NumberResearchRecent prefix assignments
1 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, last 30 days — NPA 414
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 414-359 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN4 | WI |
| — | 414-362 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN4 | WI |
| — | 414-364 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN4 | WI |
| — | 414-365 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN4 | WI |
| — | 414-371 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN4 | WI |
| — | 414-372 | 0XXX6XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-374 | 1XXX2XXX3XXX5XXX6XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-378 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-379 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-380 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-382 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-383 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-384 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-385 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-386 | 0XXX2XXX3XXX6XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN3 | WI |
| — | 414-389 | 7XXX8XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-390 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-393 | 7XXX8XXX which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-397 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN1 | WI |
| — | 414-402 | not yet reported which blocks → | SPOK, INC. | 6630 | MILWAUKZN1 | WI |
| — | 414-403 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | MILWAUKZN1 | WI |
| — | 414-404 | 0–9 XXXall 10 · 2 holders which blocks → | PEERLESS NETWORK OF WISCONSIN, LLC - WI | 227F | MILWAUKZN1 | WI |
| — | 414-405 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | MILWAUKZN1 | WI |
| — | 414-406 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN1 | WI |
| — | 414-407 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MILWAUKZN1 | WI |
| — | 414-409 | 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MILWAUKZN3 | WI |
| — | 414-410 | 9XXX which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MILWAUKZN4 | WI |
| — | 414-411 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WI |
| — | 414-412 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-416 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-418 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-419 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-421 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN3 | WI |
| — | 414-422 | 3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN3 | WI |
| — | 414-423 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN3 | WI |
| — | 414-425 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN3 | WI |
| — | 414-426 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-427 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN3 | WI |
| — | 414-429 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-430 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-431 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | MILWAUKZN1 | WI |
| — | 414-433 | 2XXX3XXX7XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | MILWAUKZN3 | WI |
| — | 414-434 | 7XXX which blocks → | PAETEC ITEL, LLC | 829J | MILWAUKZN4 | WI |
| — | 414-435 | 2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | MILWAUKZN5 | WI |
| — | 414-438 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-440 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MILWAUKZN1 | WI |
| — | 414-442 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-443 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-444 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-445 | 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.