NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 315
VERIZON NEW YORK, INC. 216
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
— 315-705 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 MASSENA NY
— 315-706 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-707 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SKANEATLES NY
— 315-708 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-709 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ROME NY
— 315-712 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 SENECA FLS NY
— 315-714 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 CANTON NY
— 315-715 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 LIVERPOOL NY
— 315-720 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 BALDWINSVL NY
— 315-721 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-724 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-731 0XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-732 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-733 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-734 5XXX which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-735 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-736 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-737 1XXX2XXX3XXX4XXX6XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-738 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-742 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 POTSDAM NY
— 315-754 0XXX1XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 RED CREEK NY
— 315-762 0XXX1XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SYLVAN BCH NY
— 315-764 8XXX which blocks → VERIZON NEW YORK, INC. 9104 MASSENA NY
— 315-765 0XXX1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-768 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-769 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 MASSENA NY
— 315-773 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 WATERTOWN NY
— 315-775 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 WATERTOWN NY
— 315-779 0XXX4XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 WATERTOWN NY
— 315-781 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 GENEVA NY
— 315-782 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 WATERTOWN NY
— 315-784 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 OWASCO NY
— 315-785 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 WATERTOWN NY
— 315-786 9XXX which blocks → VERIZON NEW YORK, INC. 9104 WATERTOWN NY
— 315-787 0XXX1XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 GENEVA NY
— 315-788 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 WATERTOWN NY
— 315-789 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 GENEVA NY
— 315-792 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-793 7XXX which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-797 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-798 7XXX which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-799 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 UTICA NY
— 315-814 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 MADRID NY
— 315-823 7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 LITTLE FLS NY
— 315-824 4XXX5XXX7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 HAMILTON NY
— 315-825 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 HAMILTON NY
— 315-834 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 WEEDSPORT NY
— 315-848 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 STAR LAKE NY
— 315-850 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 XXXXXXXXXX NY
— 315-853 0XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 CLINTON NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.