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
— 330-218 not yet reported which blocks → SPOK, INC. 6630 CANTON OH
— 330-219 none assigned yet which blocks → T-MOBILE USA, INC. 6529 WARREN OH
— 330-220 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 BRUNSWICK OH
— 330-221 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 KENT OH
— 330-222 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WINONA OH
— 330-223 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 HANOVERTON OH
— 330-225 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 BRUNSWICK OH
— 330-227 1XXX2XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 ROGERS OH
— 330-229 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 YOUNGSTOWN OH
— 330-231 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MILLERSBG OH
— 330-232 7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON OH
— 330-233 none assigned yet which blocks → T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
— 330-235 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RAVENNA OH
— 330-237 not yet reported which blocks → ONVOY, LLC - OH 464C AKRON OH
— 330-239 8XXX which blocks → FRONTIER NORTH, INC. - OH 0615 SHARON CTR OH
— 330-241 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MEDINA OH
— 330-242 7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MEDINA OH
— 330-243 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWPHLDLPH OH
— 330-244 6XXX7XXX which blocks → OHIO BELL TEL CO 9321 NO CANTON OH
— 330-245 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-247 0XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AKRON OH
— 330-248 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ALLIANCE OH
— 330-249 1XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ATWATER OH
— 330-250 not yet reported which blocks → SPOK, INC. 6630 AKRON OH
— 330-252 7XXX which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-253 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-254 not yet reported which blocks → SPOK, INC. 6630 WARREN OH
— 330-255 8XXX9XXX which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-256 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
— 330-257 6XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALLIANCE OH
— 330-258 3XXX which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-259 2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J YOUNGSTOWN OH
— 330-260 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWPHLDLPH OH
— 330-261 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YOUNGSTOWN OH
— 330-262 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WOOSTER OH
— 330-263 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WOOSTER OH
— 330-264 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WOOSTER OH
— 330-265 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
— 330-266 3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NO CANTON OH
— 330-267 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HARTVILLE OH
— 330-268 0XXX which blocks → T-MOBILE USA, INC. 6529 CANTON OH
— 330-269 4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J HUBBARD OH
— 330-270 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-271 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LISBON OH
— 330-272 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 YOUNGSTOWN OH
— 330-273 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 BRUNSWICK OH
— 330-274 1XXX4XXX6XXX7XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 MANTUA OH
— 330-276 8XXX9XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 KILLBUCK OH
— 330-277 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 SALEM OH
— 330-278 0XXX1XXX6XXX8XXX · 3 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 HINCKLEY 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.