Assignment of NPA 577 for Non-Geographic Services
Primary documents
| Letter | Published | Subject |
|---|---|---|
| PL-466 | 2014-03-28 | Assignment of NPA 577 for Non-Geographic Services |
| PL-464 | 2014-02-28 | Assignment of NPA 577 for Non-Geographic Services |
| PL-458 | 2013-10-11 | Assignment of NPA 577 for Non-Geographic Services |
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.