIC.
2) Send a text message
to: 668
message/write: nic# (full 13 digit)
