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
— 978-587 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 PEABODY MA
— 978-589 2XXX7XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WESTFORD MA
— 978-590 none assigned yet which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-591 5XXX6XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E CONCORD MA
— 978-592 1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - MA 892D BERLIN MA
— 978-593 1XXX5XXX6XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E ATHOLFKLN MA
— 978-594 2XXX3XXX6XXX7XXX8XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J SALEM MA
— 978-595 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 PEABODY MA
— 978-597 4XXX7XXX9XXX · 3 holders which blocks → VERIZON NEW ENGLAND INC. 9102 TOWNSEND MA
— 978-599 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J SALEM MA
— 978-601 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-602 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J FITCHBURG MA
— 978-605 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J DANVERS MA
— 978-606 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LOWELL MA
— 978-608 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BILLERICA MA
— 978-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 978-612 5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CLINTON MA
— 978-613 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 PETERSHAM MA
— 978-614 0XXX5XXX · 2 holders which blocks → TC SYSTEMS, INC. 7135 LOWELL MA
— 978-615 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 AYER MA
— 978-618 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HUDSON MA
— 978-619 7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J SALEM MA
— 978-620 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J LAWRENCE MA
— 978-621 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ACTON MA
— 978-622 2XXX5XXX6XXX7XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E BILLERICA MA
— 978-623 4XXX which blocks → VERIZON NEW ENGLAND INC. 9102 ANDOVER MA
— 978-624 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J DANVERS MA
— 978-625 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 BILLERICA MA
— 978-626 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HAMILTON MA
— 978-628 not yet reported which blocks → NORFOLK COUNTY INTERNET, INC. 6083 TEMPLETON MA
— 978-629 2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E BILLERICA MA
— 978-630 7XXX which blocks → VERIZON NEW ENGLAND INC. 9102 GARDNER MA
— 978-631 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ACTON MA
— 978-632 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 GARDNER MA
— 978-633 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ORANGE MA
— 978-634 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BOLTON MA
— 978-635 2XXX4XXX6XXX · 2 holders which blocks → VERIZON NEW ENGLAND INC. 9102 ACTON MA
— 978-636 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BARRE MA
— 978-637 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → AT&T - LOCAL 7421 MAYNARD MA
— 978-638 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 CONCORD MA
— 978-639 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SUDBURY MA
— 978-640 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 LOWELL MA
— 978-642 1XXX3XXX4XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WILMINGTON MA
— 978-645 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. 7135 LAWRENCE MA
— 978-646 7XXX which blocks → VERIZON NEW ENGLAND INC. 9102 DANVERS MA
— 978-647 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J TOPSFIELD MA
— 978-648 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J MAYNARD MA
— 978-649 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 TYNGSBORO MA
— 978-651 1XXX9XXX which blocks → PAETEC ITEL, LLC 829J LAWRENCE MA
— 978-653 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HAMILTON 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.