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
— 860-885 4XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NORWICH CT
— 860-886 none assigned yet which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NORWICH CT
— 860-887 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NORWICH CT
— 860-888 2XXX which blocks → METROPCS, INC. 5562 HARTFORD CT
— 860-889 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NORWICH CT
— 860-892 8XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NORWICH CT
— 860-893 3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NEWBRITAIN CT
— 860-894 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 MIDDLETOWN CT
— 860-895 0XXX2XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-896 5XXX7XXX8XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 ROCKVILLE CT
— 860-901 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WINDSORLKS CT
— 860-902 0XXX2XXX3XXX4XXX5XXX6XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WINDSOR CT
— 860-903 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WINDSORLKS CT
— 860-904 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HARTFORD CT
— 860-906 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HARTFORD CT
— 860-907 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WINDSOR CT
— 860-908 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWICH CT
— 860-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CT
— 860-912 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW LONDON CT
— 860-913 1XXX2XXX · 2 holders which blocks → METROPCS, INC. 5562 HARTFORD CT
— 860-915 4XXX5XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NEWMILFORD CT
— 860-916 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
— 860-918 7XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 GLASTONBY CT
— 860-919 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 SOUTHINGTN CT
— 860-920 2XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HARTFORD CT
— 860-921 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J TORRINGTON CT
— 860-922 none assigned yet which blocks → METROPCS, INC. 5562 HARTFORD CT
— 860-923 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 PUTNAM CT
— 860-925 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WINDSOR CT
— 860-926 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ROCKVILLE CT
— 860-927 8XXX9XXX · 2 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 KENT CT
— 860-928 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 PUTNAM CT
— 860-929 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J HARTFORD CT
— 860-930 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
— 860-932 0–9 XXXall 10 · 8 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 DANIELSON CT
— 860-935 1XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NOTHOMPSON CT
— 860-939 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 HARTFORD CT
— 860-940 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BRISTOL CT
— 860-941 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW LONDON CT
— 860-942 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WILLIMNTIC CT
— 860-943 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J OLD SAYBRK CT
— 860-944 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
— 860-945 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 WATERTOWN CT
— 860-946 0XXX3XXX4XXX7XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NEWMILFORD CT
— 860-947 4XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-948 0XXX8XXX9XXX · 2 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-950 not yet reported which blocks → CT
— 860-951 1XXX2XXX4XXX5XXX6XXX8XXX9XXX which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-952 2XXX3XXX4XXX9XXX · 2 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
— 860-953 not yet reported which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD 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.