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 614
OHIO BELL TEL CO 254
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 96
AERIAL COMMUNICATIONS, INC. 89
NEW CINGULAR WIRELESS PCS, LLC - IL 46
PAETEC ITEL, LLC 44
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
— 614-573 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 COLUMBUS OH
— 614-574 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J GROVEPORT OH
— 614-575 7XXX which blocks → OHIO BELL TEL CO 9321 REYNOLDSBG OH
— 614-577 not yet reported which blocks → OHIO BELL TEL CO 9321 REYNOLDSBG OH
— 614-578 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
— 614-579 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
— 614-580 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
— 614-581 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
— 614-582 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
— 614-583 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 COLUMBUS OH
— 614-585 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HARRISBURG OH
— 614-586 2XXX3XXX5XXX6XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J COLUMBUS OH
— 614-588 2XXX3XXX4XXX5XXX6XXX7XXX9XXX which blocks → PAETEC ITEL, LLC 829J DUBLIN OH
— 614-590 not yet reported which blocks → SPOK, INC. 6630 COLUMBUS OH
— 614-594 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J GROVE CITY OH
— 614-595 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
— 614-596 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
— 614-598 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
— 614-599 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
— 614-601 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → AT&T - LOCAL 7421 WORTHINGTN OH
— 614-602 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 DUBLIN OH
— 614-604 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T - LOCAL 7421 REYNOLDSBG OH
— 614-606 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HILLIARD OH
— 614-607 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBUS OH
— 614-608 not yet reported which blocks → SPOK, INC. 6630 DUBLIN OH
— 614-610 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GROVEPORT OH
— 614-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 614-617 not yet reported which blocks → SPOK, INC. 6630 COLUMBUS OH
— 614-619 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBUS OH
— 614-620 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBUS OH
— 614-621 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 614-624 not yet reported which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
— 614-627 not yet reported which blocks → OHIO BELL TEL CO 9321 COLUMBUS OH
— 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

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.