NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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, all time — NPA 937
OHIO BELL TEL CO 159
NEW CINGULAR WIRELESS PCS, LLC - IL 73
T-MOBILE USA, INC. 64
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 61
BRIGHTSPEED OF NORTHWEST OHIO, INC. 55
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
— 937-674 none assigned yet which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
— 937-675 0XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 JAMESTOWN OH
— 937-676 0XXX which blocks → WINDSTREAM OHIO, LLC 0665 PLEASANTHL OH
— 937-678 2XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WMANCHESTR OH
— 937-679 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWCARLISL OH
— 937-680 0XXX1XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GREENVILLE OH
— 937-685 0XXX1XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MARTINSVL OH
— 937-686 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 HUNTSVILLE OH
— 937-687 5XXX6XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 NEWLEBANON OH
— 937-689 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-692 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 ARCANUM OH
— 937-693 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 BOTKINS OH
— 937-694 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-695 2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 WINCHESTER OH
— 937-696 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 FARMERSVL OH
— 937-698 2XXX which blocks → FRONTIER NORTH, INC. - OH 0615 WESTMILTON OH
— 937-700 not yet reported which blocks → OH
— 937-704 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 FRANKLIN OH
— 937-708 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 XENIA OH
— 937-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 937-725 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WILMINGTON OH
— 937-726 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 SIDNEY OH
— 937-727 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 SPRINGFLD OH
— 937-740 not yet reported which blocks → OH
— 937-741 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F DAYTON OH
— 937-743 not yet reported which blocks → OHIO BELL TEL CO 9321 FRANKLIN OH
— 937-746 not yet reported which blocks → OHIO BELL TEL CO 9321 FRANKLIN OH
— 937-747 1XXX4XXX6XXX7XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 NO LEWISBG OH
— 937-748 7XXX which blocks → OHIO BELL TEL CO 9321 FRANKLIN OH
— 937-750 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAYTON OH
— 937-751 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C DAYTON OH
— 937-754 5XXX7XXX8XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 FAIRBORN OH
— 937-760 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAYTON OH
— 937-763 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HILLSBORO OH
— 937-764 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → OHIO BELL TEL CO 9321 BELFAST OH
— 937-765 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWCARLISL OH
— 937-766 0XXX1XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 CEDARVILLE OH
— 937-767 3XXX4XXX5XXX which blocks → OHIO BELL TEL CO 9321 YLSPGCLFTN OH
— 937-768 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 XENIA OH
— 937-769 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 YLSPGCLFTN OH
— 937-772 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K URBANA OH
— 937-773 not yet reported which blocks → OHIO BELL TEL CO 9321 PIQUA OH
— 937-775 not yet reported which blocks → OHIO BELL TEL CO 9321 FAIRBORN OH
— 937-776 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-777 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FAIRBORN OH
— 937-778 not yet reported which blocks → OHIO BELL TEL CO 9321 PIQUA OH
— 937-780 0XXX1XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 LEESBURG OH
— 937-781 5XXX6XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-783 6XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BLANCHESTR OH
— 937-787 0XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 GRATIS OH

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.