Calafornia
You would need an area code to use reverse phone lookup as without an area code you would not know what State, Province or even country the phone number generated from.
All phone providers use the 301 area code. 301 indicates the area code for the phone number. In the US, area code 301 is used in the western part of the state of Maryland, including Washington, DC.
dial 1 and the area code
The Mexican state of Tabasco has 11 different area codes.
The point of a phone number is that it uniquely identifies the phone you wish to call. When you dial an area code, you are asking the system to connect you to that area code. So, you would dial the area code of the location you are calling TO.
The area code for the entire state of Maine (both landlines and cell phones) is +1 207.
The area code 443 is assigned to the state of Maryland. It serves as an overlay for the 410 area code and covers regions including Baltimore and surrounding areas. This area code was introduced in 1997 to accommodate the growing demand for phone numbers in the region.
That is an Illinois area code.
The 552 area code is assigned to the state of New Jersey in the United States. It is an overlay area code that covers regions served by the 609 area code. This code was introduced to accommodate the growing demand for phone numbers in the area.
Area code 909 is in southern California, including San Bernardino and Ontario.
The 259 area code is an overlay area code for the state of Indiana, specifically serving parts of the Indianapolis metropolitan area. It was introduced to accommodate the growing demand for phone numbers in the region. This area code works alongside the existing 317 area code.
A phone number for the USA is 1 and then the area code of whatever state you are calling to, then the 7 digits that follow.