NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026
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 |
|---|---|---|---|---|---|---|
| — | 928-447 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| — | 928-484 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | PAGE | AZ |
| — | 928-492 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | PAYSON | AZ |
| — | 928-493 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | PRESCOTT | AZ |
| — | 928-496 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | SEDONA | AZ |
| — | 928-504 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | SOMERTON | AZ |
| — | 928-543 | 1XXX6XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - AZ | 630E | WICKENBURG | AZ |
| — | 928-563 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| — | 928-569 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| — | 928-585 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | WINSLOW | AZ |
| — | 928-597 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | YUMA | AZ |
| — | 928-693 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - AZ | 630E | PAGE | AZ |
| — | 928-832 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| — | 928-833 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| — | 928-888 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → | ONVOY, LLC - AZ | 630E | GRANDCNYON | AZ |
| — | 928-962 | not yet reported which blocks → | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.