Searching for the owner of a phone number is known as reverse phone lookup.
Actually, there is no sure and reliable system to look up a number.
It does not work like the phone directory where everything is systematic, endorsed and complete.

Lifewire
But mobile phone numbers tend to belong to different and often competing mobile operators.
Reverse phone lookup engines have to work as gatherers and crawlers to feed their databases.
Some apps even extract information out of the contact lists of their users and feed their databases from them.

StumptheMonkey.com
Actually, most phone numbers (especially mobile) are not present in those databases.
This is why you will not always get satisfactory results.
The results you will surely get, but not always what you want.

WhitePages.com
For example, you could see a result of something like “Manhattan, Sprint”.
While to some it may be useful, it is not what people want from reverse phone lookup.
Another problem you’re free to come across with reverse phone lookup is obsolete information.

Anywho.com
The lookup service may have gathered the information of a previous owner of a number in the directory.
When you search, you miss the new owner and get the old one.
On the other hand, we have to note that some apps give a huge number of hits.
However, you may be asked to throw in something instead of the money.
The Price of Reverse Phone Number Lookup
Reverse phone lookup is both free and paid.
You should not consider the cost of reverse phone lookup to be solely in terms of money.
it’s crucial that you be aware that you pay with your privacy as well.
Most people are already signed up with their browsers on these services so they are not prompted.
Now guess why they want to service you inside your personal social web connection account?
This is how they build their database.
What can you do about it?
We know TrueCaller offers this.
But each app is different.
Whitepages
Whitepages.comis probably the most common in North America.
It offers a very simple but nice interface, with four interesting options.
First, you’re free to search for people, like by a name.
Reverse phone search comes on the second tab.
check that you click there before entering the number.
The third option is a reverse address search you enter someone’s address to the best accuracy you might.
You may not be able to search for mobile numbers on that.
Finally, the fourth option allows you to search for public numbers.
Whitepages.com has more than 200 million entries and is restricted to the United States.
you’ve got the option to also use the Android app as a Caller ID app.
AnyWho
Along with its white pages service as an online electronic phone directory,AnyWhooffers reverse lookup.
But here cell phone numbers are not available.
You get numbers only in the US.
So you are pretty much limited.
The plus is only the algorithm that allows you to search the directory in the reverse.
Tofind someone’s phone number online, search onZabasearchor a specialized directory likeTruePeopleSearch,Whitepages, andSpy Dialer.
Toblock a phone numberon iPhone, tap theiicon next to the phone number and selectBlock this Caller.
On Android, opt for number to block and tapBlock numberorReject call.
Enter*67before dialing a number tohide your phone numberfrom the recipient of the call.
Most carriers have aHide Numbersetting you’re free to enable in their app.