NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
— 937-272 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-273 3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 ELDORADO OH
— 937-274 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-275 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-276 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-277 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-278 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-279 4XXX7XXX which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-280 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J VANDALIA OH
— 937-281 not yet reported which blocks → CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B DAYTON OH
— 937-282 not yet reported which blocks → SPOK, INC. 6630 DAYTON OH
— 937-283 4XXX5XXX which blocks → FRONTIER NORTH, INC. - OH 0615 WILMINGTON OH
— 937-284 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 SPRINGFLD OH
— 937-285 0XXX1XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-286 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAYTON OH
— 937-287 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-288 0XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 DANVILLE OH
— 937-289 none assigned yet which blocks → FRONTIER NORTH, INC. - OH 0615 CLARKSVL OH
— 937-290 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-291 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-292 5XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 BELLEFNTAN OH
— 937-293 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-294 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-295 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 FT LORAMIE OH
— 937-296 6XXX which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-297 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-298 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-299 not yet reported which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-301 5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAYTON OH
— 937-304 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
— 937-305 2XXX which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
— 937-306 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J BEAVERCREK OH
— 937-307 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
— 937-308 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWCARLISL OH
— 937-309 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MARYSVILLE OH
— 937-310 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J BELLBROOK OH
— 937-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 937-312 4XXX5XXX7XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 DAYTON OH
— 937-313 none assigned yet which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
— 937-314 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J DONNELSVL OH
— 937-315 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J MEDWAY OH
— 937-316 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 GREENVILLE OH
— 937-317 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J SPRING VLY OH
— 937-318 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 FAIRBORN OH
— 937-319 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J YLSPGCLFTN OH
— 937-320 8XXX which blocks → OHIO BELL TEL CO 9321 BEAVERCREK OH
— 937-321 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 DAYTON OH
— 937-322 not yet reported which blocks → OHIO BELL TEL CO 9321 SPRINGFLD OH
— 937-323 not yet reported which blocks → OHIO BELL TEL CO 9321 SPRINGFLD OH
— 937-324 not yet reported which blocks → OHIO BELL TEL CO 9321 SPRINGFLD OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.