NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2018-04-20 | 670-284 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2013-01-31 | 670-783 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2010-07-02 | 670-785 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2008-10-10 | 670-848 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2008-10-10 | 670-858 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2007-02-26 | 670-789 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2005-01-25 | 670-285 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2005-01-13 | 670-878 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2004-08-25 | 670-838 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2004-08-24 | 670-898 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2003-03-10 | 670-868 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| 2002-07-30 | 670-888 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| — | 670-286 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| — | 670-287 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
| — | 670-788 | not yet reported which blocks → | PTI PACIFICA INC. | 387C | SAIPAN | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.