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 330
OHIO BELL TEL CO 198
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 116
NEW CINGULAR WIRELESS PCS, LLC - IL 64
T-MOBILE USA, INC. 62
BRIGHTSPEED OF NORTHWEST OHIO, INC. 60
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
— 330-721 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 MEDINA OH
— 330-722 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 MEDINA OH
— 330-723 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 MEDINA OH
— 330-724 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-725 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 MEDINA OH
— 330-726 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-727 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 YOUNGSTOWN OH
— 330-728 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 YOUNGSTOWN OH
— 330-729 5XXX8XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-730 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-731 0XXX1XXX2XXX3XXX5XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MANCHESTR OH
— 330-732 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANTUA OH
— 330-733 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-734 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-735 0XXX6XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 DELLROY OH
— 330-736 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH
— 330-737 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MASSILLON OH
— 330-738 0XXX1XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MECHANCSTN OH
— 330-739 0XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 HARLEM SPG OH
— 330-740 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-742 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-743 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-744 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-745 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-746 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-747 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-750 7XXX which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-751 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 ORRVILLE OH
— 330-753 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-755 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-756 1XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BEACH CITY OH
— 330-757 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-758 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-759 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-760 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-761 0XXX8XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-762 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-763 none assigned yet which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MILLERSBG OH
— 330-764 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 MEDINA OH
— 330-767 1XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BREWSTER OH
— 330-769 6XXX7XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 SEVILLE OH
— 330-770 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 YOUNGSTOWN OH
— 330-772 1XXX7XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 HARTFORD OH
— 330-773 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-774 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
— 330-775 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MASSILLON OH
— 330-776 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GREENSBURG OH
— 330-777 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AKRON OH
— 330-779 1XXX7XXX8XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-780 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 AKRON 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.