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
— 330-342 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 HUDSON OH
— 330-343 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 NEWPHLDLPH OH
— 330-344 0XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-345 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WOOSTER OH
— 330-346 3XXX which blocks → OHIO BELL TEL CO 9321 KENT OH
— 330-347 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 WOOSTER OH
— 330-348 0XXX5XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 AURORA OH
— 330-350 3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 MEDINA OH
— 330-351 none assigned yet which blocks → T-MOBILE USA, INC. 6529 AKRON OH
— 330-352 none assigned yet which blocks → T-MOBILE USA, INC. 6529 AKRON OH
— 330-353 8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 CANTON OH
— 330-354 0XXX2XXX4XXX5XXX7XXX which blocks → T-MOBILE USA, INC. 6529 HARTVILLE OH
— 330-358 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WAYLAND OH
— 330-359 1XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WILMOT OH
— 330-360 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 YOUNGSTOWN OH
— 330-363 not yet reported which blocks → OHIO BELL TEL CO 9321 CANTON OH
— 330-364 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 NEWPHLDLPH OH
— 330-365 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 NEWPHLDLPH OH
— 330-367 5XXX7XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-369 9XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-370 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-372 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-373 8XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-374 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-375 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-376 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-377 none assigned yet which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 GLENMONT OH
— 330-378 none assigned yet which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 NASHVILLE OH
— 330-379 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-380 not yet reported which blocks → SPOK, INC. 6630 YOUNGSTOWN OH
— 330-381 not yet reported which blocks → SPOK, INC. 6630 LISBON OH
— 330-382 2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 ELIVERPOOL OH
— 330-383 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ELIVERPOOL OH
— 330-384 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-385 not yet reported which blocks → OHIO BELL TEL CO 9321 ELIVERPOOL OH
— 330-386 not yet reported which blocks → OHIO BELL TEL CO 9321 ELIVERPOOL OH
— 330-387 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 NILES OH
— 330-388 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-390 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILLERSBG OH
— 330-392 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-393 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-394 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-395 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-399 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-404 not yet reported which blocks → SPOK, INC. 6630 YOUNGSTOWN OH
— 330-405 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 TWINSBURG OH
— 330-408 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CANALFULTN OH
— 330-409 3XXX5XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CANTON OH
— 330-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 330-413 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON 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.