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
Aug 2026
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Jun 2026
May 2026
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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 414-546 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-550 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | WI |
| — | 414-557 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MILWAUKZN1 | WI |
| — | 414-558 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MILWAUKZN1 | WI |
| — | 414-559 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | MILWAUKZN1 | WI |
| — | 414-562 | 5XXX6XXX7XXX · 3 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-563 | 7XXX which blocks → | PAETEC ITEL, LLC | 829J | MILWAUKZN5 | 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 |
| — | 414-573 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-575 | not yet reported which blocks → | SPOK, INC. | 6630 | MILWAUKZN1 | 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 |
| — | 414-581 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-584 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MILWAUKZN1 | WI |
| — | 414-586 | 1XXX which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN4 | WI |
| — | 414-587 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-588 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-590 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MILWAUKZN1 | WI |
| — | 414-596 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MILWAUKZN1 | WI |
| — | 414-599 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-603 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | 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 |
| — | 414-610 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WI |
| — | 414-614 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-615 | not yet reported which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MILWAUKZN1 | WI |
| — | 414-616 | 1XXX3XXX7XXX · 2 holders which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-617 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | MILWAUKZN1 | WI |
| — | 414-625 | 0XXX which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | MILWAUKZN1 | WI |
| — | 414-627 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-628 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN3 | WI |
| — | 414-630 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILWAUKZN1 | WI |
| — | 414-640 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | 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 |
| — | 414-651 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-659 | none assigned yet which blocks → | UNITED STATES CELLULAR - WI | 6274 | MILWAUKZN1 | WI |
| — | 414-662 | 0–9 XXXall 10 · 4 holders which blocks → | PEERLESS NETWORK OF WISCONSIN, LLC - WI | 227F | MILWAUKZN1 | WI |
| — | 414-665 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | MILWAUKZN1 | WI |
| — | 414-669 | not yet reported which blocks → | SPOK, INC. | 6630 | 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 |
| — | 414-688 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 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.