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
2002-09-11 330-635 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MEDINA OH
2002-09-05 330-610 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 YOUNGSTOWN OH
2002-08-27 330-601 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SUPER-NET, INC. - OH 155F WOOSTER OH
2002-08-21 330-212 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
2002-08-21 330-224 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON OH
2002-07-25 330-460 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BRUNSWICK OH
2002-07-23 330-556 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWPHLDLPH OH
2002-07-23 330-591 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MEDINA OH
2002-07-19 330-410 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MEDINA OH
2002-07-17 330-557 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKEMILTON OH
2002-07-08 330-523 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 RICHFIELD OH
2002-06-27 330-240 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARREN OH
2002-06-27 330-469 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WARREN OH
2002-06-26 330-440 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWPHLDLPH OH
2002-06-26 330-441 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MEDINA OH
2002-06-26 330-449 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BERLIN OH
2002-06-25 330-401 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWPHLDLPH OH
2002-06-25 330-403 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BERLIN OH
2002-06-25 330-436 not yet reported which blocks → FIRST COMMUNICATIONS, LLC 460K AKRON OH
2002-05-29 330-662 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MEDINA OH
2002-05-08 330-439 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WOOSTER OH
2002-04-30 330-303 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ELIVERPOOL OH
2002-04-30 330-423 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 YOUNGSTOWN OH
2002-04-30 330-984 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WARREN OH
2002-04-24 330-361 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 NO CANTON OH
2002-04-22 330-396 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 MONTROSE OH
2002-04-17 330-398 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YOUNGSTOWN OH
2002-04-10 330-357 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MANTUA OH
2002-04-08 330-934 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 NEWPHLDLPH OH
2002-04-08 330-998 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 TWINSBURG OH
2002-03-21 330-236 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MASSILLON OH
2002-03-21 330-238 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ALLIANCE OH
2002-03-21 330-931 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 KENT OH
2002-03-20 330-356 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALLIANCE OH
2002-03-20 330-389 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 RAVENNA OH
2002-03-20 330-391 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MEDINA OH
2002-03-20 330-412 5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2002-03-20 330-619 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 SHARON OH
2002-03-20 330-766 4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 WARREN OH
2002-03-20 330-881 not yet reported which blocks → T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2002-03-20 330-990 not yet reported which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2002-02-28 330-313 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2002-01-12 330-371 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2002-01-11 330-355 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 KINSMAN OH
2002-01-08 330-349 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C NILES OH
2002-01-08 330-989 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 NILES OH
2001-12-19 330-975 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SEVILLE OH
2001-11-12 330-431 none assigned yet which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2001-11-08 330-941 0XXX5XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
2001-10-15 330-986 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 YOUNGSTOWN 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.