NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
— 603-665 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 0XXX1XXX2XXX3XXX5XXX8XXX · 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
— 603-700 not yet reported which blocks → NH
— 603-704 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NH 8299 DERRY NH
— 603-706 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J RAYMOND NH
— 603-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NH
— 603-712 0XXX1XXX3XXX5XXX6XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 PIKE NH
— 603-715 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J CONCORD NH
— 603-716 0–9 XXXall 10 · 3 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 MANCHESTER NH
— 603-717 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CONCORD NH
— 603-719 5XXX6XXX7XXX8XXX · 4 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 KEENE NH
— 603-723 none assigned yet which blocks → UNITED STATES CELLULAR - NH 6290 BERLIN NH
— 603-724 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J CONCORD NH
— 603-725 0XXX6XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 TAMWORTH NH
— 603-726 0XXX1XXX5XXX6XXX · 2 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CAMPTON NH
— 603-727 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J LEBANON NH
— 603-728 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 NOWOODSTOK NH
— 603-729 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 TILTON NH
— 603-730 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 NO CONWAY NH
— 603-731 not yet reported which blocks → BELL ATLANTIC MOBILE, INC 6386 CONCORD NH
— 603-732 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 MILFORD NH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.