NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 19
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
— 614-628 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-629 4XXX7XXX8XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-630 not yet reported which blocks → SPOK, INC. 6630 ALTON OH
— 614-631 not yet reported which blocks → SPOK, INC. 6630 ALTON OH
— 614-633 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
— 614-634 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F COLUMBUS OH
— 614-635 7XXX9XXX · 2 holders which blocks → FIRST COMMUNICATIONS, LLC 460K WORTHINGTN OH
— 614-637 not yet reported which blocks → SPOK, INC. 6630 ALTON OH
— 614-638 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
— 614-644 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-645 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-646 not yet reported which blocks → SPOK, INC. 6630 COLUMBUS OH
— 614-648 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBUS OH
— 614-651 not yet reported which blocks → SPOK, INC. 6630 ALTON OH
— 614-652 1XXX which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DUBLIN OH
— 614-657 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
— 614-658 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 HILLIARD OH
— 614-659 2XXX5XXX7XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 DUBLIN OH
— 614-662 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 LOCKBOURNE OH
— 614-664 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HILLIARD OH
— 614-668 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
— 614-669 2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LOCKBOURNE OH
— 614-675 none assigned yet which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 ALTON OH
— 614-677 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-679 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
— 614-684 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HILLIARD OH
— 614-686 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 HARRISBURG OH
— 614-688 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-690 not yet reported which blocks → SPOK, INC. 6630 ALTON OH
— 614-691 not yet reported which blocks → SPOK, INC. 6630 ALTON OH
— 614-692 not yet reported which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
— 614-693 not yet reported which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
— 614-700 not yet reported which blocks → OH
— 614-708 0–9 XXXall 10 · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K GAHANNA OH
— 614-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 614-717 3XXX5XXX8XXX which blocks → OHIO BELL TEL CO 9321 DUBLIN OH
— 614-718 not yet reported which blocks → OHIO BELL TEL CO 9321 DUBLIN OH
— 614-719 9XXX which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-722 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-723 9XXX which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-724 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-726 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 DUBLIN OH
— 614-727 not yet reported which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
— 614-728 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-729 2XXX8XXX · 2 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 REYNOLDSBG OH
— 614-730 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 COLUMBUS OH
— 614-731 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 COLUMBUS OH
— 614-732 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K COLUMBUS OH
— 614-733 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 PLAIN CITY OH
— 614-734 4XXX which blocks → OHIO BELL TEL CO 9321 DUBLIN OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.