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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 330-836 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-837 not yet reported which blocks → OHIO BELL TEL CO 9321 MASSILLON OH
— 330-838 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NO CANTON OH
— 330-839 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 RAVENNA OH
— 330-841 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-842 5XXX6XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 KENT OH
— 330-843 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ELIVERPOOL OH
— 330-844 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MASSILLON OH
— 330-845 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOOSTER OH
— 330-847 4XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-848 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-849 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-850 1XXX2XXX3XXX5XXX7XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ROOTSTOWN OH
— 330-851 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SEBRING OH
— 330-852 5XXX6XXX which blocks → FRONTIER NORTH, INC. - OH 0615 SUGARCREEK OH
— 330-853 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LISBON OH
— 330-854 8XXX which blocks → OHIO BELL TEL CO 9321 CANALFULTN OH
— 330-855 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 MARSHALLVL OH
— 330-856 0XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-857 7XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 KIDRON OH
— 330-859 0XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MINERAL CY OH
— 330-860 0XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-861 2XXX3XXX4XXX6XXX8XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-862 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 PARIS OH
— 330-863 3XXX4XXX5XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MALVERN OH
— 330-864 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-865 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-866 0XXX6XXX7XXX8XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 MAGNOLWSBG OH
— 330-867 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-868 8XXX which blocks → FRONTIER NORTH, INC. - OH 0615 MINERVA OH
— 330-869 1XXX7XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-871 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 LOUISVILLE OH
— 330-872 2XXX4XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 NEWTON FLS OH
— 330-873 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-874 6XXX7XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BOLIVAR OH
— 330-875 not yet reported which blocks → OHIO BELL TEL CO 9321 LOUISVILLE OH
— 330-876 8XXX9XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 KINSMAN OH
— 330-877 not yet reported which blocks → OHIO BELL TEL CO 9321 HARTVILLE OH
— 330-878 2XXX3XXX4XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 STRASBURG OH
— 330-879 0XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 NAVARRE OH
— 330-880 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MASSILLON OH
— 330-882 1XXX7XXX8XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 MANCHESTR OH
— 330-884 8XXX9XXX which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-885 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 YOUNGSTOWN OH
— 330-887 2XXX3XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WESTFLDCTR OH
— 330-889 1XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 BRISTOLVL OH
— 330-893 6XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BERLIN OH
— 330-894 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 EROCHESTER OH
— 330-895 not yet reported which blocks → PATTERSONVILLE TEL. CO. 0651 PATTERSNVL OH
— 330-896 not yet reported which blocks → OHIO BELL TEL CO 9321 GREENSBURG 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.