NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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 646
VERIZON NEW YORK, INC. 92
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
— 646-497 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-505 7XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-521 0XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-534 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-548 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-557 8XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-562 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-576 0XXX1XXX4XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-587 2XXX3XXX4XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-598 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-602 4XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-613 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-625 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-638 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-654 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-658 0XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-672 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-674 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-685 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-697 0–9 XXXwhole prefix which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-698 1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-710 0XXX4XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-728 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-733 4XXX6XXX7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-735 1XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-742 7XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-756 0XXX1XXX4XXX5XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-769 0XXX1XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-797 0–9 XXXall 10 · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-826 9XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-835 0XXX2XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-836 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-840 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-848 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-865 0XXX1XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-890 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-902 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-910 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 XXXXXXXXXX NY
— 646-935 9XXX which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-936 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-955 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
— 646-985 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.