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 | Number | Subject |
|---|---|---|
| PL-330 | Introduction of NPA 684 (American Samoa) |
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| PL-329 | Non-Dialable Toll Points Release of NPA Codes 886 and 889 on July 1, 2003 |
| Year | Number | Subject |
|---|---|---|
| PL-328 | 505 NPA; Petition for Approval of Relief Plan Dismissed - New Mexico |
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| PL-327 | Extraordinary NPA-Specific Jeopardy Conservation Procedures |
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| PL-326 | 801 NPA; 2-way Split Creating 385, Delayed until March 2005 (Utah) |
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| PL-325 | 689 NPA Implementation Suspended (Central Florida) |
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| PL-324 | Revised Dialing Plan for the 616 and 269 NPAs (Michigan) |
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| PL-323 | 689 NPA To Overlay 407 and 321 NPAs (Central Florida) |
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| PL-322 | 915 NPA Split, Creating 432 and 325 NPAs (Texas) |
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| PL-321 | Supplemental Information NPA Overlay 954/754 NPA (Southeast Florida) |
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| PL-320 | Mandatory Dialing Postponed - 248/947 NPA Overlay (Michigan) |
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| PL-319 | 540/276 NPA Split - Extended Permissive For Additional Wireless Codes (Virginia) |
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| PL-318 | Supplemental Information NPA Overlay 954/754 NPA (Southeast Florida) |
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| PL-317 | Suspension of 614/380 NPA Overlay (Ohio) |
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| PL-316 | Suspension of 513/283 NPA Overlay (Ohio) |
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| PL-315 | NPA 438 To Overlay NPA 514 (Montral Urban Area) |
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| PL-314 | New York 212/646, 718/347 and 917 Mandatory 10D Dialing Implementation |
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| PL-313 | NPA 430 to Overlay NPA 903 (Texas) |
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| PL-312 | 505 NPA Split Suspended (New Mexico) |
| Year | Number | Subject |
|---|---|---|
| PL-311 | 561 NPA Split, Creating 772 NPA (Florida) |
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| PL-310 | Revised Dialing Plan for the 501 and 479 NPAs (Arkansas) |
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| PL-309 | Amended 219 NPA Split Creating 574 and 260 NPAs (Indiana) |
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| PL-308 | Delayed Introduction of the 385 NPA (Utah) |
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| PL-307 | 941NPA Split, Creating 239 NPA (Southwest Florida) |
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| PL-306 | 919/984 NPA Overlay Deferred (North Carolina) |
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| PL-305 | Mandatory Dialing Date Established for NPAs 847 and 224 (Illinois) |
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| PL-304 | Suspension Relief in the 816 NPA (Missouri) |
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| PL-303 | Suspension of the 314 NPA Relief (Missouri) |
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| PL-302 | Amended 501 NPA Split Creating 479 NPA (Arkansas) |
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| PL-301 | 504/985 Split - Extended Permissive Dialing for Wireless (Louisiana) |
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| PL-300 | Extended Permissive Dialing Ends for 516/631 NPAs (New York) |
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| PL-299 | Rationing in NPAs 410, 443, and 667 (Maryland) |
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| PL-298 | Suspension of 564 Overlay (Washington) |
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| PL-297 | Revison of PL-290; Creating 380 NPA (Ohio) |
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| PL-296 | 219 NPA Split; Creating 574 and 260 NPA's (Indiana) |
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| PL-295 | 501 NPA Split; Creating 479 NPA (Arkansas) |
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| PL-294 | 616 NPA Split; Creating 269 NPA (Michigan) |
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| PL-293 | Supplemental Information NPA Overlay 787/939 (Puerto Rico) |
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| PL-292 | 505 NPA Split, Creating 575 NPA (New Mexico) |
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| PL-291 | NPA 754 To Overlay NPA 954 (Southeast Florida) |
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| PL-290 | NPA 380 to Overlay NPA 614 (Ohio) |
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| PL-289 | Suspension of 205/659 NPA Relief (Alabama) |
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| PL-288 | Supplemental Information NPA SPLIT 912/478/229 Georgia |
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| PL-287 | Permissive Seven or Ten Digit Dialing 305 NPA (Keys Area) |
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| PL-286 | Mandatory Dialing Date Established for NPA 283 (Ohio) |
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| PL-285 | Correction 540/276 NPA Split (Virginia) |
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| PL-284 | New NPA 659 to Overlay NPA 205 (Alabama) |
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| PL-283 | New NPA 947 to Overlay NPA 248 (Michigan) |
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| PL-282 | 810 / 586 NPA Split (Michigan) - Wireless NXX Grandfathering |
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| Pl-281 | Rationing in NPAs 412, 724, and 878 (Pennsylvania) |
