Skip to main content

Planning Letters


The Planning Letters (PL) and Informational Letters (IL) are sorted by publication date. To view or download a PL or IL, you can search by year or search by planning/informational letter number. To search by a planning letter number e.g., 623, select “Any” as the year and enter the Planning Letter number using this format “PL-XXX” e.g., PL-623. To search by an Informational Letter, select “Any” as the year and enter the Informational Letter number using this format “IL-XX-XX-XXX” or “IL-XXX-XX-XX-XXX” e.g., IL-91-05-035.

The PL page does default to “Any”

Year: 2011
Year Number Subject
PL-430

NPA 669 to Overlay NPA 408 (California)

PL-429

Updated Information - Introduction of NPA 721 (Sint Maarten)

PL-428

NPA 236 to Overlay NPA 250/604/778 (British Columbia, Canada)

PL-427

NPA Code 667 to Overlay NPA Code 410/443 (Maryland)

PL-426

NPA 437 to Overlay NPA 416/647 (Toronto, Canada)

PL-425

NPA Code 873 to Overlay NPA Code 819 (Western Quebec, Canada)

PL-424

Assignment of NPA 566 for Personal Communications Services (PCS)

PL-423

Updated Information - Introduction of NPA 721 (Sint Maarten)

PL-422

NPA 984 to Overlay NPA 919 (North Carolina)

PL-421

NPA 415, 619, 650, 707 - Relief Plans Dismissed (California)

PL-420

NPA 365 to Overlay NPA 289/905 (Southern Ontario, Canada)

PL-419

NPA 431 to Overlay NPA 204 (Manitoba, Canada)

PL-418

Introduction of NPA 721 (Sint Maarten)

Year: 2010
Year Number Subject
PL-417

NPA 274 to Overlay NPA 920 (Wisconsin)

PL-416

Assignment of NPA 544 for Personal Communications Services (PCS)

PL-415

NPA 270 (Kentucky) - 2-way Split, Creating 364 NPA - Relief Plan Cancelled

PL-414

NPA 249 to Overlay NPA 705 (Ontario, Canada)

PL-413

NPA 510 (California) - Relief Plan Dismissed

PL-412

Implementation of the NPA 855 for Toll Free Services

PL-411

Assignment of NPA 544 for Personal Communications Services (PCS)

PL-410

NPA 531 to Overlay NPA 402 (Nebraska)

PL-409

NPA 272 to Overlay NPA 570 (Pennsylvania)

PL-408

NPA 270 Split, Creating NPA 364 (Kentucky) - Start of Permissive Dialing Suspended

PL-407R1

Implementation of the NPA 855 for Toll Free Services

PL-406

Assignment of NPA 544 for Personal Communications Services (PCS)

PL-405

NPA 873 to Overlay NPA Code 819 (Western Québec, Canada)

PL-404

Introduction on NPA 721 (Sint Maarten, Netherlands Antilles

PL-403

NPA 539 to Overlay NPA 918 (Oklahoma)

PL-402

NPA 929 to Overlay NPA 718/347 (New York)

PL-401

NPA 579 to Overlay NPA 450 (Québec, Canada)

PL-400

NPA 327 to Overlay NPA 870 (Arkansas)

Year: 2009
Year Number Subject
PL-399

Assignment of NPA 533 for Personal Communications Services (PCS)

PL-398R1

NPA 249 to Overlay NPA 705 (Ontario, Canada)

PL-397

NPA 531 to Overlay NPA 402 (Nebraska)

PL-396

Introduction of NPA 721 (Sint Maarten, Netherlands, Antilles)

PL-395

NPA 579 to Overlay NPA 450 (Québec, Canada)

PL-394

Assignment of NPA 533 for Personal Communications Services (PCS)

PL-393

NPA 531 to Overlay NPA 402 (Nebraska)

PL-392

NPA 872 to Overlay NPA 312 and 773 (Illinois)

PL-391

NPA 270 Split, Creating NPA 364 (Kentucky) - Change Start of Permissive Dialing

PL-390

NPA 872 to Overlay NPA 312 and 773 (Illinois)

PL-389

NPA 938 to Overlay NPA 256 (Alabama)

PL-388

NPA 475 to Overlay NPA 203; NPA 860 10-digit dialing (Connecticut)

PL-387R1

NPA 849 to Overlay NPAs 809 and 829 (Dominican Republic)

PL-386

NPA 343 to Overlay NPA 613 (Eastern Ontario, Canada)

Year: 2008
Year Number Subject
PL-385

NPA 274 to Overlay NPA 920 (Wisconsin)

PL-384

NPA 534 to Overlay NPA 715 (Wisconsin)

