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
— 978-854 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PEABODY MA
— 978-856 5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LOWELL MA
— 978-857 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
— 978-858 6XXX7XXX8XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-859 none assigned yet which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E CONCORD MA
— 978-861 0XXX1XXX3XXX5XXX · 2 holders which blocks → ONVOY, LLC - MA 892D TOPSFIELD MA
— 978-862 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J AYER MA
— 978-863 8XXX which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-864 1XXX5XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 W NEWBURY MA
— 978-865 0XXX2XXX3XXX5XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 GLOUCESTER MA
— 978-867 0XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BEVERLY MA
— 978-869 none assigned yet which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-870 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J LEOMINSTER MA
— 978-874 3XXX4XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WESTMINSTR MA
— 978-878 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 FITCHBURG MA
— 978-879 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J GLOUCESTER MA
— 978-880 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DANVERS MA
— 978-881 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J ACTON MA
— 978-882 1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 DANVERS MA
— 978-883 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - MA 892D ASHBURNHAM MA
— 978-884 none assigned yet which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-887 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 TOPSFIELD MA
— 978-889 9XXX which blocks → TC SYSTEMS, INC. 7135 MAYNARD MA
— 978-897 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 MAYNARD MA
— 978-900 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 XXXXXXXXXX MA
— 978-901 0XXX4XXX6XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BILLERICA MA
— 978-902 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LAWRENCE MA
— 978-905 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LOWELL MA
— 978-907 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DANVERS MA
— 978-908 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
— 978-909 0XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WILMINGTON MA
— 978-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 978-912 0–9 XXXall 10 · 8 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HAVERHILL MA
— 978-913 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - MA 892D ASHBY MA
— 978-915 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - MA 892D SALEM MA
— 978-917 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MA 892D SUDBURY MA
— 978-918 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAWRENCE MA
— 978-919 0XXX2XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 GARDNER MA
— 978-920 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-921 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BEVERLY MA
— 978-922 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BEVERLY MA
— 978-923 0XXX1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MA 892D WESTFORD MA
— 978-924 4XXX6XXX8XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E WILMINGTON MA
— 978-926 1XXX3XXX4XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TYNGSBORO MA
— 978-927 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BEVERLY MA
— 978-928 0XXX2XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW ENGLAND INC. 9102 HUBBARDSTN MA
— 978-929 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ACTON MA
— 978-930 5XXX7XXX8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BILLERICA MA
— 978-931 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 XXXXXXXXXX MA
— 978-932 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BILLERICA 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.