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 |
|---|---|---|---|---|---|---|
| 2021-05-10 | 563-842 | 2XXX5XXX6XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | HOLY CROSS | IA |
| 2020-07-21 | 563-348 | 0–9 XXXall 10 · 5 holders which blocks → | FRACTEL, LLC | 965H | DUBUQUE | IA |
| 2020-07-21 | 563-465 | 0XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → | FRACTEL, LLC | 965H | FARLEY | IA |
| 2020-07-21 | 563-758 | 1XXX6XXX8XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | WORTHINGTN | IA |
| 2020-07-21 | 563-877 | 1XXX7XXX8XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | EARLVILLE | IA |
| 2019-12-23 | 563-500 | 0–9 XXXall 10 · 3 holders which blocks → | FRACTEL, LLC | 965H | DUBUQUE | IA |
| 2019-12-23 | 563-766 | 1XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | COLESBURG | IA |
| 2019-12-23 | 563-900 | 0–9 XXXall 10 · 6 holders which blocks → | FRACTEL, LLC | 965H | DAVENPORT | IA |
| 2019-12-19 | 563-356 | 0XXX1XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → | FRACTEL, LLC | 965H | CHESTER | IA |
| 2019-12-17 | 563-400 | 0–9 XXXall 10 · 4 holders which blocks → | FRACTEL, LLC | 965H | CRESCO | IA |
| 2019-12-17 | 563-600 | 0–9 XXXall 10 · 2 holders which blocks → | FRACTEL, LLC | 965H | LANSING | 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.