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 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
2009-05-08 860-471 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
2008-10-23 860-578 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
2008-10-03 860-719 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HARTFORD CT
2008-10-03 860-840 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 HARTFORD CT
2008-10-03 860-890 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 HARTFORD CT
2008-10-01 860-772 0–9 XXXall 10 · 7 holders which blocks → IDT AMERICA, CORP. - CT 466E NEW LONDON CT
2008-06-18 860-899 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
2008-04-14 860-576 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WILLIMNTIC CT
2008-01-15 860-624 0–9 XXXwhole prefix which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 WINDSOR CT
2008-01-15 860-972 0–9 XXXwhole prefix which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
2007-07-02 860-353 0–9 XXXwhole prefix which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 HARTFORD CT
2007-06-05 860-905 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 WINDSOR CT
2006-11-22 860-580 0–9 XXXall 10 · 4 holders which blocks → SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 WINDSOR CT
2006-07-20 860-949 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWICH CT
2006-04-06 860-992 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
2006-04-05 860-970 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CT 639C HARTFORD CT
2006-03-17 860-971 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F STAFFD SPG CT
2005-07-21 860-898 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEWMILFORD CT
2004-12-14 860-477 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K STORRS CT
2004-09-10 860-762 not yet reported which blocks → AQUIS COMMUNICATIONS, INC. 6919 HARTFORD CT
2004-06-02 860-562 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 ENFIELD CT
2004-02-12 860-218 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J HARTFORD CT
2003-07-08 860-474 0–9 XXXall 10 · 7 holders which blocks → AT&T - LOCAL 7421 MANCHESTER CT
2002-11-04 860-501 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW LONDON CT
2002-10-22 860-287 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW LONDON CT
2002-10-22 860-324 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
2002-09-03 860-268 none assigned yet which blocks → METROPCS, INC. 5562 MANCHESTER CT
2002-09-03 860-538 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWBRITAIN CT
2002-08-01 860-209 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 HARTFORD CT
2002-07-17 860-597 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
2002-07-12 860-593 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
2002-05-30 860-759 5XXX6XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MIDDLETOWN CT
2002-05-30 860-839 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEWBRITAIN CT
2002-05-30 860-891 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MOODUS CT
2002-04-23 860-933 5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WILLIMNTIC CT
2002-04-23 860-966 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
2002-04-23 860-967 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2002-02-19 860-867 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW LONDON CT
2001-12-14 860-806 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARWINTON CT
2001-12-14 860-869 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 HARTFORD CT
2001-10-25 860-760 none assigned yet which blocks → PAETEC ITEL, LLC 829J HARTFORD CT
2001-10-25 860-805 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
2001-08-24 860-995 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 HARTFORD CT
2001-07-26 860-917 3XXX4XXX5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWICH CT
2001-07-02 860-965 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
2001-06-21 860-964 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 OLD SAYBRK CT
2001-05-01 860-328 2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 GLASTONBY CT
2001-05-01 860-834 4XXX5XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MIDDLETOWN CT
2001-05-01 860-849 2XXX4XXX5XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ENFIELD CT
2001-05-01 860-910 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW LONDON CT

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.