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-130 | Extraordinary Jeopardy Procedures for 818 NPA in California |
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| PL-129 | Extraordinary Jeopardy Procedures for 650 NPA in California |
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| PL-128 | NANP-Phased three-way split of 619 (California) Numbering Plan Area (NPA) with 858 & 935 NPAs |
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| PL-127 | NANP-Overlay of 847 (Illinois) Numbering Plan Area (NPA) with 224 NPA |
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| PL-126 | Extension of Permissive Dialing Period for Utah 801 and 435 NPA Relief; Reference PL-NANP-065 |
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| PL-125 | NANP-Overlay of 310 (California) Numbering Plan Area (NPA) with 424 NPA |
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| PL-124 | Extraordinary Jeopardy Procedures for 914 Numbering Plan Area (NPA) in New York |
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| PL-123 | NANP-Split of 504 (Louisiana) Numbering Plan Area (NPA) |
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| PL-122 | Extraordinary Jeopardy Procedures for 508, 617, 781 and 978 Numbering Plan Area (NPA) in Massachusetts |
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| PL-121 | NANP Split of 813 (Florida) Numbering Plan Area (NPA); This supersedes PL-NANP-109 that advised of an 813 NPA Overlay. |
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| PL-120 | NANP Split of 612 (Minnesota) Numbering Plan Area (NPA) |
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| PL-119 | Notification of Assignment of 882 NPA for Inbound Foreign Billed Calls to Toll-Free Numbers |
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| PL-118 | NANP-Split of 702 (Nevada) Numbering Plan Area (NPA) |
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| PL-117 | NANP-Overlay of 303 (Colorado) Numbering Plan Area (NPA) with 720 NPA |
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| PL-116 | NANP-Concentrated Overlay of 305 Numbering Plan Areas (NPA) in Florida |
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| PL-115 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 909 NPA (California) |
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| PL-114 | BellSouth Operation Support Systems Update and the Alabama and North Carolina NPA Splits |
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| PL-113 | NPA 876 Conversion Extension for Jamaican NPA Relief |
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| PL-112 | NANP-Split of 919 (North Carolina) Numbering Plan Area (NPA) |
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| PL-111 | NANP-Split of 805 (California) Numbering Plan Area (NPA) |
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| PL-110 | NANP-Split of 205 (Alabama) Numbering Plan Area (NPA) |
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| PL-109 | NANP-Overlay of 813 (Florida) Numbering Plan Area (NPA) |
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| PL-108 | NPA Test Number Change for the New 530 Numbering Plan Area (NPA) in California |
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| PL-105 | NANP-Split of 704 (North Carolina) Numbering Plan Area (NPA) |
| Year | Number | Subject |
|---|---|---|
| PL-107 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 813 NPA (Florida) |
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| PL-106 | Transfer of NANP Administration Responsibilities to Lockheed Martin IMS |
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| PL-104 | Additional Changes to the Split of 508 & 617 NPAs (Massachusetts) |
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| PL-103 | NANP-Introduction of New 784 (St. Vincent and the Grenadines) Numbering Plan Area (NPA) |
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| PL-102 | NANP-Overlay of 770 and 404 Numbering Plan Areas (NPA) in Georgia |
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| PL-101 | Revisions to the Split of 614 (Ohio) Numbering Plan Area (NPA) |
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| PL-100 | NANP-Split of 910 (North Carolina) Numbering Plan Area (NPA) - Revised |
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| PL-099 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 512 NPA (Texas) |
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| PL-098 | NANP-Split of 209 (California) Numbering Plan Area (NPA) |
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| PL-097 | Extraordinary NPA-Specific Conservation Procedures for 516 NPA (New York) |
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| PL-096 | Declaration of Jeopardy Situation in NPA 847 (Illinois) |
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| PL-095 | Extension in the Permissive Dialing Period for the 508 and 617 NPA Relief Plans (Massachusetts) |
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| PL-094 | Changes to Extraordinary NPA-Specific Conservation Procedures for 215 and 717 NPAs (Pennsylvania) |
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| PL-093 | Changes to Extraordinary NPA-Specific Jeopardy Conservation Procedures for the 972 NPA (Texas) |
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| PL-092 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 281 and 713 Numbering Plan Areas in Houston, Texas |
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| PL-091 | NANP-Split of 412 (Pennsylvania) Numbering Plan Area (NPA) |
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| PL-090 | Extension of Permissive Dialing Period for NPA 876 (Jamaica) |
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| PL-089 | Automatic Number Identification Digits (ANI II) for Pay Phone Compensation |
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| PL-088 | NANP – Split of 614 (Ohio) Numbering Plan Area (NPA) |
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| PL-087 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for North Carolina and South Carolina Numbering Plan Areas |
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| PL-086 | NANP-Split of 803 (South Carolina) Numbering Plan Area (NPA) |
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| PL-085 | NANP-Split of 405 (Oklahoma) Numbering Plan Area (NPA) |
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| PL-084 | NANP-Split of 403 (Alberta) Numbering Plan Area (NPA) |
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| PL-083 | Declaration of Jeopardy Situation in NPA 813 (Florida) |
