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 |
|---|---|---|---|---|---|---|
| — | 414-447 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-448 | 6XXX7XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | MILWAUKZN3 | WI |
| — | 414-449 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-453 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 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 |
| — | 414-460 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | 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 |
| — | 414-467 | 0XXX which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN1 | WI |
| — | 414-469 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 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 |
| — | 414-477 | 3XXX4XXX5XXX6XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | MILWAUKZN1 | WI |
| — | 414-479 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-480 | not yet reported which blocks → | SPOK, INC. | 6630 | MILWAUKZN5 | 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 |
| — | 414-485 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF WISCONSIN, LLC - WI | 227F | 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 |
| — | 414-491 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-501 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MILWAUKZN5 | WI |
| — | 414-507 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-510 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-511 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WI |
| — | 414-515 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MILWAUKZN1 | WI |
| — | 414-516 | not yet reported which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MILWAUKZN1 | WI |
| — | 414-517 | 0XXX2XXX which blocks → | METROPCS, INC. | 5562 | MILWAUKZN1 | WI |
| — | 414-519 | 5XXX6XXX9XXX which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-520 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 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 |
| — | 414-530 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-531 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | 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 |
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.