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
Clear Download CSV ↓
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 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.