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-558 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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