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 518
VERIZON NEW YORK, INC. 225
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
— 518-384 4XXX5XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-386 8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-387 3XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-388 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-391 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-393 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-395 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-396 0XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-399 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-408 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-425 1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 BRAINADSVL NY
— 518-426 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-427 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-431 9XXX which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-432 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-433 9XXX which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-434 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-435 4XXX5XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-436 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-437 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-438 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-439 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-442 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-443 9XXX which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-445 4XXX5XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-446 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-447 9XXX which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-449 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-451 0XXX6XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-452 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 COLONIE NY
— 518-453 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-454 9XXX which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-455 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-456 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 COLONIE NY
— 518-457 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-458 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-459 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-462 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-463 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-464 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 COLONIE NY
— 518-465 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-471 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-472 0XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-475 8XXX which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-476 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-477 0XXX3XXX which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-478 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-479 1XXX2XXX5XXX7XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-481 0XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 MALONE NY
— 518-482 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY 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.