NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
8X8, INC. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
— 269-386 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLON MI
— 269-387 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 KALAMAZOO MI
— 269-388 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 KALAMAZOO MI
— 269-389 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 KALAMAZOO MI
— 269-390 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C DOWAGIAC MI
— 269-399 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLCV - MI 543C PAW PAW MI
— 269-407 not yet reported which blocks → SPOK, INC. 6630 NILES MI
— 269-408 3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 ST JOSEPH MI
— 269-410 not yet reported which blocks → SPOK, INC. 6630 BATTLE CRK MI
— 269-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 269-413 not yet reported which blocks → SPOK, INC. 6630 KALAMAZOO MI
— 269-416 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GANGES MI
— 269-417 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 BATTLE CRK MI
— 269-419 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BATTLE CRK MI
— 269-422 0XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER MIDSTATES, INC. - MI 0681 BARODA MI
— 269-423 1XXX2XXX3XXX5XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 DECATUR MI
— 269-424 0XXX1XXX2XXX4XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 SISTER LKS MI
— 269-426 0XXX1XXX5XXX9XXX · 3 holders which blocks → FRONTIER MIDSTATES, INC. - MI 0681 SAWYER MI
— 269-427 3XXX4XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 BANGOR MI
— 269-428 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ST JOSEPH MI
— 269-429 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ST JOSEPH MI
— 269-432 0XXX1XXX5XXX6XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 COLON MI
— 269-434 0XXX1XXX3XXX4XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 GRAND JCT MI
— 269-435 0XXX1XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 CONSTANTIN MI
— 269-436 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DECATUR MI
— 269-438 1XXX6XXX · 2 holders which blocks → CLIMAX TEL. CO. 0688 CLIMAX MI
— 269-441 not yet reported which blocks → ONVOY, LLCV - MI 543C BATTLE CRK MI
— 269-445 7XXX which blocks → FRONTIER NORTH, INC. - MI 0695 CASSOPOLIS MI
— 269-449 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON HBR MI
— 269-461 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 EAU CLAIRE MI
— 269-462 4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DOWAGIAC MI
— 269-463 1XXX9XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 WATERVLIET MI
— 269-465 1XXX8XXX · 2 holders which blocks → FRONTIER MIDSTATES, INC. - MI 0681 BRIDGMAN MI
— 269-466 1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → FRONTIER MIDSTATES, INC. - MI 0681 BRIDGMAN MI
— 269-467 0XXX2XXX3XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 CENTREVL MI
— 269-468 0XXX1XXX9XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 COLOMA MI
— 269-469 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 NEWBUFFALO MI
— 269-470 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON HBR MI
— 269-471 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 BERRIENSPG MI
— 269-473 0XXX6XXX7XXX9XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 BERRIENSPG MI
— 269-476 0XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 VANDALIA MI
— 269-483 4XXX5XXX6XXX · 3 holders which blocks → FRONTIER NORTH, INC. - MI 0695 WH PIGEON MI
— 269-484 4XXX which blocks → ONVOY, LLCV - MI 543C GALESBURG MI
— 269-488 not yet reported which blocks → ONVOY, LLCV - MI 543C KALAMAZOO MI
— 269-489 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC. - MI 0695 BURR OAK MI
— 269-491 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 KALAMAZOO MI
— 269-492 2XXX4XXX5XXX8XXX which blocks → ONVOY, LLCV - MI 543C KALAMAZOO MI
— 269-496 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 MENDON MI
— 269-497 1XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C SCOTTS MI
— 269-501 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KALAMAZOO MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.