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
VERIZON NEW YORK, INC. 230
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 64
OMNIPOINT COMMUNICATIONS, INC. - NY 55
CABLEVISION LIGHTPATH, INC. - NY 55
LEVEL 3 COMMUNICATIONS, LLC - NY 53
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
— 631-389 8XXX which blocks → PAETEC ITEL, LLC 829J RONKONKOMA NY
— 631-390 not yet reported which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-391 6XXX which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-393 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-395 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ATLANTIC NY
— 631-396 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-398 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BRENTWOOD NY
— 631-399 8XXX which blocks → VERIZON NEW YORK, INC. 9104 ATLANTIC NY
— 631-400 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC- NY 384C CTRMORICHS NY
— 631-404 0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 BRENTWOOD NY
— 631-406 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → RCN TELECOM SERVICES, INC. - NY 7353 SMITHTOWN NY
— 631-409 8XXX which blocks → IP HORIZON LLC 515J NASSAUZN09 NY
— 631-410 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J COMMACK NY
— 631-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 631-412 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 LINDENHST NY
— 631-414 7XXX9XXX · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-415 2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CENTRAISLP NY
— 631-419 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 BAYPORT NY
— 631-420 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-421 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HUNTINGTON NY
— 631-422 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BABYLON NY
— 631-423 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HUNTINGTON NY
— 631-424 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HUNTINGTON NY
— 631-425 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HUNTINGTON NY
— 631-427 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HUNTINGTON NY
— 631-431 9XXX which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 CENTRAISLP NY
— 631-432 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
— 631-434 0XXX5XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 BRENTWOOD NY
— 631-435 5XXX which blocks → VERIZON NEW YORK, INC. 9104 BRENTWOOD NY
— 631-436 1XXX3XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 BRENTWOOD NY
— 631-439 not yet reported which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 CENTRAISLP NY
— 631-440 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 FIREISLAND NY
— 631-441 not yet reported which blocks → SPOK, INC. 6630 BRENTWOOD NY
— 631-442 not yet reported which blocks → SPOK, INC. 6630 BRENTWOOD NY
— 631-443 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 EASTPORT NY
— 631-444 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 STONYBROOK NY
— 631-447 4XXX which blocks → VERIZON NEW YORK, INC. 9104 PATCHOGUE NY
— 631-450 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC- NY 384C LINDENHST NY
— 631-451 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SELDEN NY
— 631-453 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 SELDEN NY
— 631-454 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-455 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 DEER PARK NY
— 631-457 0XXX2XXX3XXX9XXX · 2 holders which blocks → TC SYSTEMS, INC. - NY 7140 BRENTWOOD NY
— 631-458 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SAG HARBOR NY
— 631-460 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 KINGS PARK NY
— 631-462 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 W COMMACK NY
— 631-463 0XXX which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 CENTRAISLP NY
— 631-465 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 FARMINGDL NY
— 631-466 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 RIVERHEAD NY
— 631-467 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 RONKONKOMA 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.