South Dakota is Officially using 1 South Dakota Area Code. In Which None Of Them Are Overlay Codes. South Dakota originally has one area code 605 Which Covers The Entire State, when the numbering system was established in 1947. The most recently added was 605 in 1947 as an overlap of 843 And Today Area Code 605 Is the Most Populated Areas.
South Dakota Area Code:
Area Code 605 Covers The Entire State
Changes & History Of Area Code
In 01/01/1947 – Area code 605 was put into service.
What Is Area Code?
Area code is a three-digit code in which the US and other countries are divided. It is Also a local telephone dialing code where They Call each other With These Codes.
Why are area codes added?
When The Current Area Codes Expires Or Increase in the use of cellular phones, modems, and Internet access It Creates Problems. So That why Area Codes Are Added And each area code has a potential capacity of about 8 million unique phone numbers
Once The new Area Codes Rae assigned there is usually a 6 Months Period To Move. At that time Customers Are Encouraged To Use The Code But Seven Digit Dialling is Allowed. After 6 Months customers are required to use the new telephone no.