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
— 330-595 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J UNIONTOWN OH
— 330-596 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → OHIO BELL TEL CO 9321 ALLIANCE OH
— 330-597 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J ATWATER OH
— 330-598 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 MONTROSE OH
— 330-602 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 NEWPHLDLPH OH
— 330-603 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-604 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-605 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON OH
— 330-606 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-607 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-608 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-609 2XXX3XXX4XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 WARREN OH
— 330-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 330-613 not yet reported which blocks → SPOK, INC. 6630 YOUNGSTOWN OH
— 330-615 1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-618 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-620 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
— 330-621 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 WOOSTER OH
— 330-623 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
— 330-624 2XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BURBANK OH
— 330-625 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 HOMERVILLE OH
— 330-626 not yet reported which blocks → OHIO BELL TEL CO 9321 KENT OH
— 330-627 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 CARROLLTON OH
— 330-628 not yet reported which blocks → OHIO BELL TEL CO 9321 MOGADORE OH
— 330-629 not yet reported which blocks → OHIO BELL TEL CO 9321 YOUNGSTOWN OH
— 330-630 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-633 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-634 3XXX4XXX5XXX6XXX7XXX which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-637 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 CORTLAND OH
— 330-638 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 CORTLAND OH
— 330-639 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CANTON OH
— 330-640 not yet reported which blocks → SPOK, INC. 6630 YOUNGSTOWN OH
— 330-641 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WOOSTER OH
— 330-643 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-644 not yet reported which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-645 5XXX8XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 AKRON OH
— 330-648 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 SPENCER OH
— 330-649 1XXX2XXX3XXX7XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 CANTON OH
— 330-650 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 HUDSON OH
— 330-652 not yet reported which blocks → OHIO BELL TEL CO 9321 NILES OH
— 330-653 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 HUDSON OH
— 330-654 6XXX7XXX8XXX which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 LAKEMILTON OH
— 330-655 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 HUDSON OH
— 330-656 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 NORTHFIELD OH
— 330-657 0XXX4XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 PENINSULA OH
— 330-658 not yet reported which blocks → DOYLESTOWN TEL. CO. 0609 DOYLESTOWN OH
— 330-659 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 RICHFIELD OH
— 330-660 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 YOUNGSTOWN OH
— 330-664 9XXX which blocks → FRONTIER NORTH, INC. - OH 0615 MONTROSE OH
— 330-665 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 MONTROSE 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.