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
— 937-883 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → OHIO BELL TEL CO 9321 SOUTHSOLON OH
— 937-884 0XXX1XXX2XXX3XXX4XXX6XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 PHILLIPSBG OH
— 937-885 not yet reported which blocks → OHIO BELL TEL CO 9321 CENTERVLLE OH
— 937-886 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 CENTERVLLE OH
— 937-890 not yet reported which blocks → OHIO BELL TEL CO 9321 VANDALIA OH
— 937-898 not yet reported which blocks → OHIO BELL TEL CO 9321 VANDALIA OH
— 937-899 none assigned yet which blocks → TWC IP ENABLED SERVICES, LLC 793K UNION CITY OH
— 937-901 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-902 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-903 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-904 not yet reported which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DAYTON OH
— 937-910 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DAYTON OH
— 937-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 937-912 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BEAVERCREK OH
— 937-913 6XXX which blocks → NUSO, LLC 732J DAYTON OH
— 937-914 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MSBGWCRLTN OH
— 937-916 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PIQUA OH
— 937-917 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SPRINGFLD OH
— 937-918 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 VANDALIA OH
— 937-919 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 XENIA OH
— 937-921 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 PIQUA OH
— 937-923 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 NEWCARLISL OH
— 937-925 4XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD OH
— 937-926 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD OH
— 937-927 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → OHIO BELL TEL CO 9321 SUGRTRERDG OH
— 937-935 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BELLEFNTAN OH
— 937-939 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H HILLSBORO OH
— 937-940 not yet reported which blocks → SPOK, INC. 6630 DAYTON OH
— 937-947 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 LAURA OH
— 937-950 not yet reported which blocks → OH
— 937-958 not yet reported which blocks → OH
— 937-959 not yet reported which blocks → OH
— 937-962 0XXX3XXX6XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 LEWISBURG OH
— 937-964 0XXX2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 NO HAMPTON OH
— 937-965 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K DAYTON OH
— 937-968 none assigned yet which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 UNION CITY OH
— 937-969 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 TREMONT CY OH
— 937-973 not yet reported which blocks → SPOK, INC. 6630 DAYTON OH
— 937-974 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 937-977 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H DAYTON OH
— 937-978 not yet reported which blocks → SPOK, INC. 6630 ENON OH
— 937-981 8XXX which blocks → FRONTIER NORTH, INC. - OH 0615 GREENFIELD OH
— 937-982 1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 BYHALIA OH
— 937-987 1XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 NEW VIENNA OH
— 937-996 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 NEWMADISON OH
— 937-997 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 HOLLANSBG 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.