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
— 937-788 not yet reported which blocks → THE CHAMPAIGN TELEPHONE COMPANY 0594 TERREHAUTE OH
— 937-795 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 ABERDEEN OH
— 937-804 7XXX9XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LEESBURG OH
— 937-809 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H DAYTON OH
— 937-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 937-823 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAYTON OH
— 937-824 0XXX which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-825 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAYTON OH
— 937-826 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WOODSTOCK OH
— 937-828 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 CATAWBA OH
— 937-829 not yet reported which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
— 937-830 4XXX8XXX which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
— 937-831 2XXX3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 SPRINGFLD OH
— 937-832 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 ENGLEWOOD OH
— 937-833 7XXX8XXX which blocks → FRONTIER NORTH, INC. - OH 0615 BROOKVILLE OH
— 937-834 4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MECHANCSBG OH
— 937-835 2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 LIBERTY OH
— 937-836 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 ENGLEWOOD OH
— 937-837 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 TROTWOOD OH
— 937-838 2XXX3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
— 937-839 2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WALEXNDRIA OH
— 937-840 4XXX7XXX8XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 HILLSBORO OH
— 937-842 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 RUSSELLSPT OH
— 937-843 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 RUSSELLSPT OH
— 937-844 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BELLEFNTAN OH
— 937-845 not yet reported which blocks → OHIO BELL TEL CO 9321 NEWCARLISL OH
— 937-846 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 NEWCARLISL OH
— 937-847 not yet reported which blocks → OHIO BELL TEL CO 9321 MSBGWCRLTN OH
— 937-848 0XXX1XXX which blocks → OHIO BELL TEL CO 9321 BELLBROOK OH
— 937-849 2XXX5XXX7XXX8XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 MEDWAY OH
— 937-850 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 DAYTON OH
— 937-852 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 SPRINGFLD OH
— 937-853 6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J DAYTON OH
— 937-854 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 TROTWOOD OH
— 937-855 not yet reported which blocks → HANSON COMMUNICATIONS OF OHIO, LLC-GERMANTOWN 0618 GERMANTOWN OH
— 937-857 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 CHRISTISBG OH
— 937-859 not yet reported which blocks → OHIO BELL TEL CO 9321 MSBGWCRLTN OH
— 937-862 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 SPRING VLY OH
— 937-863 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 ENON OH
— 937-864 6XXX8XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 ENON OH
— 937-865 not yet reported which blocks → OHIO BELL TEL CO 9321 MSBGWCRLTN OH
— 937-866 not yet reported which blocks → OHIO BELL TEL CO 9321 MSBGWCRLTN OH
— 937-869 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 URBANA OH
— 937-873 1XXX2XXX3XXX5XXX6XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 FAIRBORN OH
— 937-874 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 FAIRBORN OH
— 937-875 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 TROY OH
— 937-877 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → METROPCS, INC. 5562 TIPP CITY OH
— 937-878 not yet reported which blocks → OHIO BELL TEL CO 9321 FAIRBORN OH
— 937-879 not yet reported which blocks → OHIO BELL TEL CO 9321 FAIRBORN OH
— 937-882 0XXX2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 DONNELSVL 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.