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 603
CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 247
BELL ATLANTIC MOBILE, INC 74
PAETEC ITEL, LLC 58
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 44
COMCAST IP PHONE, LLC 40
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
— 603-733 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 NO CONWAY NH
— 603-734 1XXX2XXX4XXX5XXX7XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 EPPING NH
— 603-735 none assigned yet which blocks → KEARSARGE TEL. CO. 0045 ANDOVER NH
— 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 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 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

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.