NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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 |
|---|---|---|---|---|---|---|
| 2017-10-12 | 803-680 | 0–9 XXXall 10 · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 0526 | JACKSON | SC |
| — | 803-267 | 5XXX8XXX9XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | EHRHARDT | SC |
| — | 803-368 | 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | OLAR | SC |
| — | 803-418 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SUMTER | SC |
| — | 803-435 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | MANNING | SC |
| — | 803-436 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SUMTER | SC |
| — | 803-471 | 1XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 0526 | JACKSON | SC |
| — | 803-484 | 7XXX8XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | BISHOPVL | SC |
| — | 803-485 | 0XXX1XXX5XXX9XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SUMMERTON | SC |
| — | 803-632 | 0XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | FAIRFAX | SC |
| — | 803-633 | 6XXX7XXX9XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | WINNSBORO | SC |
| — | 803-635 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | WINNSBORO | SC |
| — | 803-666 | 0XXX1XXX5XXX6XXX8XXX · 3 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SHAWAFBHTS | SC |
| — | 803-668 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SHAWAFBHTS | SC |
| — | 803-712 | 3XXX4XXX5XXX8XXX · 4 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | WINNSBORO | SC |
| — | 803-773 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SUMTER | SC |
| — | 803-775 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SUMTER | SC |
| — | 803-778 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SUMTER | SC |
| — | 803-829 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 0526 | BOWMAN | SC |
| — | 803-854 | 1XXX6XXX7XXX8XXX · 4 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 0526 | SANTEE | SC |
| — | 803-897 | 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 0526 | ELLOREE | SC |
| — | 803-934 | 4XXX which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SUMTER | SC |
| — | 803-938 | 4XXX5XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | SUMTER | SC |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.