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
— 631-774 none assigned yet which blocks → METROPCS, INC. 5562 BRENTWOOD NY
— 631-775 none assigned yet which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 YAPHANK NY
— 631-776 3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 BELLPORT NY
— 631-777 0XXX6XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-778 1XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 CENTRAISLP NY
— 631-779 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CSC VOICE, LLC 612K JAMESPORT NY
— 631-780 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 SMITHTOWN NY
— 631-781 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-782 0XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J DEER PARK NY
— 631-783 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-784 0XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 CENTRAISLP NY
— 631-785 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-787 2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 CENTRAISLP NY
— 631-788 not yet reported which blocks → FISHERS ISLAND TEL. CORP. 0095 FISHERS IS NY
— 631-789 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 AMITYVILLE NY
— 631-791 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 PTJEFFERSN NY
— 631-792 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 BABYLON NY
— 631-794 not yet reported which blocks → PAETEC ITEL, LLC 829J FARMINGDL NY
— 631-795 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-797 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-798 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-799 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-800 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C SOUTHAMPTN NY
— 631-801 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 EASTPORT NY
— 631-802 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PTJEFFERSN NY
— 631-803 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 BELLPORT NY
— 631-808 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SAG HARBOR NY
— 631-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 631-815 0XXX2XXX3XXX5XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 FARMINGDL NY
— 631-817 3XXX4XXX6XXX7XXX9XXX which blocks → ONVOY, LLC- NY 384C FIREISLAND NY
— 631-820 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 RONKONKOMA NY
— 631-821 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SHOREHAM NY
— 631-822 0XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CENTRAISLP NY
— 631-823 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TC SYSTEMS, INC. - NY 7140 BAYPORT NY
— 631-824 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J HUNTINGTON NY
— 631-826 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-828 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 PTJEFFERSN NY
— 631-830 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 RIVERHEAD NY
— 631-831 none assigned yet which blocks → METROPCS, INC. 5562 BRENTWOOD NY
— 631-832 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 BAYPORT NY
— 631-834 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
— 631-837 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NORTHPORT NY
— 631-838 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRENTWOOD NY
— 631-840 0XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ISLIP NY
— 631-841 8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 AMITYVILLE NY
— 631-842 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 AMITYVILLE NY
— 631-843 6XXX which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-844 5XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-845 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-847 3XXX which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL 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.