NumberResearchRecent prefix assignments
374 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 10/01/2026
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
Oct 2026
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 507-657 | none assigned yet which blocks → | ACE TEL. ASSN. - MN | 1345 | OSTRANDER | MN |
| — | 507-658 | not yet reported which blocks → | WOODSTOCK TEL. CO. | 1510 | RUTHTON | MN |
| — | 507-661 | none assigned yet which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WATERVILLE | MN |
| — | 507-662 | 2XXX3XXX4XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | LAKEFIELD | MN |
| — | 507-663 | not yet reported which blocks → | QWEST CORPORATION | 9631 | NORTHFIELD | MN |
| — | 507-664 | 1XXX6XXX · 2 holders which blocks → | QWEST CORPORATION | 9631 | NORTHFIELD | MN |
| — | 507-665 | 1XXX7XXX · 2 holders which blocks → | QWEST CORPORATION | 9631 | LE SUEUR | MN |
| — | 507-667 | 4XXX7XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | LONSDALE | MN |
| — | 507-669 | 1XXX3XXX5XXX7XXX8XXX · 3 holders which blocks → | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | HARDWICK | MN |
| — | 507-673 | 1XXX3XXX4XXX5XXX6XXX which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | LUVERNE | MN |
| — | 507-674 | 5XXX7XXX8XXX · 3 holders which blocks → | CONSOLIDATED COMMUNICATIONS OF MINNESOTA CO - MN | 1427 | AMBOY | MN |
| — | 507-677 | 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | CHANDLER | MN |
| — | 507-678 | 3XXX4XXX5XXX · 2 holders which blocks → | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | DELFT | MN |
| — | 507-680 | 0XXX1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - MN | 184D | IVANHOE | MN |
| — | 507-683 | 4XXX5XXX6XXX · 2 holders which blocks → | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | BIGELOW | MN |
| — | 507-684 | not yet reported which blocks → | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | ELLENDALE | MN |
| — | 507-685 | 7XXX which blocks → | CANNON VALLEY TELECOM, INC. | 1440 | MORRISTOWN | MN |
| — | 507-688 | 4XXX6XXX · 2 holders which blocks → | ONVOY, LLC - MN | 184D | ELLENDALE | MN |
| — | 507-689 | 5XXX6XXX · 2 holders which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | ROLLINGSTN | MN |
| — | 507-692 | not yet reported which blocks → | CLEMENTS TEL. CO. | 1372 | CLEMENTS | MN |
| — | 507-693 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - MN | 184D | MILLVILLE | MN |
| — | 507-694 | not yet reported which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | IVANHOE | MN |
| — | 507-695 | not yet reported which blocks → | DUNNELL TEL. CO. | 1381 | DUNNELL | MN |
| — | 507-697 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → | QWEST CORPORATION | 9631 | MORTON | MN |
| — | 507-698 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | ONVOY, LLC - MN | 184D | WATERVILLE | MN |
| — | 507-700 | not yet reported which blocks → | MN | |||
| — | 507-702 | 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | ONVOY, LLC - MN | 184D | GAYLORD | MN |
| — | 507-711 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | MN |
| — | 507-723 | not yet reported which blocks → | WESTERN TEL. CO. | 1502 | SPRINGFLD | MN |
| — | 507-724 | 0XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → | QWEST CORPORATION | 9631 | CALEDONIA | MN |
| — | 507-725 | not yet reported which blocks → | ACE LINK TELECOMMUNICATIONS, INC. | 6169 | CALEDONIA | MN |
| — | 507-726 | 5XXX8XXX · 2 holders which blocks → | CONSOLIDATED COMMUNICATIONS OF MINNESOTA CO - MN | 1427 | LK CRYSTAL | MN |
| — | 507-727 | not yet reported which blocks → | CLARITY TELECOM, LLC DBA BLUEPEAK | 4768 | WORTHINGTN | MN |
| — | 507-728 | 2XXX3XXX which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | WELCOME | MN |
| — | 507-732 | not yet reported which blocks → | ZUMBROTA TEL. CO. | 1515 | ZUMBROTA | MN |
| — | 507-733 | not yet reported which blocks → | MABEL COOP. TEL. CO. - IA | 1424 | NOBURR OAK | MN |
| — | 507-734 | 7XXX which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | BALATON | MN |
| — | 507-736 | 1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN | 1123 | ODIN | MN |
| — | 507-743 | not yet reported which blocks → | ACE TEL. ASSN. - MN | 1345 | CANTON | MN |
| — | 507-744 | not yet reported which blocks → | LONSDALE TEL. CO., INC. | 1422 | LONSDALE | MN |
| — | 507-746 | not yet reported which blocks → | WOODSTOCK TEL. CO. | 1510 | GARVIN | MN |
| — | 507-747 | not yet reported which blocks → | MINNESOTA VALLEY TEL. CO., INC. | 1439 | LUCAN | MN |
| — | 507-752 | 3XXX4XXX8XXX · 3 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | LAMBERTON | MN |
| — | 507-753 | 6XXX which blocks → | CENTURYLINK OF MINNESOTA, INC. | 1456 | ZUMBRO FLS | MN |
| — | 507-754 | not yet reported which blocks → | HOME TEL. CO. | 1408 | GRAND MDW | MN |
| — | 507-755 | not yet reported which blocks → | ALLIANCE COMMUNICATIONS COOPERATIVE, INC. - SD | 280D | E VLY SPG | MN |
| — | 507-757 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | ONVOY, LLC - MN | 184D | CANNON FLS | MN |
| — | 507-760 | none assigned yet which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SLAYTON | MN |
| — | 507-762 | not yet reported which blocks → | REDWOOD COUNTY TEL. CO. | 1472 | VESTA | MN |
| — | 507-763 | 4XXX5XXX6XXX · 2 holders which blocks → | FRONTIER COMMUNICATIONS OF MINNESOTA, INC. | 1367 | CURRIE | MN |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 10/01/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.