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 |
|---|---|---|---|---|---|---|
| 2021-12-29 | 413-468 | 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHERST | MA |
| 2021-12-29 | 413-469 | 8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHRSTFKLN | MA |
| 2021-07-30 | 413-428 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHERST | MA |
| 2021-04-17 | 413-399 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHERST | MA |
| 2020-04-06 | 413-379 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHERST | MA |
| 2014-06-17 | 413-406 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHERST | MA |
| 2014-03-06 | 413-404 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHERST | MA |
| 2013-06-12 | 413-801 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHERST | MA |
| 2008-10-10 | 413-336 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHRSTFKLN | MA |
| 2004-12-02 | 413-301 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | SPRINGFLD | MA |
| 2003-11-10 | 413-230 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHERST | MA |
| 2002-12-19 | 413-212 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PITTSFIELD | MA |
| 2002-07-22 | 413-388 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CHICOPEE | MA |
| 2001-04-19 | 413-297 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | SPRINGFLD | MA |
| — | 413-250 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | SPRINGFLD | MA |
| — | 413-329 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PITTSFIELD | MA |
| — | 413-356 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CHICOPEE | MA |
| — | 413-446 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PITTSFIELD | MA |
| — | 413-522 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | GREENFIELD | MA |
| — | 413-561 | 1XXX3XXX5XXX6XXX8XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HOLYOKE | MA |
| — | 413-563 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | SPRINGFLD | MA |
| — | 413-626 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | SPRINGFLD | MA |
| — | 413-627 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | SPRINGFLD | MA |
| — | 413-695 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | AMHERST | MA |
| — | 413-824 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | GREENFIELD | MA |
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.