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 860
SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 325
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 63
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 60
TELEPORT COMMUNICATIONS AMERICA, LLC - CT 56
PAETEC ITEL, LLC 50
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
— 860-738 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 WINSTED CT
— 860-739 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NIANTIC CT
— 860-740 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J MIDDLETOWN CT
— 860-741 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ENFIELD CT
— 860-742 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 COVENTRY CT
— 860-745 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ENFIELD CT
— 860-746 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ENFIELD CT
— 860-747 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 PLAINVILLE CT
— 860-748 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
— 860-749 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ENFIELD CT
— 860-751 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J FARMINGTON CT
— 860-752 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WINDSORLKS CT
— 860-753 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PUTNAM CT
— 860-754 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDDLETOWN CT
— 860-755 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-756 0XXX5XXX6XXX · 2 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-757 3XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-758 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C WINDSORLKS CT
— 860-761 3XXX4XXX5XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J HARTFORD CT
— 860-763 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ENFIELD CT
— 860-764 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J CANTON CT
— 860-765 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-766 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 BRISTOL CT
— 860-767 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ESSEX CT
— 860-768 0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-769 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-770 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J NEWBRITAIN CT
— 860-773 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J FARMINGTON CT
— 860-774 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 DANIELSON CT
— 860-775 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - CT 639C E HAMPTON CT
— 860-776 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 ENFIELD CT
— 860-777 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 FARMINGTON CT
— 860-778 2XXX which blocks → METROPCS, INC. 5562 HARTFORD CT
— 860-779 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 DANIELSON CT
— 860-780 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GLASTONBY CT
— 860-781 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J GLASTONBY CT
— 860-782 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARWINTON CT
— 860-783 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CT 639C MANCHESTER CT
— 860-784 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 SIMSBURY CT
— 860-786 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WILLIMNTIC CT
— 860-787 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WINDSOR CT
— 860-788 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F MIDDLETOWN CT
— 860-789 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WINDSORLKS CT
— 860-790 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DEEP RIVER CT
— 860-791 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MANCHESTER CT
— 860-792 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PUTNAM CT
— 860-793 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 PLAINVILLE CT
— 860-794 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 HARTFORD CT
— 860-795 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J HARWINTON CT
— 860-796 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 HARTFORD CT

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.