NumberResearchRecent prefix assignments
349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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
New assignments by month
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 715-575 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | STEVENS PT | WI |
| — | 715-576 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | WAUSAU | WI |
| — | 715-577 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | EAU CLAIRE | WI |
| — | 715-579 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | EAU CLAIRE | WI |
| — | 715-581 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | WAUSAU | WI |
| — | 715-582 | 7XXX which blocks → | BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC | 0924 | PESHTIGO | WI |
| — | 715-583 | 0XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → | BRIGHTSPEED OF NORTHERN WISCONSIN, LLC | 0956 | SPRINGSTED | WI |
| — | 715-584 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SHAWANO | WI |
| — | 715-585 | 5XXX9XXX · 2 holders which blocks → | BRIGHTSPEED OF NORTHERN WISCONSIN, LLC | 0956 | HAWKINS | WI |
| — | 715-586 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | OSSEO | WI |
| — | 715-587 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MARINETTE | WI |
| — | 715-588 | 5XXX8XXX · 2 holders which blocks → | FRONTIER NORTH INC. - WI | 0886 | LCDFLAMBEU | WI |
| — | 715-589 | 8XXX which blocks → | NIAGARA TEL. CO. | 0920 | AURORA | WI |
| — | 715-590 | none assigned yet which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | EAU CLAIRE | WI |
| — | 715-591 | 1XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | CENTRAL STATE TEL. CO | 0859 | MILL CREEK | WI |
| — | 715-592 | not yet reported which blocks → | AMHERST TEL. CO. | 0843 | POLONIA | WI |
| — | 715-594 | not yet reported which blocks → | HAGER TELECOM, INC. | 0889 | BAY CITY | WI |
| — | 715-595 | 3XXX5XXX · 2 holders which blocks → | BRIGHTSPEED OF NORTHERN WISCONSIN, LLC | 0956 | HOLCOMBE | WI |
| — | 715-597 | 0XXX4XXX7XXX9XXX · 2 holders which blocks → | BRIGHTSPEED OF CENTRAL WISCONSIN, LLC | 1159 | OSSEO | WI |
| — | 715-601 | 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → | ONVOY, LLC - WI | 225C | MONDOVI | WI |
| — | 715-603 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PRESCOTT | WI |
| — | 715-604 | 4XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MANISHWTRS | WI |
| — | 715-605 | 6XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BOULDERJCT | WI |
| — | 715-609 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | LADYSMITH | WI |
| — | 715-610 | 8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ANTIGO | WI |
| — | 715-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WI |
| — | 715-612 | 8XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TOMAHAWK | WI |
| — | 715-613 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | COLBY | WI |
| — | 715-614 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MINOCQUA | WI |
| — | 715-615 | 9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | STRATFORD | WI |
| — | 715-616 | 0XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WABENO | WI |
| — | 715-617 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EAGLERIVER | WI |
| — | 715-619 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | MENOMONIE | WI |
| — | 715-620 | 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX which blocks → | ONVOY, LLC - WI | 225C | EAU CLAIRE | WI |
| — | 715-623 | not yet reported which blocks → | FRONTIER NORTH INC. - WI | 0886 | ANTIGO | WI |
| — | 715-627 | 8XXX which blocks → | FRONTIER NORTH INC. - WI | 0886 | ANTIGO | WI |
| — | 715-629 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | RIVERFALLS | WI |
| — | 715-630 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | STEVENS PT | WI |
| — | 715-631 | 1XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WINTER | WI |
| — | 715-632 | 4XXX7XXX · 2 holders which blocks → | TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK | 1155 | WHEELER | WI |
| — | 715-634 | not yet reported which blocks → | TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK | 1155 | HAYWARD | WI |
| — | 715-635 | not yet reported which blocks → | BRIGHTSPEED OF WESTERN WISCONSIN, LLC | 0922 | SPOONER | WI |
| — | 715-636 | 0XXX4XXX5XXX6XXX7XXX8XXX which blocks → | QWEST CORPORATION | 9631 | MONTDU LAC | WI |
| — | 715-637 | not yet reported which blocks → | CTC TELCOM, INC. | 7998 | BARRON | WI |
| — | 715-638 | 0XXX1XXX4XXX6XXX7XXX · 4 holders which blocks → | TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK | 1155 | HAYWARD | WI |
| — | 715-639 | 0XXX1XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → | TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK | 1155 | ELMWOOD | WI |
| — | 715-640 | none assigned yet which blocks → | LAKELAND COMMUNICATIONS GROUP, LLC | 0769 | CENTURIA | WI |
| — | 715-643 | 1XXX6XXX8XXX · 3 holders which blocks → | TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK | 1155 | BOYCEVILLE | WI |
| — | 715-644 | 1XXX8XXX9XXX · 3 holders which blocks → | BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC | 0924 | STANLEY | WI |
| — | 715-646 | 0XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → | TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK | 1155 | CENTURIA | WI |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.