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
— 978-279 1XXX9XXX which blocks → PAETEC ITEL, LLC 829J BEVERLY MA
— 978-280 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CONCORD MA
— 978-281 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 GLOUCESTER MA
— 978-282 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 GLOUCESTER MA
— 978-283 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 GLOUCESTER MA
— 978-284 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WILMINGTON MA
— 978-285 1XXX9XXX · 2 holders which blocks → ONVOY, LLC - MA 892D PETERSHAM MA
— 978-287 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CONCORD MA
— 978-291 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J LAWRENCE MA
— 978-292 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LAWRENCE MA
— 978-293 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HUDSON MA
— 978-294 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BILLERICA MA
— 978-295 1XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SUDBURY MA
— 978-296 3XXX4XXX5XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J ANDOVER MA
— 978-297 6XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WINCHENDON MA
— 978-298 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MAYNARD MA
— 978-299 5XXX6XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEVERLY MA
— 978-301 0XXX3XXX4XXX6XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 PETERSHAM MA
— 978-303 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WESTFORD MA
— 978-304 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J DANVERS MA
— 978-306 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J SALEM MA
— 978-308 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J W NEWBURY MA
— 978-310 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. 7135 HUDSON MA
— 978-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 978-312 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J IPSWICH MA
— 978-313 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 BILLERICA MA
— 978-314 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
— 978-315 1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WILMINGTON MA
— 978-316 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 CONCORD MA
— 978-318 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 CONCORD MA
— 978-319 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LOWELL MA
— 978-322 0XXX which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-323 1XXX9XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-324 not yet reported which blocks → NORFOLK COUNTY INTERNET, INC. 6083 ORANGE MA
— 978-325 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GLOUCESTER MA
— 978-326 7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 PEABODY MA
— 978-327 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J LAWRENCE MA
— 978-328 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 LOWELL MA
— 978-329 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LAWRENCE MA
— 978-330 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BILLERICA MA
— 978-331 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MAYNARD MA
— 978-333 5XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HUDSON MA
— 978-334 1XXX4XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GARDNER MA
— 978-335 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DANVERS MA
— 978-336 none assigned yet which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALEM MA
— 978-337 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
— 978-338 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEVERLY MA
— 978-339 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LITTLETON MA
— 978-340 none assigned yet which blocks → VERIZON NEW ENGLAND INC. 9102 FITCHBURG MA
— 978-341 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → TERRA NOVA TELECOM INC. 145J 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.