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 631
CABLEVISION LIGHTPATH, INC. - NY 55
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
2019-10-09 631-634 0–9 XXXall 10 · 7 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 COMMACK NY
2018-10-30 631-818 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BABYLON NY
2018-06-14 631-313 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 ISLIP NY
2018-06-06 631-710 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 RONKONKOMA NY
2018-04-24 631-469 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BRENTWOOD NY
2018-04-13 631-309 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 AMITYVILLE NY
2013-09-16 631-992 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 DEER PARK NY
2012-05-30 631-257 0–9 XXXall 10 · 7 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 SMITHTOWN NY
2011-10-10 631-417 0–9 XXXall 10 · 7 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BABYLON NY
2011-09-30 631-330 0–9 XXXwhole prefix which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
2011-06-22 631-620 0–9 XXXall 10 · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BABYLON NY
2005-11-03 631-627 0–9 XXXall 10 · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 PATCHOGUE NY
2001-09-25 631-237 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BRIDGEMPTN NY
2001-01-16 631-846 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 SELDEN NY
— 631-390 not yet reported which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-393 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-396 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-414 7XXX9XXX · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-439 not yet reported which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 CENTRAISLP NY
— 631-465 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-470 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 HUNTINGTON NY
— 631-486 0XXX2XXX4XXX6XXX8XXX9XXX · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 W COMMACK NY
— 631-539 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BABYLON NY
— 631-591 0XXX1XXX2XXX3XXX6XXX · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 RIVERHEAD NY
— 631-592 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 LINDENHST NY
— 631-608 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 AMITYVILLE NY
— 631-622 not yet reported which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-630 not yet reported which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 CENTRAISLP NY
— 631-635 0–9 XXXall 10 · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BABYLON NY
— 631-647 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BAY SHORE NY
— 631-648 0XXX3XXX7XXX8XXX9XXX which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 RONKONKOMA NY
— 631-650 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 ISLIP NY
— 631-656 0XXX5XXX6XXX8XXX which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 SMITHTOWN NY
— 631-659 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 COLDSPGHBR NY
— 631-663 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 KINGS PARK NY
— 631-670 0XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 COMMACK NY
— 631-675 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 STONYBROOK NY
— 631-686 0XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 ST JAMES NY
— 631-719 not yet reported which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-730 0XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 PATCHOGUE NY
— 631-750 3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 SAYVILLE NY
— 631-761 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 CENTRAISLP NY
— 631-772 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 ATLANTIC NY
— 631-775 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 YAPHANK NY
— 631-801 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 EASTPORT NY
— 631-803 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BELLPORT NY
— 631-828 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 PTJEFFERSN NY
— 631-849 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 SHOREHAM NY
— 631-868 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BAYPORT NY
— 631-886 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 WADING RIV NY

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.