Having to remember an extra area code in Nogales AZ can be the difference between life and death in certain circumstances. Its mind boggling how such a seemingly insignificant jumble of numbers can prove so vexatious. The area code in Nogales Arizona is a hallmark example of a good idea executed horribly, horribly awry.
The area code in Nogales AZ was erroneously conceived with the forethought that the electromechanical channels of the telephone could tell whether you were dialing a 10 digit number with an area code in Nogales Arizona, or a mere 7 digit number. Back then, there were no letters on the 1 or 0 digits of the dial, so those digits were never utilized as a part of the first two digits of any telephone number. Astutely, every single area code in Nogales AZ was given either a 1 or a 0 as the center digit with the goal that they were able to be recognized from a phone prefix which could never have a 1 or 0 in the center position. This implied that a machine could see 212 and know an area code in Nogales Arizona had been dialed.
What most people have no idea of today, is that Alexander Graham Bell chose that more meager states which required just a specific area code in Nogales AZ might be allotted a 0 in the center and greater states that required a different area code in Nogales Arizona might utilize a 1 as a part of the center. The purpose behind this choice has never been fully expounded up, however, has been theorized that the 1 might encourage machines track movement to various toll focuses while a 0 might send all movement to a solitary toll focus. In this way, you realized that 212 (otherwise referred to as New York) was a multiple area code in Nogales AZ state while 202 (The District of Columbia) was a solitary Area code in Nogales Arizona.
An area code in Nogales AZ was allotted based upon including up the sum of the digits (considering a 0 a 10) and doling out the least numbers to the most amazing urban areas. Subsequently, 212 leveled with 5 and was the most minimal plausible number and headed off to New York City, the de facto capital city. 213 paralleled 6 and headed off to Los Angeles and 312 moreover leveled with 6 and were appointed to Chicago. 202 met 4 and was the most reduced plausible number for a lone Area code in Nogales Arizona and this headed off to Washington DC.