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
2024-06-25 330-216 1XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K PATTERSNVL OH
2024-03-12 330-709 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K MANTUA OH
2023-11-06 330-919 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WARREN OH
2023-09-01 330-902 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 RAVENNA OH
2023-08-24 330-900 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANTUA OH
2023-08-17 330-500 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON OH
2023-08-04 330-200 2XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SHARON OH
2023-08-04 330-300 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H ORRVILLE OH
2023-06-29 330-909 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANTUA OH
2022-12-05 330-586 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANTUA OH
2022-10-28 330-582 1XXX2XXX which blocks → NUSO, LLC 732J DELLROY OH
2022-10-06 330-228 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANTUA OH
2022-09-01 330-226 0XXX2XXX6XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SUGARCREEK OH
2019-12-17 330-918 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H YOUNGSTOWN OH
2019-10-15 330-293 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D TWINSBURG OH
2019-08-28 330-910 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AURORA OH
2018-08-24 330-443 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX which blocks → ONVOY, LLC - OH 464C HARTFORD OH
2015-04-07 330-891 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORTLAND OH
2014-04-09 330-295 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F MANCHESTR OH
2012-07-24 330-251 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CORTLAND OH
2012-02-02 330-905 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH
2012-01-13 330-616 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C NO CANTON OH
2011-12-19 330-290 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CORTLAND OH
2011-12-19 330-890 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NO CANTON OH
2011-12-06 330-915 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CANTON OH
2011-01-10 330-600 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MILLERSBG OH
2011-01-06 330-400 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 AKRON OH
2010-02-04 330-800 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J AKRON OH
2010-02-02 330-888 0–9 XXXall 10 · 4 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 TWINSBURG OH
2009-12-04 330-913 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C ALLIANCE OH
2009-11-04 330-217 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
2009-10-16 330-999 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2009-09-30 330-617 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2009-09-30 330-906 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2008-09-30 330-275 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MILLERSBG OH
2008-07-03 330-809 0–9 XXXall 10 · 3 holders which blocks → SUPER-NET, INC. - OH 155F MASSILLON OH
2008-06-19 330-907 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
2008-05-28 330-333 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F YOUNGSTOWN OH
2008-03-20 330-992 0–9 XXXall 10 · 7 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E NO JACKSON OH
2008-03-20 330-997 0XXX1XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E BERLIN CTR OH
2008-01-03 330-406 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C YOUNGSTOWN OH
2007-11-28 330-951 0–9 XXXall 10 · 2 holders which blocks → FIRST COMMUNICATIONS, LLC 460K YOUNGSTOWN OH
2007-11-13 330-994 not yet reported which blocks → FIRST COMMUNICATIONS, LLC 460K CANTON OH
2007-10-17 330-970 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J CANALFULTN OH
2007-08-01 330-967 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CANFIELD OH
2007-06-06 330-956 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CANTON OH
2007-04-18 330-954 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 AURORA OH
2007-04-13 330-930 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E ORRVILLE OH
2007-04-13 330-953 0–9 XXXall 10 · 2 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E YOUNGSTOWN OH
2007-04-13 330-985 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E DALTON 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.