NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
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
— 603-736 0XXX1XXX2XXX5XXX6XXX7XXX · 6 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 EPSOM NH
— 603-737 3XXX7XXX which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 LACONIA NH
— 603-738 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CONCORD NH
— 603-739 6XXX7XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 NOWOODSTOK NH
— 603-740 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DOVER NH
— 603-741 4XXX5XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 NEW BOSTON NH
— 603-742 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DOVER NH
— 603-743 none assigned yet which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DOVER NH
— 603-744 none assigned yet which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 BRISTOL NH
— 603-745 0XXX7XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NOWOODSTOK NH
— 603-746 0XXX1XXX which blocks → MERRIMACK COUNTY TEL. CO. 0047 CONTOOCOOK NH
— 603-747 9XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WOODSVILLE NH
— 603-749 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DOVER NH
— 603-750 3XXX8XXX9XXX · 2 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 383J DOVER NH
— 603-751 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 PELHAM NH
— 603-752 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 BERLIN NH
— 603-753 2XXX3XXX5XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 PENACOOK NH
— 603-754 0XXX5XXX · 2 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 LANCASTER NH
— 603-755 0XXX1XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 FARMINGTON NH
— 603-756 0XXX1XXX5XXX6XXX8XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WALPOLE NH
— 603-757 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J KEENE NH
— 603-758 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J HAMPTON NH
— 603-759 not yet reported which blocks → BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
— 603-761 4XXX5XXX which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 LITTLETON NH
— 603-762 6XXX7XXX8XXX9XXX · 2 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 KEENE NH
— 603-763 1XXX6XXX7XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SUNAPEE NH
— 603-764 1XXX6XXX7XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WARREN NH
— 603-765 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NASHUA NH
— 603-766 not yet reported which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 PORTSMOUTH NH
— 603-767 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DOVER NH
— 603-768 0XXX1XXX4XXX7XXX9XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DANBURY NH
— 603-769 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 MILFORD NH
— 603-770 not yet reported which blocks → BELL ATLANTIC MOBILE, INC 6386 EXETER NH
— 603-771 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 MANCHESTER NH
— 603-772 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 EXETER NH
— 603-773 3XXX8XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 EXETER NH
— 603-774 not yet reported which blocks → DUNBARTON TEL. CO. 0043 DUNBARTON NH
— 603-775 1XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 EXETER NH
— 603-776 2XXX6XXX which blocks → UNION TEL. CO. 0049 BARNSTEAD NH
— 603-777 0XXX1XXX2XXX6XXX7XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 EXETER NH
— 603-778 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 EXETER NH
— 603-779 0XXX1XXX3XXX5XXX6XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 PLYMOUTH NH
— 603-780 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 CANAAN NH
— 603-781 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DOVER NH
— 603-782 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 MANCHESTER NH
— 603-783 1XXX2XXX3XXX5XXX6XXX7XXX · 6 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CANTERBURY NH
— 603-784 2XXX4XXX5XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 PETERBROGH NH
— 603-785 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
— 603-786 4XXX5XXX6XXX7XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 RUMNEY NH
— 603-787 3XXX5XXX7XXX8XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WOODSVILLE NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.