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 |
|---|---|---|---|---|---|---|
| 2023-08-03 | 878-301 | 0XXX1XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | SMOCK | PA |
| 2023-08-03 | 878-329 | 0XXX8XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | SMITHFIELD | PA |
| 2023-08-03 | 878-489 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | HARRISONCY | PA |
| 2023-08-03 | 878-522 | 0XXX2XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | YOUNGWOOD | PA |
| 2023-08-03 | 878-587 | 0XXX1XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | ENONVALLEY | PA |
| 2023-08-01 | 878-707 | 0XXX1XXX7XXX · 3 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | MARION CTR | PA |
| 2023-08-01 | 878-744 | 0XXX4XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | MCLELANDTN | PA |
| 2023-08-01 | 878-780 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | CLYMER | PA |
| 2023-08-01 | 878-808 | 8XXX9XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | FAIRCHANCE | PA |
| 2023-08-01 | 878-840 | 0XXX1XXX2XXX8XXX · 4 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | NEW SALEM | PA |
| 2023-08-01 | 878-868 | 0XXX6XXX8XXX · 3 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | NEWFLORNCE | PA |
| 2023-08-01 | 878-878 | 1XXX7XXX8XXX · 3 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | NEWBEDFORD | PA |
| 2023-08-01 | 878-988 | 0XXX8XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | PT MARION | PA |
| 2021-04-22 | 878-255 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | ALIQUIPPA | PA |
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.