Sometimes we receive calls and wonder, "who’s this number registered to?" Well, anyone can save time trying to identify an unknown caller with a phone number lookup app. A phone lookup app allows users to conduct a free phone number search of unknown numbers on their call logs. There are a host of these lookout apps which are downloadable to your smartphone. These apps are highly beneficial to people with critical security concerns. They can help you take proper calls without missing them by identifying and differentiating them from spam calls.

That said, some of the best phone number identifier apps have multiple features. Besides detecting suspicious phone numbers, apps like Truecaller and Caller ID equally function as digital address books. They’ve proven to be more productive methods for storing and obtaining phone numbers than conventional phone books. These apps have billions of contacts, crowd-sourced from everyone who uses them, making it easy to look up numbers and contacts. You can even set up automatic backups of your contacts and call list. So, if your phone ever goes missing, you can always retrieve your contacts. They can also help you block spam calls and messages. Some of these lookup apps are equally capable of record phone calls manually or automatically. You can record before you start a call or while you're already at it.

These days, it’s easier to get background information on an unknown caller through their phone number. With an active Internet connection, you'll get the names of unknown callers when your phone rings. You can also lookup a phone number’s location and name of the caller by merely entering the unknown number into an app and hitting the search button. Unwanted calls should no longer be a source of annoyance or security concern with a phone number lookup service on your device.