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
2007-03-15 330-952 0–9 XXXall 10 · 4 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E MEDINA OH
2007-02-21 330-840 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TWINSBURG OH
2007-01-27 330-691 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWPHLDLPH OH
2006-07-24 330-973 0–9 XXXwhole prefix which blocks → OHIO BELL TEL CO 9321 AKRON OH
2006-07-10 330-937 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 MONTROSE OH
2006-05-09 330-991 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 DOYLESTOWN OH
2006-04-18 330-978 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARREN OH
2006-03-17 330-949 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON OH
2006-03-01 330-942 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2006-01-25 330-988 0–9 XXXall 10 · 4 holders which blocks → DOYLESTOWN COMMS, INC. DBA HERITAGE TELCO - OH 849C WOOSTER OH
2006-01-12 330-768 0–9 XXXall 10 · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C NO CANTON OH
2006-01-09 330-748 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 NORTHFIELD OH
2005-12-22 330-681 0XXX1XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DELLROY OH
2005-08-09 330-987 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWPHLDLPH OH
2005-08-01 330-979 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARREN OH
2005-07-13 330-932 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ELIVERPOOL OH
2005-07-11 330-546 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CANTON OH
2005-07-01 330-301 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 YOUNGSTOWN OH
2005-03-22 330-917 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 MARLBORO OH
2005-03-22 330-980 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 WARREN OH
2005-02-18 330-943 0XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 SHREVE OH
2005-02-01 330-407 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWPHLDLPH OH
2005-01-25 330-520 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 MARSHALLVL OH
2004-12-01 330-642 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 ORRVILLE OH
2004-09-27 330-765 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ORRVILLE OH
2004-09-08 330-302 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 LODI OH
2004-09-08 330-331 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 WADSWORTH OH
2004-08-19 330-312 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON OH
2004-07-30 330-960 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → SUPER-NET, INC. - OH 155F ORRVILLE OH
2004-07-29 330-778 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SUPER-NET, INC. - OH 155F APPLECREEK OH
2004-07-06 330-977 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HIRAM OH
2004-03-16 330-246 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORTLAND OH
2004-03-11 330-632 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EROCHESTER OH
2004-03-01 330-234 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOOSTER OH
2003-11-25 330-993 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WAYLAND OH
2003-11-12 330-631 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J AKRON OH
2003-11-10 330-622 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 AKRON OH
2003-08-12 330-397 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 YOUNGSTOWN OH
2003-05-21 330-771 1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MINERVA OH
2003-04-09 330-432 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWPHLDLPH OH
2003-02-25 330-749 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOOSTER OH
2003-01-30 330-341 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HANOVERTON OH
2002-12-17 330-470 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NO CANTON OH
2002-11-14 330-317 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WOOSTER OH
2002-11-12 330-574 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 NILES OH
2002-10-31 330-741 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 BRUNSWICK OH
2002-10-18 330-651 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YOUNGSTOWN OH
2002-10-07 330-636 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 MEDINA OH
2002-09-27 330-614 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ALLIANCE OH
2002-09-11 330-612 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON 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.