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
— 978-342 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 FITCHBURG MA
— 978-343 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 FITCHBURG MA
— 978-345 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 FITCHBURG MA
— 978-346 1XXX2XXX3XXX5XXX6XXX · 5 holders which blocks → VERIZON NEW ENGLAND INC. 9102 MERRIMAC MA
— 978-348 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 FITCHBURG MA
— 978-349 1XXX8XXX which blocks → PAETEC ITEL, LLC 829J LOWELL MA
— 978-352 0XXX1XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 GEORGETOWN MA
— 978-353 5XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 FITCHBURG MA
— 978-354 5XXX6XXX7XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 SALEM MA
— 978-355 1XXX7XXX8XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BARRE MA
— 978-356 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 IPSWICH MA
— 978-357 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NO READING MA
— 978-358 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TC SYSTEMS, INC. 7135 NEWBURYPT MA
— 978-359 1XXX4XXX7XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TOPSFIELD MA
— 978-361 1XXX5XXX6XXX7XXX · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HAVERHILL MA
— 978-362 0XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BILLERICA MA
— 978-363 0XXX3XXX6XXX9XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 W NEWBURY MA
— 978-364 1XXX5XXX6XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LOWELL MA
— 978-365 0XXX which blocks → VERIZON NEW ENGLAND INC. 9102 CLINTON MA
— 978-366 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 SUDBURY MA
— 978-367 6XXX which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-368 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 CLINTON MA
— 978-369 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CONCORD MA
— 978-370 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 NO READING MA
— 978-371 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CONCORD MA
— 978-372 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 HAVERHILL MA
— 978-373 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 HAVERHILL MA
— 978-374 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 HAVERHILL MA
— 978-375 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LOWELL MA
— 978-376 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAWRENCE MA
— 978-377 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HAVERHILL MA
— 978-378 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 AMESBURY MA
— 978-379 3XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAWRENCE MA
— 978-380 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J IPSWICH MA
— 978-381 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 GLOUCESTER MA
— 978-382 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
— 978-383 3XXX7XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TOWNSEND MA
— 978-384 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TC SYSTEMS, INC. 7135 MERRIMAC MA
— 978-385 not yet reported which blocks → NORFOLK COUNTY INTERNET, INC. 6083 HARVARD MA
— 978-386 1XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW ENGLAND INC. 9102 ASHBY MA
— 978-388 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 AMESBURY MA
— 978-389 3XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BERLIN MA
— 978-392 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 WESTFORD MA
— 978-393 1XXX5XXX6XXX7XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E ACTON MA
— 978-394 8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
— 978-395 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PEABODY MA
— 978-396 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NO READING MA
— 978-397 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LAWRENCE MA
— 978-398 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J LAWRENCE MA
— 978-402 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TC SYSTEMS, INC. 7135 CONCORD 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.