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 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
— 330-279 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 HOLMESVL OH
— 330-280 5XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON OH
— 330-281 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 RAVENNA OH
— 330-282 1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 CORTLAND OH
— 330-283 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
— 330-284 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON OH
— 330-285 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
— 330-286 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J CANFIELD OH
— 330-287 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WOOSTER OH
— 330-288 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J GIRARD OH
— 330-289 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
— 330-291 not yet reported which blocks → SPOK, INC. 6630 AKRON OH
— 330-292 not yet reported which blocks → SPOK, INC. 6630 CANTON OH
— 330-294 0XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - OH 464C AKRON OH
— 330-296 not yet reported which blocks → OHIO BELL TEL CO 9321 RAVENNA OH
— 330-297 not yet reported which blocks → OHIO BELL TEL CO 9321 RAVENNA OH
— 330-298 5XXX6XXX7XXX8XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 RAVENNA OH
— 330-299 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NILES OH
— 330-304 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MEDINA OH
— 330-305 2XXX7XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 NO CANTON OH
— 330-306 8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-307 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 WARREN OH
— 330-308 2XXX4XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 NEWPHLDLPH OH
— 330-309 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON OH
— 330-310 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
— 330-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 330-314 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → AT&T - LOCAL 7421 YOUNGSTOWN OH
— 330-315 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
— 330-316 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON OH
— 330-318 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 YOUNGSTOWN OH
— 330-319 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AT&T - LOCAL 7421 AKRON OH
— 330-320 not yet reported which blocks → SPOK, INC. 6630 CANTON OH
— 330-321 0XXX which blocks → T-MOBILE USA, INC. 6529 MEDINA OH
— 330-322 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
— 330-323 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON OH
— 330-324 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON OH
— 330-325 4XXX which blocks → OHIO BELL TEL CO 9321 ROOTSTOWN OH
— 330-326 4XXX5XXX6XXX7XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WINDHAM OH
— 330-327 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CANTON OH
— 330-328 none assigned yet which blocks → T-MOBILE USA, INC. 6529 AKRON OH
— 330-329 none assigned yet which blocks → T-MOBILE USA, INC. 6529 AKRON OH
— 330-330 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
— 330-332 not yet reported which blocks → OHIO BELL TEL CO 9321 SALEM OH
— 330-334 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 WADSWORTH OH
— 330-335 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 WADSWORTH OH
— 330-336 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 WADSWORTH OH
— 330-337 not yet reported which blocks → OHIO BELL TEL CO 9321 SALEM OH
— 330-338 0XXX which blocks → T-MOBILE USA, INC. 6529 AKRON OH
— 330-339 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 NEWPHLDLPH OH
— 330-340 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWPHLDLPH 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.