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
— 978-220 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 XXXXXXXXXX MA
— 978-222 3XXX4XXX5XXX7XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NO READING MA
— 978-223 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J DANVERS MA
— 978-224 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALEM MA
— 978-226 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TC SYSTEMS, INC. 7135 TYNGSBORO MA
— 978-227 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. 7135 LEOMINSTER MA
— 978-229 0XXX1XXX5XXX6XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WILMINGTON MA
— 978-230 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → METROPCS, INC. 5562 LEOMINSTER MA
— 978-231 3XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GLOUCESTER MA
— 978-232 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BEVERLY MA
— 978-233 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HAMILTON MA
— 978-234 2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 GEORGETOWN MA
— 978-235 7XXX8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LEOMINSTER MA
— 978-236 0XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BEVERLY MA
— 978-237 1XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LAWRENCE MA
— 978-238 1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 IPSWICH MA
— 978-239 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PEABODY MA
— 978-240 not yet reported which blocks → NORFOLK COUNTY INTERNET, INC. 6083 HUDSON MA
— 978-241 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. 7135 HAVERHILL MA
— 978-242 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 LAWRENCE MA
— 978-244 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-245 9XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E CONCORD MA
— 978-246 3XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MAYNARD MA
— 978-247 0XXX which blocks → VERIZON NEW ENGLAND INC. 9102 ANDOVER MA
— 978-248 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → VERIZON NEW ENGLAND INC. 9102 ATHOL MA
— 978-249 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ATHOL MA
— 978-250 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-251 5XXX which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-252 1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ASHBURNHAM MA
— 978-254 1XXX5XXX6XXX7XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONCORD MA
— 978-255 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J NEWBURYPT MA
— 978-256 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-258 not yet reported which blocks → COMCAST IP PHONE, LLC 318J LAWRENCE MA
— 978-259 2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LOWELL MA
— 978-260 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 XXXXXXXXXX MA
— 978-261 0XXX1XXX2XXX3XXX5XXX7XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SUDBURY MA
— 978-262 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 BILLERICA MA
— 978-263 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ACTON MA
— 978-264 8XXX which blocks → VERIZON NEW ENGLAND INC. 9102 ACTON MA
— 978-265 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LOWELL MA
— 978-266 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ACTON MA
— 978-267 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E WILMINGTON MA
— 978-268 4XXX which blocks → PAETEC ITEL, LLC 829J ACTON MA
— 978-269 4XXX5XXX6XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J ANDOVER MA
— 978-272 1XXX6XXX7XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E GROTON MA
— 978-274 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ACTON MA
— 978-275 7XXX which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-276 4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 NO READING MA
— 978-277 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 TEMPLETON MA
— 978-278 3XXX5XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PEABODY 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.