Publications

Planning Letters 2021

These Informational Letters (IL) or Planning Letters (PL) may be downloaded from this web site. These files require the use of the Adobe Acrobat Reader.

Number Subject Date
PL-576 NPA 480, 602 and 623 Boundary Elimination Overlay (Arizona) December 30, 2021
PL-575 NPA 468 to Overlay NPA 819/873 (western Quebec) December 2, 2021
PL-574 NPA 343/613 (eastern Ontario) – amending PL-571 November 17, 2021
PL-573 NPA 354 to Overlay NPA 450/579 (area surrounding Montréal, Québec, Canada) November 15, 2021
PL-572 NPA 263 to Overlay NPA 438/514 (Montreal, Quebec, Canada)  November 10, 2021
PL-571 NPA 753 to Overlay NPA 343/613 (eastern Ontario) November 10, 2021
PL-570 NPA 683 to Overlay NPA 249/705 (central and northeastern Ontario) November 10, 2021
PL-569 NPA 472 to Overlay NPA 910 (North Carolina) – supersedes PL-565 November 9, 2021
PL-568 NPA 975 to Overlay NPA 816 (Missouri) October 28, 2021
PL-567 NPA 557 to Overlay NPA 314 (Missouri) October 28, 2021
PL-566 Assigning from NPA 527 for Non-Geographic Services September 29, 2021
PL-565 NPA 472 to Overlay NPA 910 (North Carolina) September 1, 2021
PL-564 Assignment of NPA 527 for Non-Geographic Services August 12, 2021
PL-563 NPA 983 to Overlay NPA 303/720 (Colorado) July 29, 2021
PL-562 NPA 464 to Overlay NPA 708 (Illinois) July 16, 2021
PL-561 NPA 742 to Overlay NPA 289/365/905 (Southern Ontario, Canada) – supersedes PL-550 June 7, 2021
PL-560 NPA 368 to Overlay NPAs 403/587/780/825 (Alberta, Canada) Deferred  – supersedes PL-531 May 25, 2021
PL-559 NPA 943 to Overlay NPA 404/470/678/770 (Georgia) supersedes PL-555 May 10, 2021
PL-558 Assigning from NPA 526 for Non-Geographic Services January 28, 2021
PL-557 NPA 879 overlay on NPA 709 (Newfoundland & Labrador, Canada) Indefinitely Deferred – supersedes PL-503, PL-514 and PL-521. January 20, 2021
PL-556 Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Lifeline) – supersedes PL-544 January 8, 2021

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