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 315
VERIZON NEW YORK, INC. 216
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 78
PAETEC ITEL, LLC 63
TWC IP ENABLED SERVICES, LLC 46
NEW CINGULAR WIRELESS PCS, LLC - DC 46
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
— 315-455 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
— 315-462 not yet reported which blocks → ONTARIO TELEPHONE COMPANY, INC. 0112 CLIFTONSPG 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
— 315-465 0XXX1XXX2XXX9XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 MANNSVILLE NY
— 315-466 1XXX2XXX3XXX4XXX6XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-467 not yet reported which blocks → SPOK, INC. 6630 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
— 315-480 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-481 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 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
— 315-486 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERTOWN 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
— 315-489 0XXX2XXX5XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 WATERTOWN NY
— 315-490 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 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
— 315-495 3XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM NEW YORK, INC. - FULTON 0106 MUNNSVILLE NY
— 315-496 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SEMPRONIUS NY
— 315-497 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 MORAVIA NY
— 315-498 0XXX1XXX5XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-499 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-501 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CAPEVINCNT NY
— 315-502 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E PALMYRA NY
— 315-505 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CICERO NY
— 315-506 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J LIVERPOOL NY
— 315-508 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 LITTLE FLS NY
— 315-509 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PULASKI NY
— 315-510 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CHITTENNGO 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.