NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2011-01-20 | 952-300 | 0–9 XXXall 10 · 7 holders which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-322 | 0XXX7XXX9XXX · 3 holders which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-423 | 0XXX8XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-431 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-432 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-435 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-460 | 0XXX1XXX2XXX3XXX5XXX7XXX9XXX · 3 holders which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-463 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-469 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-492 | 1XXX9XXX which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-873 | 1XXX7XXX8XXX9XXX · 3 holders which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-891 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-892 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-898 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-953 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-985 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
| — | 952-997 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | TWINCITIES | MN |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.