NANPA Planning Letter (PL) Number 417 - Wisconsin - NPA 274 to Overlay NPA 920

Due to changes in the 920 NPA's projected exhaust date, on 11/15/10, the Public Service Commission of Wisconsin postponed the previously approved 920-274 NPA overlay. The new 274 NPA will serve the same geographic locations currently served by the 920 area code, which generally covers the northeastern portion of Wisconsin (including Appleton, Beaver Dam, Berlin, Fond du Lac, Fort Atkinson, Green Bay, Manitowoc, Oshkosh, Ripon, Sheboygan, Sturgeon Bay and Watertown).

PL 417 communicates the new timeline for implementation as recapped below:

• 05/04/13 -- Permissive 10-Digit Dialing Starts
• 08/22/13 -- Earliest Date to Order Central Office Codes for New NPA
• 01/25/14 -- Permissive Dialing Ends / Mandatory 10-Digit Dialing Begins
• 02/22/14 -- Earliest Date for New NPA Central Office Code Activation / Effective Date for New NPA

Effective 1/25/14 (mandatory 10-digit dialing), the dialing plan for 920 and 274 NPAs will be as follows:

• Local, EAS and ECC Calls Terminating in Home NPA (HNPA) or Foreign NPA (FNPA) … 10-Digits* (NPA-NXX-XXXX)
• Toll Calls Terminating in HNPA or FNPA … 1+ 10-Digits (1+ NPA-NXX-XXXX)
• Operator Services (Credit Card, Collect, Third Party) Calls Terminating in HNPA or FNPA … 0+ 10-Digits (0+ NPA-NXX-XXXX)

*1+10 digit permissible at service provider discretion

While 10-digit dialing is encouraged during the permissive period, subscribers may use either seven- or 10-digit calling in the overlay area during this time. And, it is always good practice for carriers to prepare their switches for 10-digits well in advance of the mandatory dialing conversion date. Additionally, international and domestic carriers should ensure the new 274 NPA has been activated network-wide prior to 2/22/14. (Test numbers for routing verification to the new NPA will be in effect 11/18/13 – 3/20/14 and are: 274-274-1274 for LATA 350 and 274-222-8378 for LATA 356.)

For additional information, visit www.nanpa.com.