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
— 315-630 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C HAMILTON NY
— 315-631 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 CAMILLUS NY
— 315-632 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 FAYETTEVL NY
— 315-633 1XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 BRIDGEPORT NY
— 315-634 0XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
— 315-635 0XXX which blocks → VERIZON NEW YORK, INC. 9104 BALDWINSVL NY
— 315-636 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 AMBER NY
— 315-637 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FAYETTEVL NY
— 315-638 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BALDWINSVL NY
— 315-639 1XXX7XXX which blocks → TOWNSHIP TEL. CO., INC. 0129 DEXTER NY
— 315-640 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 SYRACUSE NY
— 315-641 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 LIVERPOOL NY
— 315-642 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 PHILA NY
— 315-643 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 MASSENA NY
— 315-644 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NATURALBDG NY
— 315-645 0XXX2XXX3XXX9XXX · 4 holders which blocks → ONVOY, LLC- NY 384C COPENHAGEN NY
— 315-646 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 SACKETSHBR NY
— 315-647 not yet reported which blocks → SPOK, INC. 6630 SYRACUSE NY
— 315-648 not yet reported which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 HAMILTON NY
— 315-649 1XXX7XXX8XXX9XXX · 3 holders which blocks → TOWNSHIP TEL. CO., INC. 0129 CHAUMONT NY
— 315-650 0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 4 holders which blocks → ONVOY, LLC- NY 384C CLAYTON NY
— 315-651 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WATERLOO NY
— 315-652 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 LIVERPOOL NY
— 315-653 0XXX1XXX2XXX5XXX6XXX8XXX · 6 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 SO OTSELIC NY
— 315-654 0XXX6XXX7XXX9XXX · 3 holders which blocks → TOWNSHIP TEL. CO., INC. 0129 CAPEVINCNT NY
— 315-655 not yet reported which blocks → WINDSTREAM NEW YORK, INC. - FULTON 0106 CAZENOVIA NY
— 315-656 1XXX6XXX which blocks → VERIZON NEW YORK, INC. 9104 MINOA NY
— 315-657 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → TC SYSTEMS, INC. - NY 7140 LIVERPOOL NY
— 315-658 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 LA FARGEVL NY
— 315-659 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 ANTWERP NY
— 315-660 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 WOLCOTT NY
— 315-661 6XXX which blocks → PAETEC ITEL, LLC 829J WATERTOWN NY
— 315-662 0XXX1XXX2XXX4XXX6XXX8XXX · 6 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 NEWWDSTOCK NY
— 315-663 1XXX4XXX5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J FAYETTEVL NY
— 315-664 1XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 AUBURN NY
— 315-665 0XXX1XXX2XXX3XXX6XXX8XXX · 4 holders which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 LYONS NY
— 315-666 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C CHITTENNGO NY
— 315-667 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 MARION NY
— 315-668 1XXX5XXX which blocks → WINDSTREAM NEW YORK, INC. - FULTON 0106 CENTRAL SQ NY
— 315-669 0XXX1XXX2XXX3XXX6XXX8XXX · 2 holders which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 DOLGEVILLE NY
— 315-670 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WATERLOO NY
— 315-671 not yet reported which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 SYRACUSE NY
— 315-672 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 CAMILLUS NY
— 315-673 5XXX6XXX7XXX · 3 holders which blocks → WINDSTREAM NEW YORK, INC. - FULTON 0106 MARCELLUS NY
— 315-674 0XXX4XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NICHOLVL NY
— 315-675 0XXX1XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 CLEVELAND NY
— 315-676 0XXX6XXX8XXX · 3 holders which blocks → WINDSTREAM NEW YORK, INC. - FULTON 0106 CENTRAL SQ NY
— 315-677 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 LAFAYETTE NY
— 315-678 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LYSANDER NY
— 315-681 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WATERTOWN 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.