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 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
— 315-426 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-428 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-429 0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 DOLGEVILLE NY
— 315-431 5XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-432 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-433 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-434 5XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-435 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-437 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-438 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-442 8XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-443 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-445 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-446 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-448 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-449 6XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-451 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-452 6XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-453 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-454 1XXX2XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-455 0XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-456 8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-457 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-458 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-459 1XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-460 0XXX5XXX6XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-461 7XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-463 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-464 0XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-466 1XXX2XXX3XXX4XXX6XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-468 7XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-469 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-470 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-471 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-472 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-473 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-474 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-475 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-476 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-477 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-478 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-479 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-482 0XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALEXNDRIBY NY
— 315-483 7XXX which blocks → VERIZON NEW YORK, INC. 9104 SODUS NY
— 315-484 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-485 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-487 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-488 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-492 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-493 8XXX which blocks → VERIZON NEW YORK, INC. 9104 CARTHAGE 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.