It used to be that the white pages would only carry land-line phone numbers.
But now that mobile phones comprise a significant percentage of all phone numbers in use today, it is absurd to think that a white pages directory cannot exist that does not contain mobile phone numbers.
I'm not even referring to a specialized mobile phone number white pages.
I'm referring to the need to have mobile phone numbers seamlessly integrated into a universal white pages directory.
In other words, if you want to look up a phone number to see who it belongs to, you should not have to know whether it is a land-line or a mobile phone number.
It should be completely transparent to you.
Especially now in this day and age in which more and more people are relying exclusively on mobile phone technology and are opting out of maintaining a home phone number altogether.
Also in recent years, both the land-line and the mobile phone companies have implemented technology that allows you to transfer your phone number between a land-line and a mobile phone and across multiple phone providers, whereas just a few short years ago, blocks of phone numbers used to be "owned" by specific carriers.
Unfortunately most free public white pages directories become outdated very quickly because people are constantly adding new phone numbers, canceling phone numbers, or transferring phone numbers on a daily basis.
You can forget about paper white pages now.
But even most fee online white pages directories contain outdated or incomplete data.