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 |
|---|---|---|---|---|---|---|
| 2024-02-09 | 563-215 | 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CLINTON | IA |
| 2022-02-22 | 563-352 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CLARENCE | IA |
| 2022-02-22 | 563-353 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SO HARMONY | IA |
| 2021-12-03 | 563-338 | 8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOPKINTON | IA |
| 2021-12-03 | 563-509 | 9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LIME SPG | IA |
| 2021-07-22 | 563-330 | 0XXX3XXX7XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MONONA | IA |
| 2021-07-20 | 563-314 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DORCHESTER | IA |
| 2021-07-20 | 563-317 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SOSPGGROVE | IA |
| 2021-07-19 | 563-310 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HAWKEYE | IA |
| 2021-07-19 | 563-312 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LOSTNATION | IA |
| 2019-12-06 | 563-298 | 3XXX7XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GUTTENBERG | IA |
| 2016-09-20 | 563-207 | 0–9 XXXall 10 · 7 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DUBUQUE | IA |
| 2011-11-23 | 563-258 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DUBUQUE | IA |
| 2008-09-08 | 563-639 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DAVENPORT | IA |
| 2001-06-18 | 563-613 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LOW MOOR | IA |
| 2001-06-05 | 563-607 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MUSCATINE | IA |
| 2001-06-05 | 563-663 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DUBUQUE | IA |
| — | 563-508 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DAVENPORT | IA |
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.