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 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
— 518-483 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 MALONE NY
— 518-485 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-486 0XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-487 0XXX1XXX4XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-488 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-489 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-492 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 DANNEMORA NY
— 518-497 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → VERIZON NEW YORK, INC. 9104 CHATEAUGAY NY
— 518-498 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 COLONIE NY
— 518-499 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 WHITEHALL NY
— 518-523 6XXX which blocks → VERIZON NEW YORK, INC. 9104 LAKEPLACID NY
— 518-525 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-529 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 MOIRA NY
— 518-532 1XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHROON LK NY
— 518-543 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 HAGUE NY
— 518-546 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 PORT HENRY NY
— 518-547 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 PUTNAM NY
— 518-561 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-562 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-563 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-565 0XXX1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-566 1XXX3XXX4XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 PLATTSBG NY
— 518-576 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 KEENE NY
— 518-580 3XXX which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-581 6XXX which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-583 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-584 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-585 1XXX4XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 TICONDROGA NY
— 518-587 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-589 1XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 TANNERSVL NY
— 518-590 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-591 4XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-594 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ELENBGDPOT NY
— 518-598 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-622 1XXX4XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 CAIRO NY
— 518-623 0XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 WARRENSBG NY
— 518-626 0XXX1XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
— 518-627 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → VERIZON NEW YORK, INC. 9104 AMSTERDAM NY
— 518-629 0XXX1XXX5XXX6XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 TROY NY
— 518-631 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
— 518-632 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 HARTFORD NY
— 518-633 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SARATOGSPG NY
— 518-634 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 FREEHOLD NY
— 518-638 0XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 ARGYLE NY
— 518-639 0XXX1XXX2XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 FORT ANN NY
— 518-642 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 GRANVILLE NY
— 518-643 1XXX3XXX4XXX5XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 PERU NY
— 518-644 0XXX1XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 BOLTON LDG NY
— 518-656 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 KATTSKL BY NY
— 518-663 0XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 PITTSTOWN 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.