When searching for residential contacts, it is helpful to know the National Numbering Plan : : Typically start with the digit 6 . Mobile Numbers : Generally begin with 8 or 9 . IP Telephony : Usually starts with 3 .

: Most users shifted to searching for information via mobile devices.

: The era of the physical residential directory effectively ended in 2017 , when it was announced that the 2018 edition would be the final print run. Why the Residential Directory "Disappeared"

: Originally, residential and business listings were combined, but by 1970 , they were split into two separate books.