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| PL-280 | NPA 975 Overlay of NPA 816 Implementation Date Change (Missouri) |
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| PL-279 | NPA 557 Overlay of NPA 314 Implementation Date and Dialing Plan Change (Missouri) |
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| PL-278 | Correction to PL 270, 716-585 Split (New York) |
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| PL-277 | NPA 551 To Overlay NPA 201; NPA 862 To Overlay NPA 973; and NPA 848 To Overlay NPA 732 (New Jersey) |
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| PL-276 | Suspension of 512/737 NPA Relief (Texas) |
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| PL-275 | 540 NPA Split; Creating 276 NPA (Virginia) |
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| PL-274 | Correction to the Dialing Plan for NPAs 445 and 835 (Pennsylvania) |
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| PL-273 | 810 / 586 NPA Split - Wireless NXX Grandfathering (Michigan) |
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| PL-272 | NPA 513 Boundary Realignment Franklin Rate Center (Ohio) |
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| PL-271 | NPA 984 To Overlay NPA 919 (North Carolina) |
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| PL-270 | 716 NPA Split, Creating 585 NPA (New York) |
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| PL-269 | NPA 470 To Overlay NPAs 404, 678, and 770 (Georgia) |
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| PL-268 | 520 NPA Split, Creating 928 NPA (Arizona) |
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| PL-267 | Deferral of the 445 and 835 Overlay NPAs (Pennsylvania) |
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| PL-266 | NPA 667 to Overlay NPAs 410 and 443 (Maryland) |
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| PL-265 | 810 NPA Split, Creating 586 NPA (Michigan) |
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| PL-264 | New NPA 283 to Overlay NPA 513 (Ohio) |
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| PL-263 | Country Code 670 Assigned to East Timor |
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| PL-262 | New NPA 975 to Overlay NPA 816 (Missouri) |
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| PL-261 | New NPA 557 to Overlay NPA 314 (Missouri) |
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| PL-260 | DeBary Rate Center Moves from 407 NPA to 386 NPA (Florida) |
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| PL-259 | Delayed 10-Digit Dialing in NPA 787 (Puerto Rico) |
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| PL-258 | Revised Mandatory Dialing Date for NPA 704 (North Carolina) |
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| PL-257 | 804 NPA Split; Creating 434 NPA (Virginia) |
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| PL-256 | Revised Mandatory 10-Digit Dialing Date for NPA 704/980 (North Carolina) |
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| PL-255 | Update on the Introduction of NPAs 475 and 959 (Connecticut) |
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| PL-254 | 334 NPA Split, Creating 251 NPA (Alabama) |
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| PL-253 | 319 NPA Split, Creating 563 NPA (Iowa) |
| Year | Number | Subject |
|---|---|---|
| PL-252 | 904 NPA Split, Creating 386 NPA (Northeast Florida) |
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| PL-251 | Revised Permissive Dialing Period for the 517 / 989 (MI) NPA Split |
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| PL-250 | 310 NPA Splits, Creating 424 NPA (California) |
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| Pl-249 | New NPA 567 to Overlay NPA 419 (Ohio) |
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| PL-248 | 801 NPA Split Delayed (Utah) |
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| PL-247 | 901 NPA Split, Creating 731 NPA (Tennessee) |
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| PL-246 | NPA 778 To Overlay NPA 604 (Southwestern British Columbia) |
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| PL-245 | 316 Numbering Plan Area (NPA) Split, Creating 620 NPA (Kansas) |
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| PL-244 | 517 NPA Split, Creating 989 NPA (Michigan) |
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| PL-243 | NPA 289 To Overlay NPA 905 (Southern Ontario, Canada) |
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| PL-242 | 504 NPA Split, Creating 985 NPA (Louisiana) |
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| PL-241 | Correction to Assignment Procedures for the Remaining Central Office Codes in 215 and 267 NPAs, and in the 610 and 484 NPAs (Pennsylvania) |
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| PL-240 | Urgent Reminder: Mandatory Dialing for Wireless Codes in the 337 NPA (Louisiana) |
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| PL-239 | NPA 564 to Overlay NPAs 206, 253, 360, and 425 (Washington) |
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| PL-238 | Suspension of Splits of the 707 & 760 NPAs (California) |
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| PL-237 | NPA 445 to Overlay NPAs 215 and 267 (Pennsylvania) |
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| PL-236 | NPA 939 To Overlay NPA 787 (Puerto Rico) |
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| PL-235 | New Test Number for NPA 478 (Georgia) |
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| PL-234 | NPA 774 To Overlay NPA 508; |
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| PL-233 | NPA 737 to Overlay NPA 512 (Texas) |
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| PL-232 | Revised Mandatory Dialing Date for the 914/845 Split (New York) |
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| PL-231 | 801 NPA Split, Creating 385 NPA (Utah) |