There are other White Page Directory that are able to do reverse lookups on a phone number, but you have to understand that most if not all of them will not work on a number that is controlled by a cellular telecommunication company.
Some of the tools that are ineffective with cell lines are:
1. White Page PhoneBooks - These types of online phonebooks work great for home phone numbers and business numbers, but fall flat when it comes to trying to trace cell numbers.
2. 411 services - Your typical "information" or "411" services are more or less ineffective when it comes to doing a reverse number search on a cellular number. They are however very effective similar to a phonebook when the number you are looking for is registered to a residential address.
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3. Free Lookup services - Even though you will see a ton of advertising for such services, you will find that most of if not all of these types of services will force you to jump through a bunch of hoops and still not produce results.
So, what is the best resource to use when trying to trace a cell line? Really, there is only one type of resource that is proficient in producing information for these types of numbers and that is a reverse cell directory. Basically, these tools were set up to be a database of sorts that is able to match a number up with the owner of the line. Not only that, but you are also able to ascertain things like the persons address and other more comprehensive identifiable information.