Medical Group Management Association of Alabama, is a professional association providing information, networking and development for the medical group practice administrators in the state of Alabama.
The 331 area code is used for Naperville as well as its neighbor Aurora. As a fairly recent area code, it was implemented as an overlay to the 630 area code in 2007.Currently, the 331 area code is mainly preserved for small suburbs of western Chicago, including a few neighborhoods in the Cook and Dupage Counties.he Naperville area code is fairly wealthy with a median family income of $130,000. Furthermore, only 2.5% of the population in the 331 area code lives below the poverty line.
The area code went into service on April 27, 1997, as part of a three-way split of area code 206.The period from April 27, 1997, through November 15, 1997, was considered a transition period for this new area code. Use of the 425 area code became mandatory on Sunday, November 16, 1997.he song Operator by Danish eurodance artist Miss Papaya begins with an automated message notifying the caller that area code 206 has been changed to 425.