How reverse phone lookup works?
If you get a lot of marketing calls or just want to know who called you, reverse phone lookup can help. You provide the phone number of who called into a website or directory page and it can often identify who called you and whether it is a legitimate company or telemarketer.
To understand how a reverse phone lookup works, first it is useful to know how a landline number is made up. A typical phone number is 10 digits long and comprised of what is called the ‘3-3-4 scheme’.
- The first three digits are the area code and are regulated by the FCC.
- The second three digits are the carrier prefix. This used to be the nearest telephone switch to where the line was located but thanks to number portability (the ability to take your number with you) and digitization of networks, this is no longer true.
- The final four digits is the number of the actual line connecting the property.
So when identifying a phone number, the first three digits narrows down the city, the second three the neighborhood or area and the final four, the line itself.