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-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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