CallerSmart!

Find a person by a name or phone number worldwide for free using Truecaller. Also available on Android, iPhone, Nokia Symbian and Blackberry.

Callpage.io is an online tool for websites. Shortly said, we allow your visitors to receive callback from your company in 28 seconds.

WhoMen lets you make free and unlimited calls & texting with your contacts. Share your photos or videos with unlimited number of users or record a voice memo. A global phonebook directory to search and find caller id of any number with accurate and updated data. You can search for phone numbers or by name for free.

DU Caller is multi-lingual, and with the world’s largest phone number database, you can use it wherever you are!

Sync.ME identifies unknown phone calls, warns you from annoying spam calls, and adds a caller picture to your contacts from Facebook, LinkedIn and Google+!

This application will help to determine telephone numbers, both mobile and fixed telecom operators around the world by using codes.Guide consists of two modules:- Identification “Who called?” Just enter your phone number and you will receive information by the following numbers of telephone subscriber: country, state, region, area, city, town.- The instruction ""How to call?"" It helps to find and display the plan of numbers as handy reference of codes for countries, cities and mobile operators worldwide.Please note, this application can’t tell you who's calling, but it can help to find by telling where the call is from, providing that the number of subscriber is fixed and attached geographically or to the network provider.Database is constantly updated and corrected, as it is located on a remote server.The program requires an Internet connection. The application is free. »

WhosCall is a reverse Number Search, with a global number database of over 600 million entries.

Retro Sleuth provides background information from any number that you want to search.

You can use this tool if someone calls you and you aren't familiar with the phone number, or else your caller ID doesn't provide you with the name of the caller. With WhoEasy you can lookup cell and landline phone numbers from their real time directory, and get results fast. They will return the name, address and more about who owns the phone number you are searching.

Complete phone number report. Get a phone GPS location heatmap, mobile operator, city, state, comments about any phone number.

“Call Notes Is a Cheat Sheet While You’re on the Phone.” Gizmodo

Should I answer the call? This question can come into a mind of every person who sees an unknown incoming call. Each of us had (or will have) the opportunity to face the unsolicited call, telemarketing campaign, advertisement or some kind of fraud call. How should we find out that the calling number is harmless and answering it will not cost us tens of minutes of precious time or a significant amount of money?