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| PL-082 | Extraordinary NPA-Specific Conservation Procedures for 610 NPA (Pennsylvania) |
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| PL-081 | NANP-Split of 615 (Tennessee) Numbering Plan Area (NPA) |
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| PL-080 | Changes in Test Numbers and Effective Dates for California NPA Splits |
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| PL-079 | NANP-Split of 601 (Mississippi) Numbering Plan Area (NPA) |
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| PL-078 | Declaration of Jeopardy Situation in NPA 913 (Kansas) |
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| PL-077 | NANP-Split of 816 (Missouri) Numbering Plan Area (NPA) |
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| PL-076 | NANP-Split of 514 (Quebec) Numbering Plan Area (NPA) |
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| PL-075 | Declaration of Jeopardy Situation in NPA 303 (Colorado) |
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| PL-074 | NANP-Assignment of 877 NPA for Toll-Free Services |
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| PL-073 | Declaration of Jeopardy Situation in NPA 713 (Texas) |
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| PL-072 | NANP-Split of 916 (California) Numbering Plan Area (NPA) |
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| PL-071 | Changes to the 415 and 714 NPA (California) Relief Plans |
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| PL-070 | Extraordinary NPA-Specific Conservation Procedures for 908 NPA (New Jersey) |
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| PL-069 | NANP-Split of 617 (Massachusetts) Numbering Plan Area (NPA) |
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| PL-068 | NANP-Split of 508 (Massachusetts) Numbering Plan Area (NPA) |
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| PL-067 | Extraordinary NPA-Specific Conservation Procedures for 210 NPA (Texas) |
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| PL-066 | NANP-Split of 313 (Michigan) Numbering Plan Area (NPA) |
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| PL-065 | NANP- Split of 801 (Utah) Numbering Plan Area (NPA) |
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| PL-064 | Change in Test Number for Split of 817 NPA (Texas) |
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| PL-063 | NANP- Split of 408 (California) Numbering Plan Area (NPA) |
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| PL-062 | NANP- Split of 213 (California) Numbering Plan Area (NPA) |
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| PL-061 | NANP- Split of 510 (California) Numbering Plan Area (NPA) |
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| PL-060 | Announcement of Jeopardy Procedures for 510 and 916 NPAs (California) |
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| PL-059 | NANP-Split of 904 (Florida) Numbering Plan Area (NPA) |
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| PL-058 | Extraordinary NPA-Specific Conservation Procedures for 972 NPA (Texas) |
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| PL-057 | Extraordinary NPA-Specific Conservation Procedures for 770 NPA (Georgia) |
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| PL-056 | NANP-Introduction of New 340 (U.S. Virgin Islands) Numbering Plan Area (NPA) |
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| PL-055 | Extraordinary NPA-Specific Conservation Procedures for 215 and 412 NPAs (Pennsylvania) |
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| PL-054 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for Seven California Number Plan Areas (NPAs) |
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| PL-053 | NANP-Split of 913 (Kansas) Numbering Plan Area (NPA) |
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| PL-052 | Important Notice of Delay in Implementation of NPA Relief for the 412 NPA (Pennsylvania) |
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| PL-051 | Declaration of Jeopardy Situation in NPA 816 (Missouri) |
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| PL-050 | Declaration of Jeopardy Situation in NPA 972 (Texas) |
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| PL-049 | Declaration of Jeopardy Situation in NPA 614 (Ohio) |
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| PL-048 | Declaration of Jeopardy Situation in NPA 770 (Georgia) |
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| PL-047 | Extraordinary NPA-Specific Conservation Procedures for 508 and 617 NPAs (Massachusetts) |
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| PL-046 | Declaration of Jeopardy Situation in NPA 403 (Alberta) |
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| PL-045 | NANP-Split of 216 (Ohio) Numbering Plan Area (NPA) |
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| PL-044 | NANP-Split of 714 (California) Numbering Plan Area (NPA) |
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| PL-043 | Assignment of Service Codes 311 and 711 |
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| PL-042 | Extraordinary NPA-Specific Conservation Procedures for 501 NPA (Arkansas) |
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| PL-041 | Extraordinary NPA-Specific Conservation Procedures for 717 NPA (Pennsylvania) |
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| PL-040 | Reissuance of Notification of NANP-Split of 414 (Wisconsin) Numbering Plan Area (NPA) to Correct End Permissive Date |
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| PL-039 | NANP-Declaration of Jeopardy Situation in NPA 215 (Pennsylvania) |
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| PL-038 | North American Numbering Plan Area Codes - 1997 Update |
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| PL-037 | NANP-Split of 908 (New Jersey) Numbering Plan Area (NPA) |
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| PL-036 | NANP-Split of 201 (New Jersey) Numbering Plan Area (NPA) |
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| PL-035 | NANP-Split of 210 (Texas) Numbering Plan Area (NPA) |
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| PL-034 | NANP-Split of 817 (Texas) Numbering Plan Area (NPA) |
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| PL-033 | NANP-Split of 501 (Arkansas) Numbering Plan Area (NPA) |
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| PL-032 | NANP-Split of 414 (Wisconsin) Numbering Plan Area (NPA) |
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| PL-031 | Declaration of Jeopardy Situation in NPA 405 (Oklahoma) |