The first phone number to have been invented was called the ‘At&t Telephone Number’ or ATNUM in 1928.
It was a little-known telephone company that supplied the first home telephone number.
They sold them as ‘At &t’ and ‘At the Telephone’.
The first call on these was made on August 21, 1928.
The ATNUM was used to make all calls on the telephone network, as well as to answer phone calls made by the company itself.
It’s not until the year 1940 that AT&T starts to introduce more advanced dialing equipment, such as the ‘Dot D’ and the ‘Gig’ dialing machines.
It also introduced a new type of dialing machine called the “AT-8” which used an eight-digit telephone number as the keypad.
In 1949 the AT-8 became the ‘World’s first phone’, the first call to be made using the ATNUM.
The number was first called the ATTRONOMY, and it is still the only phone number that is still in use today.