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.
Most active assignees, all time — NPA 414
New assignments by month
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 414-454 | 9XXX which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-456 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-459 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-461 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-462 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-463 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-464 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-465 | 2XXX8XXX9XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-466 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-471 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-475 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-476 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-479 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-481 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-482 | 5XXX6XXX which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-483 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-486 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-489 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-524 | 9XXX which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-525 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN3 | WI |
| — | 414-527 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-529 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN3 | WI |
| — | 414-535 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-536 | 4XXX which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-540 | 7XXX8XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN4 | WI |
| — | 414-541 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-543 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-545 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-546 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-562 | 5XXX6XXX7XXX · 3 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-566 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-570 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN5 | WI |
| — | 414-571 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN5 | WI |
| — | 414-577 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN4 | WI |
| — | 414-578 | 0XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-586 | 1XXX which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN4 | WI |
| — | 414-599 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-604 | 5XXX6XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-607 | 2XXX which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-616 | 1XXX3XXX7XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-643 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-645 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-647 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-649 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-665 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-671 | 3XXX9XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-672 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-678 | 1XXX8XXX9XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-744 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-747 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
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.