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
2001-10-03 330-230 none assigned yet which blocks → XO OHIO, INC. 7520 MOGADORE OH
2001-09-21 330-858 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
2001-09-21 330-933 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON OH
2001-09-18 330-817 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J LEETONIA OH
2001-09-18 330-822 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 ROGERS OH
2001-09-18 330-846 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 NEWWATERFD OH
2001-09-18 330-870 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 LISBON OH
2001-09-18 330-886 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 EPALESTINE OH
2001-09-18 330-892 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBIANA OH
2001-08-09 330-362 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WELLSVILLE OH
2001-08-09 330-366 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J NORTH LIMA OH
2001-08-09 330-368 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 ELIVERPOOL OH
2001-07-26 330-752 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AKRON OH
2001-07-26 330-754 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CANTON OH
2001-06-27 330-599 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
2001-06-23 330-708 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ELIVERPOOL OH
2001-06-22 330-459 none assigned yet which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2001-06-06 330-558 1XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BRUNSWICK OH
2001-05-31 330-446 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAMASCUS OH
2001-05-22 330-473 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MILLERSBG OH
2001-05-22 330-485 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 RITTMAN OH
2001-05-11 330-964 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LISBON OH
2001-05-11 330-969 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 SHARON OH
2001-05-08 330-462 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WOOSTER OH
2001-05-08 330-476 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CARROLLTON OH
2001-05-08 330-661 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MEDINA OH
2001-05-08 330-663 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 NEWPHLDLPH OH
2001-04-24 330-402 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YOUNGSTOWN OH
2001-04-24 330-646 3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARREN OH
2001-03-29 330-647 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARREN OH
2001-03-24 330-789 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SHREVE OH
2001-03-20 330-541 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 KENT OH
2001-02-21 330-671 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
2001-02-06 330-974 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WARREN OH
2001-01-10 330-209 0XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2001-01-10 330-421 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MEDINA OH
2001-01-05 330-883 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 WARREN OH
— 330-201 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOOSTER OH
— 330-202 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WOOSTER OH
— 330-203 0XXX1XXX4XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-204 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWPHLDLPH OH
— 330-205 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MINERVA OH
— 330-206 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ALLIANCE OH
— 330-207 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YOUNGSTOWN OH
— 330-208 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C AKRON OH
— 330-210 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E APPLECREEK OH
— 330-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 330-213 not yet reported which blocks → SPOK, INC. 6630 AKRON OH
— 330-214 not yet reported which blocks → SPOK, INC. 6630 CANTON OH
— 330-215 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 AKRON 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.