NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
— 603-644 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-645 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-646 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 HANOVER NH
— 603-647 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-648 none assigned yet which blocks → KEARSARGE TEL. CO. 0045 SALISBURY NH
— 603-650 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 HANOVER NH
— 603-651 0XXX1XXX3XXX · 3 holders which blocks → UNITED STATES CELLULAR - NH 6290 CTROSSIPEE NH
— 603-652 1XXX3XXX8XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MILTON NH
— 603-653 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 HANOVER NH
— 603-654 0XXX1XXX · 2 holders which blocks → WILTON TEL. CO. 0050 WILTON NH
— 603-655 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-656 none assigned yet which blocks → FIDIUM ENTERPRISE SERVICES, LLC 383J MANCHESTER NH
— 603-657 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J MANCHESTER NH
— 603-658 not yet reported which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 EXETER NH
— 603-659 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NEWMARKET NH
— 603-661 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MANCHESTER NH
— 603-662 0XXX2XXX · 2 holders which blocks → UNITED STATES CELLULAR - NH 6290 CONWAY NH
— 603-663 0XXX9XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-664 0XXX3XXX4XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 BARRINGTON NH
— 603-665 0XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-666 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-667 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 LEBANON NH
— 603-668 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-669 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-670 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MERRIMACK NH
— 603-671 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 FRANKLIN NH
— 603-672 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MILFORD NH
— 603-673 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MILFORD NH
— 603-674 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MANCHESTER NH
— 603-675 none assigned yet which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PLAINFIELD NH
— 603-676 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 HANOVER NH
— 603-677 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 MEREDITH NH
— 603-678 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 LEBANON NH
— 603-679 0XXX6XXX7XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 EPPING NH
— 603-680 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 631H HILLSBORO NH
— 603-681 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J SALEM NH
— 603-682 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MANCHESTER NH
— 603-683 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MERRIMACK NH
— 603-684 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 LANCASTER NH
— 603-685 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J SALEM NH
— 603-687 1XXX4XXX which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 JACKSON NH
— 603-689 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NASHUA NH
— 603-690 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 CLAREMONT NH
— 603-691 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H EXETER NH
— 603-692 1XXX8XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SOMERSWTH NH
— 603-693 0XXX2XXX5XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J EPPING NH
— 603-694 none assigned yet which blocks → CONSOLIDATED COMMUNICATIONS OF MAINE COMPANY 3316 CHATHAM NH
— 603-695 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-698 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 732J MANCHESTER NH
— 603-699 0–9 XXXall 10 · 7 holders which blocks → NUSO, LLC 732J NASHUA NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.