KARACHI - As per the instructions of PTA, Pakistan Telecommunication Company Limited (PTCL) is shifting its fixed line numbering pan from 7 to 8 digit series. Initially, the migration from 7 series to 8 digit series would take place in Lahore and Karachi. As per details, Digit 3 will be added in all existing 7 digits numbers of Karachi and Lahore except the numbers starting from 9. Moreover, digit 9 will be added in all existing numbers starting from 9. An important point to remember is the numbers are being added to existing numbers not area codes, with the exemption of army exchanges which would remain same. For the customers awareness and facilitation, the new series plan will run parallel to old one for a period of three months w.e.f. July 01, 09 till Sep 30. The period from Oct 1 till Dec 30, will be covered by announcements, which would be made in order to facilitate subscribers and customers.