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
— 603-785 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
— 603-788 6XXX7XXX8XXX9XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 LANCASTER NH
— 603-789 none assigned yet which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 DANBURY NH
— 603-791 0XXX4XXX which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NASHUA NH
— 603-792 not yet reported which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 MANCHESTER NH
— 603-795 0XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 LYME NH
— 603-796 7XXX which blocks → KEARSARGE TEL. CO. 0045 BOSCAWEN NH
— 603-797 0XXX1XXX2XXX3XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 PLAISTOW NH
— 603-798 9XXX which blocks → KEARSARGE TEL. CO. 0045 CHICHESTER NH
— 603-799 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 MANCHESTER NH
— 603-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NH
— 603-812 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 PORTSMOUTH NH
— 603-816 none assigned yet which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 NASHUA NH
— 603-819 0XXX1XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NH 4017 PLAISTOW NH
— 603-821 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J NASHUA NH
— 603-822 1XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J ROCHESTER NH
— 603-823 0XXX1XXX2XXX3XXX4XXX6XXX · 6 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 FRANCONIA NH
— 603-824 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 SALEM NH
— 603-826 0XXX1XXX2XXX6XXX7XXX8XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 CHARLESTN NH
— 603-827 0XXX1XXX2XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 HARRISVL NH
— 603-829 3XXX4XXX5XXX6XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 SUNAPEE NH
— 603-832 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J LACONIA NH
— 603-834 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J DOVER NH
— 603-835 0XXX1XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 ALSTEAD NH
— 603-837 0XXX1XXX6XXX7XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 WHITEFIELD NH
— 603-838 0XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 LISBON NH
— 603-839 1XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FARMINGTON NH
— 603-841 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SOMERSWTH NH
— 603-842 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J DOVER NH
— 603-843 5XXX6XXX7XXX8XXX · 3 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 NEWPORT NH
— 603-845 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J DERRY NH
— 603-846 2XXX6XXX8XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 TWIN MT NH
— 603-847 0XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 SULLIVAN NH
— 603-848 none assigned yet which blocks → UNITED STATES CELLULAR - NH 6290 CONCORD NH
— 603-851 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → BELL ATLANTIC MOBILE, INC 6386 MANCHESTER NH
— 603-852 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 KEENE NH
— 603-853 2XXX7XXX which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 WOODSVILLE NH
— 603-856 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J CONCORD NH
— 603-858 7XXX8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MANCHESTER NH
— 603-859 1XXX5XXX8XXX · 2 holders which blocks → UNION TEL. CO. 0049 NEW DURHAM NH
— 603-860 not yet reported which blocks → BELL ATLANTIC MOBILE, INC 6386 MANCHESTER NH
— 603-861 2XXX3XXX6XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 TAMWORTH NH
— 603-863 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NEWPORT NH
— 603-864 0XXX6XXX8XXX9XXX · 3 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NASHUA NH
— 603-865 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 NEWPORT NH
— 603-866 2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DOVER NH
— 603-867 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANCHESTER NH
— 603-868 not yet reported which blocks → CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 5113 DURHAM 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.