NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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
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
— 631-694 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-696 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SELDEN NY
— 631-698 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SELDEN NY
— 631-716 1XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SELDEN NY
— 631-722 1XXX6XXX7XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 JAMESPORT NY
— 631-723 6XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 HAMPTNBAYS NY
— 631-724 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SMITHTOWN NY
— 631-725 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SAG HARBOR NY
— 631-726 0XXX2XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 WATER MILL NY
— 631-727 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 RIVERHEAD NY
— 631-728 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HAMPTNBAYS NY
— 631-732 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SELDEN NY
— 631-734 0XXX1XXX3XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 PECONIC NY
— 631-736 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SELDEN NY
— 631-737 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 RONKONKOMA NY
— 631-738 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 RONKONKOMA NY
— 631-744 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SHOREHAM NY
— 631-749 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SHELTER IS NY
— 631-751 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 STONYBROOK NY
— 631-752 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-753 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-754 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NORTHPORT NY
— 631-755 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-756 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 631-757 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NORTHPORT NY
— 631-758 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PATCHOGUE NY
— 631-765 7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SOUTHOLD 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
— 631-781 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-783 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-785 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 631-789 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 AMITYVILLE 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
— 631-821 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SHOREHAM NY
— 631-826 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 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
— 631-851 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 CENTRAISLP NY
— 631-852 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 RIVERHEAD NY
— 631-853 0XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 CENTRAISLP NY
— 631-854 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BRENTWOOD NY
— 631-858 4XXX which blocks → VERIZON NEW YORK, INC. 9104 W COMMACK NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.