NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 607
VERIZON NEW YORK, INC. 111
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
— 607-238 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 BINGHAMTON NY
— 607-248 9XXX which blocks → VERIZON NEW YORK, INC. 9104 CORNING NY
— 607-254 0XXX which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-256 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-257 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-264 0XXX2XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 CHERRY VLY NY
— 607-266 1XXX6XXX which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-269 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-271 0XXX1XXX5XXX6XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ELMIRA NY
— 607-272 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-273 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-274 0XXX which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-275 4XXX5XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-277 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-278 0XXX1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 DAVENPORT NY
— 607-281 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 HORNELL NY
— 607-286 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 MILFORD NY
— 607-293 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 HARTWICK NY
— 607-295 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 ARKPORT NY
— 607-324 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HORNELL NY
— 607-326 0XXX1XXX2XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 ROXBURY NY
— 607-397 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 WORCESTER NY
— 607-431 0XXX3XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ONEONTA NY
— 607-432 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ONEONTA NY
— 607-433 7XXX which blocks → VERIZON NEW YORK, INC. 9104 ONEONTA NY
— 607-436 5XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ONEONTA NY
— 607-523 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 LINDLEY NY
— 607-524 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 CATON NY
— 607-527 0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 CAMPBELL NY
— 607-533 0XXX1XXX2XXX6XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 LANSING NY
— 607-535 1XXX5XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 WATKISGLEN NY
— 607-538 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 HOBART NY
— 607-544 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 COOPERSTN NY
— 607-545 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 CANASERAGA NY
— 607-547 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 COOPERSTN NY
— 607-562 0XXX1XXX5XXX6XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 BIG FLATS NY
— 607-564 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 NEWFIELD NY
— 607-565 0XXX1XXX5XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 WAVERLY NY
— 607-566 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 AVOCA NY
— 607-583 0XXX1XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 SAVONA NY
— 607-588 0XXX1XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 GRANDGORGE NY
— 607-638 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENEVUS NY
— 607-643 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ONEONTA NY
— 607-645 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 ITHACA NY
— 607-651 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 BINGHAMTON NY
— 607-652 0XXX1XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 STAMFORD NY
— 607-654 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 CORNING NY
— 607-658 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 ENDICOTT NY
— 607-662 3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 CORTLAND NY
— 607-664 0XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 BATH NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.