PL-383

NPA 458 to Overlay NPA 541 (Oregon)

PL-382

Assignment of NPA 533 for Personal Communications Services (PCS)

PL-381

NPA 442 to Overlay NPA 760 (California)

PL-380

Reminder to update networks with the new 575 NPA for the 505 NPA Split in New Mexico

PL-379

Assignment of NPA 533 for Personal Communications Services (PCS)

PL-378

NPA 747 to Overlay NPA 818 (California)

PL-377

NPA 760 Split, Creating NPA 442 (California)

PL-376

NPA 270 Split, Creating NPA 364 (Kentucky) - Change Start of Permissive Dialing

PL-375

NPA 681 to Overlay NPA 304 (West Virginia)

PL-374

NPA 587 to Overlay NPA 403 and NPA 780 (Alberta, Canada)

PL-373R1

NPA 581 to Overlay NPA 418 (Quebec, Canada)

PL-372

Assignment of NPA 533 for Personal Communications Services (PCS)

Year: 2007
Year Number Subject
PL-371

NPA 270 Split, Creating NPA 364 (Kentucky) - Change Start of Permissive Dialing

PL-370

NPA 540 (Virginia) Order of Dismissal

PL-369

NPA 587 to Overlay NPAs 403 and 780 (Alberta, Canada)

PL-368

NPA 657 to Overlay NPA 714 (California)

PL-367

NPA 581 to Overlay NPA 418 (Quebec, Canada)

PL-366

NPA 385 to Overlay NPA 801 (Utah)

PL-365

NPA 270 Split, Creating NPA 364 (Kentucky)

PL-364

NPA 587 to Overlay NPAs 403 and 780 (Alberta, Canada)

PL-363

NPA 385 to Overlay NPA 801 (Utah)

PL-362

NPA 331 to Overlay NPA 630 (Illinois)

PL-361

Relief for British Columbia 250 Area Code and NPA 778 Boundary Change

PL-360

Louisiana 504/985 RCC and NPA Boundary Realignment

Year: 2006
Year Number Subject
PL-359

Expansion of Concentrated NPA 971 Overlay with NPA 503 (Oregon)

PL-358

NPA 505 Split, Creating NPA 575 (New Mexico)

PL-357

NPA 331 to Overlay NPA 630 (Illinois)

PL-356

NPA 762 to Overlay NPA 706 Extended Permissive (Georgia)

PL-355

NPA 613 & NPA 819 Relief Phase One (Dial Plan Change)

PL-354

NPA 779 to Overlay NPA 815 (Illinois)

PL-353

NPA 762 to Overlay NPA 706 Extended Permissive (Georgia)

PL-352

NPA 762 to Overlay NPA 706 Extended Permissive (Georgia)

PL-351

NPA 762 to Overlay NPA 706 Extended Permissive (Georgia)

PL-350

NPA 226 to Overlay NPA 519 (Southwestern Ontario, Canada)

PL-349

NPA 438 to Overlay NPA 514 (Montreal Urban Area)

PL-348

NPA 762 to Overlay NPA 706 Extended Permissive (Georgia)

Year: 2005
Year Number Subject
PL-347

NPA 424 to Overlay NPA 310 (California)

PL-346

NPA 762 to Overlay NPA 706 (Georgia)

PL-345

Change of Test Number 809/829 Overlay (Dominican Republic)

PL-344

PA 835 Implementation for 484/610 NPA Rescinded - 835 NPA Code Reclaimed

Year: 2004
Year Number Subject
PL-343

Supersedes Planning Letter 342 - NPA 226 to Overlay NPA 519 (Southwestern Ontario, Canada)

PL-342

NPA 226 to Overlay NPA 519 (Southwestern Ontario, Canada)

PL-341

NPA 438 to Overlay NPA 514 (Montreal Urban Area)

PL-340

NPA 613 & NPA 819 Relief Phase One (Dial Plan Change)

PL-339

CA 909/951 NPA Split-Reminder Planning Letter

PL-338

NPA 829 to Overlay NPA 809 (Dominican Republic)

PL-337

Utah 801-385 Split Suspended

PL-336

New York 716 NPA Split - Wireless Extended Permissive Dialing Ends

PL-335

NPA 769 to Overlay NPA 601 (Mississippi)

Year: 2003
Year Number Subject
PL-334

909 NPA; 2-way Split, Creating 951 NPA California

PL-333

NPA 438 To Overlay NPA 514 (Montréal Urban Area)

PL-332

PA 445 Implementation for 215/267 NPA Rescinded - 445 NPA Code Reclaimed

PL-331

Recovery of NPA Codes 880, 881, 882 (Paid Toll-Free Service) Scheduled for April 1, 2004