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 978
VERIZON NEW ENGLAND INC. 221
PAETEC ITEL, LLC 90
LEVEL 3 COMMUNICATIONS, LLC - MA 86
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 71
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 59
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
2010-04-13 978-751 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 LEOMINSTER MA
2010-02-09 978-891 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2008-09-12 978-228 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HAVERHILL MA
2008-03-13 978-876 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 LAWRENCE MA
2008-01-28 978-673 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ORANGE MA
2007-08-23 978-676 0–9 XXXwhole prefix which blocks → VERIZON NEW ENGLAND INC. 9102 LAWRENCE MA
2006-07-20 978-914 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2006-02-07 978-616 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WINCHENDON MA
2006-02-07 978-707 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HARVARD MA
2005-12-12 978-701 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J LAWRENCE MA
2005-06-09 978-822 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SHIRLEY MA
2005-03-16 978-785 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J LUNENBURG MA
2004-11-17 978-496 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WESTFORD MA
2004-03-12 978-332 0–9 XXXall 10 · 3 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC 8468 LAWRENCE MA
2003-12-08 978-309 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J ROCKPORT MA
2003-09-29 978-217 not yet reported which blocks → NEP, LLC 174A SUDBURY MA
2003-01-08 978-953 2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TOPSFIELD MA
2002-10-28 978-408 0XXX2XXX3XXX4XXX5XXX7XXX · 2 holders which blocks → METROPCS, INC. 5562 BILLERICA MA
2002-10-28 978-413 none assigned yet which blocks → METROPCS, INC. 5562 WESTFORD MA
2002-10-28 978-417 none assigned yet which blocks → METROPCS, INC. 5562 NEWBURYPT MA
2002-10-28 978-471 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → METROPCS, INC. 5562 IPSWICH MA
2002-10-28 978-512 4XXX which blocks → METROPCS, INC. 5562 TYNGSBORO MA
2002-10-25 978-404 4XXX5XXX7XXX8XXX which blocks → METROPCS, INC. 5562 WILMINGTON MA
2002-10-21 978-257 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BARRE MA
2002-10-21 978-895 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 TEMPLETON MA
2002-09-18 978-875 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HUDSON MA
2002-09-18 978-877 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 GROTON MA
2002-08-28 978-844 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ACTON MA
2002-08-28 978-855 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FITCHBURG MA
2002-08-28 978-866 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2002-08-23 978-809 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANDOVER MA
2002-08-23 978-810 0XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BEVERLY MA
2002-08-15 978-833 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 LEOMINSTER MA
2002-08-15 978-836 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DANVERS MA
2002-08-06 978-886 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ANDOVER MA
2002-07-30 978-210 none assigned yet which blocks → METROPCS, INC. 5562 PEABODY MA
2002-07-30 978-476 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HAVERHILL MA
2002-07-30 978-726 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LOWELL MA
2002-07-09 978-760 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MAYNARD MA
2002-07-09 978-761 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LOWELL MA
2002-07-05 978-846 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTFORD MA
2002-06-04 978-798 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEOMINSTER MA
2002-05-31 978-460 5XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SUDBURY MA
2002-04-09 978-578 4XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BEVERLY MA
2002-03-08 978-270 4XXX5XXX6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWBURYPT MA
2002-03-08 978-500 4XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 IPSWICH MA
2002-03-08 978-766 1XXX2XXX3XXX4XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DANVERS MA
2002-02-27 978-735 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LOWELL MA
2002-02-19 978-906 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FITCHBURG MA
2002-02-13 978-290 4XXX5XXX6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 GLOUCESTER MA

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.