NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

3 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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 970
UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 1
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 970-453 not yet reported which blocks → QWEST CORPORATION 9636 BRECKENRDG CO
— 970-454 6XXX7XXX which blocks → QWEST CORPORATION 9636 EATON CO
— 970-461 not yet reported which blocks → QWEST CORPORATION 9636 LOVELAND CO
— 970-463 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 JULESBURG CO
— 970-464 2XXX3XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9636 PALISADE CO
— 970-468 not yet reported which blocks → QWEST CORPORATION 9636 DILLON CO
— 970-470 4XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 VAIL CO
— 970-471 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 VAIL CO
— 970-472 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-474 5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 JULESBURG CO
— 970-476 not yet reported which blocks → QWEST CORPORATION 9636 VAIL CO
— 970-477 none assigned yet which blocks → QWEST CORPORATION 9636 VAIL CO
— 970-479 not yet reported which blocks → QWEST CORPORATION 9636 VAIL CO
— 970-480 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F ESTES PARK CO
— 970-481 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FT COLLINS CO
— 970-482 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-483 not yet reported which blocks → WIGGINS TEL. ASSN. 2209 WIGGINS CO
— 970-484 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-485 6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DILLON CO
— 970-486 0XXX1XXX2XXX3XXX5XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 DILLON CO
— 970-487 not yet reported which blocks → CENTURYTEL OF EAGLE, INC. DBA CENTURYLINK 2185 COLLBRAN CO
— 970-490 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-491 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-493 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-494 none assigned yet which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-495 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-496 not yet reported which blocks → QWEST CORPORATION 9636 DILLON CO
— 970-498 not yet reported which blocks → QWEST CORPORATION 9636 FT COLLINS CO
— 970-506 not yet reported which blocks → QWEST CORPORATION 9636 GREELEY CO
— 970-509 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 FRASER CO
— 970-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CO
— 970-513 not yet reported which blocks → QWEST CORPORATION 9636 DILLON CO
— 970-515 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
— 970-518 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
— 970-519 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 TELLURIDE CO
— 970-520 not yet reported which blocks → N.E. COLORADO CELLULAR, INC. 6874 STERLING CO
— 970-521 not yet reported which blocks → QWEST CORPORATION 9636 STERLING CO
— 970-522 not yet reported which blocks → QWEST CORPORATION 9636 STERLING CO
— 970-523 not yet reported which blocks → QWEST CORPORATION 9636 GRAND JCT CO
— 970-524 not yet reported which blocks → CENTURYTEL OF EAGLE, INC. DBA CENTURYLINK 2185 GYPSUM CO
— 970-526 6XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9636 STERLING CO
— 970-527 1XXX8XXX9XXX · 3 holders which blocks → DELTA COUNTY TELE-COMM, INC. 2184 PAONIA CO
— 970-529 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9636 CORTEZ CO
— 970-531 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 FRASER CO
— 970-532 not yet reported which blocks → QWEST CORPORATION 9636 BERTHOUD CO
— 970-533 2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → QWEST CORPORATION 9636 MANCOS CO
— 970-534 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
— 970-535 2XXX3XXX5XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 MEAD CO
— 970-537 not yet reported which blocks → UNION TELEPHONE COMPANY 013B KREMMLING CO
— 970-539 6XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 GREELEY CO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.