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 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
2026-01-05 978-781 1XXX2XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2025-03-04 978-978 0–9 XXXwhole prefix which blocks → MASS MOBILE LLC 125L LOWELL MA
2023-09-15 978-351 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2023-05-25 978-200 0–9 XXXall 10 · 6 holders which blocks → FIVE9, INC. 598J LOWELL MA
2019-09-30 978-718 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → AIRUS, INC. - MA 428H ASHBURNHAM MA
2018-10-30 978-736 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LAWRENCE MA
2018-04-19 978-941 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2018-02-07 978-896 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PEABODY MA
2018-02-05 978-307 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MA 892D HAMILTON MA
2017-09-01 978-963 8XXX which blocks → VERIZON NEW ENGLAND INC. 9102 CONCORD MA
2017-07-11 978-916 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PEABODY MA
2017-03-22 978-949 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MANCHESTER MA
2017-01-23 978-644 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MA 892D GEORGETOWN MA
2016-12-28 978-690 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LAWRENCE MA
2016-12-27 978-892 0–9 XXXwhole prefix which blocks → VERIZON NEW ENGLAND INC. 9102 LAWRENCE MA
2016-10-04 978-871 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PEABODY MA
2016-09-22 978-643 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BARRE MA
2016-09-06 978-962 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 LEOMINSTER MA
2016-07-01 978-588 0–9 XXXall 10 · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 AYER MA
2016-04-19 978-438 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PEABODY MA
2016-03-23 978-581 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MA 892D ORANGE MA
2016-03-11 978-519 0–9 XXXall 10 · 5 holders which blocks → AIRUS, INC. - MA 428H HAVERHILL MA
2016-03-03 978-966 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MA 892D DANVERS MA
2016-02-26 978-350 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MA 892D TEMPLETON MA
2016-01-29 978-955 0–9 XXXall 10 · 5 holders which blocks → TC SYSTEMS, INC. 7135 LOWELL MA
2016-01-04 978-797 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MA 892D ROCKPORT MA
2015-12-30 978-288 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MA 892D BEVERLY MA
2015-08-12 978-954 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2015-08-11 978-990 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LEOMINSTER MA
2015-06-04 978-971 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2015-02-03 978-802 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
2014-10-15 978-972 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DANVERS MA
2014-08-11 978-872 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAVERHILL MA
2014-05-21 978-650 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K PEPPERELL MA
2014-04-18 978-813 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SHIRLEY MA
2013-11-03 978-428 9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AYER MA
2013-10-03 978-321 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINCHENDON MA
2013-10-03 978-419 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F TYNGSBORO MA
2013-10-03 978-708 0–9 XXXall 10 · 8 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F GROTON MA
2013-07-16 978-553 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HUDSON MA
2013-02-11 978-770 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J LOWELL MA
2012-11-19 978-999 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F ROCKPORT MA
2012-10-25 978-641 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HAVERHILL MA
2012-06-11 978-541 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 ATHOL MA
2011-10-19 978-320 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WESTFORD MA
2011-09-08 978-221 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LOWELL MA
2011-09-07 978-942 0–9 XXXall 10 · 4 holders which blocks → TC SYSTEMS, INC. 7135 LOWELL MA
2011-07-21 978-427 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LOWELL MA
2011-03-18 978-403 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E LUNENBURG MA
2010-09-30 978-830 0XXX1XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ATHOL 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.