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 |
|---|---|---|---|---|---|---|
| — | 507-239 | 1XXX which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | WALDORF | MN |
| — | 507-375 | not yet reported which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | ST JAMES | MN |
| — | 507-465 | 4XXX6XXX · 2 holders which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | NEW RICHLD | MN |
| — | 507-523 | none assigned yet which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | LEWISTON | MN |
| — | 507-534 | none assigned yet which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | PLAINVIEW | MN |
| — | 507-545 | none assigned yet which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | EYOTA | MN |
| — | 507-689 | 5XXX6XXX · 2 holders which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | ROLLINGSTN | MN |
| — | 507-753 | 6XXX which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | ZUMBRO FLS | MN |
| — | 507-796 | 2XXX3XXX8XXX · 2 holders which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | ALTURA | MN |
| — | 507-798 | 8XXX which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | MILLVILLE | MN |
| — | 507-876 | none assigned yet which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | ELGIN | MN |
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.