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 |
|---|---|---|---|---|---|---|
| 2023-04-14 | 564-236 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - WA | 483E | VANCOUVER | WA |
| 2023-04-07 | 564-645 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - WA | 483E | POULSBO | WA |
| 2023-01-23 | 564-238 | 0XXX2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → | ONVOY, LLC - WA | 483E | PORT ORCH | WA |
| 2023-01-23 | 564-242 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - WA | 483E | MARYSVILLE | WA |
| 2022-11-16 | 564-565 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - WA | 483E | WHATCOMCTY | WA |
| 2022-09-20 | 564-264 | 2XXX3XXX4XXX7XXX8XXX which blocks → | ONVOY, LLC - WA | 483E | CURTIS | WA |
| 2020-11-18 | 564-524 | 1XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → | ONVOY, LLC - WA | 483E | COPALIS | WA |
| 2020-10-30 | 564-464 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - WA | 483E | OLYMPIA | WA |
| 2020-10-22 | 564-544 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - WA | 483E | ABERDEEN | WA |
| 2020-10-22 | 564-546 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - WA | 483E | BELFAIR | WA |
| 2020-10-22 | 564-654 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - WA | 483E | BREMERTON | WA |
| — | 564-213 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - WA | 483E | WHATCOMCTY | WA |
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.