NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
— 860-824 6XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 CANAAN CT
— 860-825 not yet reported which blocks → SPOK, INC. 6630 HARTFORD CT
— 860-826 9XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEWBRITAIN CT
— 860-827 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEWBRITAIN CT
— 860-828 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEWBRITAIN CT
— 860-829 7XXX9XXX · 2 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEWBRITAIN CT
— 860-830 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
— 860-831 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J WINDSORLKS CT
— 860-832 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEWBRITAIN CT
— 860-833 none assigned yet which blocks → METROPCS, INC. 5562 HARTFORD CT
— 860-835 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J ENFIELD CT
— 860-836 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
— 860-838 1XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
— 860-841 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
— 860-842 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 HARTFORD CT
— 860-843 0XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 SIMSBURY CT
— 860-844 3XXX6XXX7XXX9XXX · 3 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 SIMSBURY CT
— 860-845 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CT 639C BRISTOL CT
— 860-846 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CT 639C PLAINVILLE CT
— 860-847 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T - LOCAL 7421 WINDSOR CT
— 860-848 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NORWICH CT
— 860-851 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J STAFFD SPG CT
— 860-852 3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J MIDDLETOWN CT
— 860-853 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 OLD SAYBRK CT
— 860-854 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MIDDLETOWN CT
— 860-855 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CT 639C PLAINVILLE CT
— 860-857 none assigned yet which blocks → METROPCS, INC. 5562 NEW LONDON CT
— 860-858 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ROCKVILLE CT
— 860-859 none assigned yet which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NORWICH CT
— 860-861 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWICH CT
— 860-862 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NORWICH CT
— 860-863 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 SOUTHINGTN CT
— 860-864 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CT 639C STORRS CT
— 860-865 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW LONDON CT
— 860-866 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 TORRINGTON CT
— 860-868 4XXX5XXX8XXX · 2 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 WASHINGTON CT
— 860-870 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ROCKVILLE CT
— 860-871 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ROCKVILLE CT
— 860-872 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ROCKVILLE CT
— 860-873 0XXX4XXX · 2 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 MOODUS CT
— 860-874 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
— 860-875 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ROCKVILLE CT
— 860-876 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 OLD SAYBRK CT
— 860-877 6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOUTHINGTN CT
— 860-878 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-879 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 DEEP RIVER CT
— 860-881 0XXX1XXX2XXX · 2 holders which blocks → METROPCS, INC. 5562 HARTFORD CT
— 860-882 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J HARTFORD CT
— 860-883 none assigned yet which blocks → METROPCS, INC. 5562 HARTFORD CT
— 860-884 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWICH CT

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.