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 781
VERIZON NEW ENGLAND INC. 232
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 92
PAETEC ITEL, LLC 69
LEVEL 3 COMMUNICATIONS, LLC - MA 59
TC SYSTEMS, INC. 57
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
2013-10-17 781-513 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LYNN MA
2013-10-17 781-805 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 RANDOLPH MA
2013-09-16 781-813 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 SAUGUS MA
2013-01-22 781-310 0–9 XXXwhole prefix which blocks → VERIZON NEW ENGLAND INC. 9102 DEDHAM MA
2012-06-19 781-206 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWELL MA
2012-05-23 781-666 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SAUGUS MA
2010-03-04 781-225 0–9 XXXwhole prefix which blocks → TC SYSTEMS, INC. 7135 LEXINGTON MA
2010-02-09 781-797 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E MARBLEHEAD MA
2008-03-18 781-816 0–9 XXXall 10 · 6 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 SAUGUS MA
2007-06-26 781-624 0–9 XXXwhole prefix which blocks → VERIZON NEW ENGLAND INC. 9102 WEYMOUTH MA
2006-09-14 781-733 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORWELL MA
2006-07-27 781-699 0–9 XXXwhole prefix which blocks → VERIZON NEW ENGLAND INC. 9102 WALTHAM MA
2005-10-26 781-633 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW ENGLAND INC. 9102 CANTON MA
2005-03-18 781-918 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. 7135 LEXINGTON MA
2004-09-02 781-214 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HULL MA
2003-09-29 781-212 not yet reported which blocks → NEP, LLC 174A WALTHAM MA
2002-10-30 781-901 none assigned yet which blocks → METROPCS, INC. 5562 WEYMOUTH MA
2002-10-28 781-540 0XXX2XXX3XXX4XXX5XXX6XXX7XXX which blocks → METROPCS, INC. 5562 NEEDHAM MA
2002-10-28 781-548 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → METROPCS, INC. 5562 WAKEFIELD MA
2002-10-28 781-568 2XXX3XXX4XXX5XXX6XXX which blocks → METROPCS, INC. 5562 STONEHAM MA
2002-10-28 781-570 2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 WINCHESTER MA
2002-10-28 781-576 1XXX3XXX4XXX · 2 holders which blocks → METROPCS, INC. 5562 MARBLEHEAD MA
2002-10-28 781-591 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 WELLESLEY MA
2002-10-25 781-201 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 SHARON MA
2002-10-25 781-204 2XXX6XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NORWELL MA
2002-10-25 781-252 2XXX which blocks → METROPCS, INC. 5562 WHITMAN MA
2002-10-25 781-351 4XXX5XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 ROCKLAND MA
2002-10-25 781-408 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 STOUGHTON MA
2002-10-25 781-414 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 NORWOOD MA
2002-10-25 781-470 1XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 SCITUATE MA
2002-10-25 781-500 none assigned yet which blocks → METROPCS, INC. 5562 MARSHFIELD MA
2002-10-25 781-510 4XXX5XXX7XXX8XXX · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 RANDOLPH MA
2002-10-25 781-520 4XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 SAUGUS MA
2002-10-21 781-264 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORWELL MA
2002-10-15 781-738 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWELL MA
2002-07-30 781-330 0XXX which blocks → METROPCS, INC. 5562 WALTHAM MA
2002-07-30 781-420 none assigned yet which blocks → METROPCS, INC. 5562 MALDEN MA
2002-07-30 781-866 5XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MEDFORD MA
2002-07-30 781-913 none assigned yet which blocks → METROPCS, INC. 5562 LYNN MA
2002-03-18 781-460 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WOBURN MA
2001-12-26 781-250 7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WALTHAM MA
2001-12-15 781-345 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BURLINGTON MA
2001-10-03 781-709 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HANOVER MA
2001-09-13 781-804 0XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J HINGHAM MA
2001-09-05 781-806 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J SHARON MA
2001-08-21 781-521 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J SAUGUS MA
2001-08-21 781-815 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J RANDOLPH MA
2001-08-21 781-879 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J LEXINGTON MA
2001-08-21 781-886 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J STOUGHTON MA
2001-08-19 781-903 1XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J HINGHAM MA

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.