TULSA, Oklahoma -- Oklahomans in the 918 area code exchange could start getting 539 area code numbers starting Friday.
The Oklahoma Corporation Commission says it's not certain that will happen on Friday, it just depends on if they run out of 918 area code numbers.
If you are getting a new telephone number, you can ask to be given a 918 area code and you'll get it if there are still numbers available.
Current estimates show Green Country will run out of 918 area code numbers next year, but that limit could always come earlier.
The Oklahoma Corporation Commission issued the following notes:
• It is not certain that 539 will be assigned to a number on April 1. What is known is that the first prefix that will be assigned the 539 area code is 664. A "prefix" is comprised of the 3 digits immediately following the area code.
• How quickly the 539 area code is assigned to other prefixes will depend on how many 918 numbers are left for a particular prefix. Many new phone numbers in the region will continue to be assigned 918 as the supply allows.
• Customers will always be able to request a 918 number, and will be assigned one if it is available.
• The "overlay" of 539 onto the region served by 918 will not change long distance boundaries. For example, a call from Broken Arrow to Tulsa will remain a local call, even if the call is from a 539 number to a 918 number.
• The North American Numbering Plan Administration (NANPA) currently estimates the supply of 918 numbers will run out ("exhaust") in the fourth quarter of 2012. This estimate is subject to change.