NPA 564 to Overlay NPA 206 (Washington)
Primary documents
| Letter | Published | Subject |
|---|---|---|
| PL-620 | 2023-08-03 | NPA 564 to Overlay NPA 206 (Washington) |
| PL-239 | 2000-07-27 | NPA 564 to Overlay NPAs 206, 253, 360, and 425 (Washington) |
All documents are official NANPA planning letters (Tier A sources). This page consolidates every letter we have on record for this event; it is updated automatically when new letters are detected, with sensitive changes held for editorial review first.