NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2024-12-11 | 531-313 | 0XXX1XXX2XXX3XXX5XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HASTINGS | NE |
| 2023-10-23 | 531-348 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | COLUMBUS | NE |
| 2022-11-16 | 531-304 | 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PENDER | NE |
| 2022-09-23 | 531-290 | 9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PILGER | NE |
| 2022-09-23 | 531-296 | 0XXX2XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CEDAR BLF | NE |
| 2022-09-23 | 531-297 | 8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WAKEFIELD | NE |
| 2022-09-23 | 531-303 | 3XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | POLK | NE |
| 2022-09-23 | 531-312 | 0XXX1XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TAMORA | NE |
| 2022-09-23 | 531-338 | 0XXX2XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DAVID CITY | NE |
| 2022-09-23 | 531-441 | 0XXX1XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MEAD | NE |
| 2022-08-04 | 531-288 | 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MADISON | NE |
| 2021-11-22 | 531-282 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BEATRICE | NE |
| 2021-04-28 | 531-265 | 0–9 XXXall 10 · 7 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SOSIOUX CY | NE |
| 2021-03-12 | 531-260 | 0XXX2XXX3XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | NEHAWKA | NE |
| 2021-03-12 | 531-261 | 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WEEPINGWTR | NE |
| 2021-03-10 | 531-258 | 2XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SO GREGORY | NE |
| 2020-10-15 | 531-266 | 0XXX3XXX4XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | RUSKIN | NE |
| 2020-06-04 | 531-246 | 0–9 XXXall 10 · 7 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SUPERIOR | NE |
| 2020-06-03 | 531-245 | 0XXX2XXX3XXX4XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HARVARD | NE |
| 2020-05-21 | 531-243 | 4XXX5XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BRUNING | NE |
| 2019-06-10 | 531-232 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | OMAHA | NE |
| 2017-08-10 | 531-459 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | UTICA | NE |
| — | 531-217 | 0–9 XXXall 10 · 9 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PLATTSMTH | NE |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.