: In 2004, Congress passed an amendment to the Communications Act of 1934 to prevent a national mobile phone book.
: Published in 1878 in New Haven, CT, it was a single cardboard sheet with 50 names but no numbers, as calls were connected via operators. cell phone directory
: Modern directories focus less on finding people and more on identifying potential scammers or telemarketers. How to reverse search a number for free | Kurt the CyberGuy : In 2004, Congress passed an amendment to