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 |
|---|---|---|---|---|---|---|
| 2021-10-25 | 878-336 | 0–9 XXXall 10 · 7 holders which blocks → | FRACTEL, LLC | 965H | PTTSBGZON6 | PA |
| 2021-10-25 | 878-465 | 0–9 XXXall 10 · 5 holders which blocks → | FRACTEL, LLC | 965H | WEXFORD | PA |
| 2021-09-08 | 878-529 | 0XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | BROWNSVL | PA |
| 2021-08-18 | 878-356 | 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | FRACTEL, LLC | 965H | WESTNEWTON | PA |
| 2021-07-22 | 878-345 | 1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → | FRACTEL, LLC | 965H | PTGSBNZN20 | PA |
| 2020-05-27 | 878-348 | 0–9 XXXall 10 · 3 holders which blocks → | FRACTEL, LLC | 965H | BEAVER FLS | PA |
| 2020-05-27 | 878-377 | 0–9 XXXall 10 · 6 holders which blocks → | FRACTEL, LLC | 965H | SHARPSVL | PA |
| 2020-05-27 | 878-677 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | FRACTEL, LLC | 965H | NEWWLMNGTN | PA |
| 2020-05-27 | 878-688 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | FRACTEL, LLC | 965H | HOMER CITY | PA |
| 2019-01-28 | 878-787 | 0–9 XXXall 10 · 3 holders which blocks → | FRACTEL, LLC | 965H | PTTSBGZON1 | PA |
| — | 878-500 | 0XXX5XXX which blocks → | FRACTEL, LLC | 965H | FORD CITY | 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.