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
LEVEL 3 TELECOM OF OHIO, LLC - OH 29
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
2014-10-14 614-641 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
2014-03-12 614-831 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 GAHANNA OH
2012-02-01 614-701 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
2007-03-27 614-754 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
2004-04-06 614-917 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
2002-12-27 614-553 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DUBLIN OH
2001-06-05 614-382 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CANALWHSTR OH
— 614-212 0XXX2XXX3XXX4XXX6XXX · 3 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 WESTERVL OH
— 614-219 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 HILLIARD OH
— 614-255 8XXX which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
— 614-289 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 NEW ALBANY OH
— 614-384 1XXX3XXX5XXX6XXX · 2 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
— 614-396 1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 WORTHINGTN OH
— 614-422 not yet reported which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 GAHANNA OH
— 614-482 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 GROVEPORT OH
— 614-489 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 LOCKBOURNE OH
— 614-624 not yet reported which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
— 614-652 1XXX which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DUBLIN 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
— 614-727 not yet reported which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
— 614-729 2XXX8XXX · 2 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 REYNOLDSBG OH
— 614-757 not yet reported which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DUBLIN OH
— 614-827 3XXX4XXX5XXX · 3 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 COLUMBUS OH
— 614-872 2XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 ALTON OH
— 614-918 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 WESTERVL OH
— 614-944 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 GAHANNA OH
— 614-945 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 GROVE CITY OH
— 614-951 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 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.