The first telephone area codes were issued for the USA and Canada in 1947. The first telephone area codes were issued in the UK in 1958.
You can get a state-by-state listing of telephone area codes in India at the link below.
No, telephone area codes are discrete data.
In general, the area code for your Comcast telephone service will be the area code for the city or town where the service is provided. If you live in an area with overlay area codes (two or more area codes serving the same cities and towns), you may be able to choose among them.
A Texas telephone call will have a prefix with it's area code in it. Texas has many area codes. Below are some of the area codes.210214254281325361409430432469512682713806817830832903915936940956972979
California has the distinction of having two dozen telephone area codes. This is due to its large population and diverse geographic regions, which necessitate multiple area codes to manage telephone numbering. As a result, California has the highest number of area codes in the United States.
Area codes 484, 610 and 835 are Commonwealth of Pennsylvania telephone area codes which serve the Southeast region of the state including the cities of Allentown, Bethlehem, and Reading, along with much of the Delaware Valley(excluding Philadelphia).
Area codes are discrete data.
The telephone country code for Brazil is +55, and the area code for entire state of Roraima, is 95, or +55 95 in international format.
Before area codes, telephone areas in North America were defined by reference to the nearest large city.
If you look at maps, you will not find area codes. Area codes can be found on area code locator websites. Another place to find area codes is in the telephone directory.
Francisco Beltrão, Paraná, Brazil, is in Brazilian area code 46, which is +55 46 from outside Brazil.