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
2001-05-08 978-584 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J BILLERICA MA
2001-05-08 978-586 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J BOLTON MA
2001-05-08 978-598 3XXX5XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CLINTON MA
2001-05-08 978-668 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J WESTMINSTR MA
2001-05-08 978-672 1XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J PRINCETON MA
2001-05-08 978-678 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J STERLING MA
2001-05-08 978-696 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J FITCHBURG MA
2001-05-08 978-727 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WESTFORD MA
2001-05-08 978-888 1XXX3XXX4XXX5XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J LOWELL MA
2001-05-03 978-253 0XXX4XXX which blocks → PAETEC ITEL, LLC 829J WILMINGTON MA
2001-05-03 978-490 1XXX2XXX3XXX · 3 holders which blocks → METROPCS, INC. 5562 WESTFORD MA
2001-05-01 978-360 none assigned yet which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HAVERHILL MA
2001-05-01 978-580 2XXX3XXX · 2 holders which blocks → METROPCS, INC. 5562 CONCORD MA
2001-04-24 978-505 2XXX3XXX4XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CONCORD MA
2001-04-24 978-764 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAWRENCE MA
2001-04-19 978-420 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J HAVERHILL MA
2001-04-11 978-938 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MAYNARD MA
2001-03-19 978-208 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J LAWRENCE MA
2001-03-19 978-212 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J HUDSON MA
2001-03-19 978-401 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LEOMINSTER MA
2001-03-19 978-495 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BILLERICA MA
2001-03-19 978-596 4XXX5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J LOWELL MA
2001-03-19 978-600 3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BILLERICA MA
2001-02-22 978-317 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PEABODY MA
2001-02-20 978-219 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SALEM MA
2001-02-20 978-289 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J ANDOVER MA
2001-02-20 978-387 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAWRENCE MA
2001-02-20 978-399 1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 WESTFORD MA
2001-02-20 978-715 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BILLERICA MA
2001-02-08 978-390 not yet reported which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LAWRENCE MA
2001-02-05 978-273 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
2001-01-16 978-225 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J NEWBURYPT MA
2001-01-09 978-517 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AMESBURY MA
2001-01-09 978-564 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DANVERS MA
2001-01-09 978-610 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONCORD MA
2001-01-08 978-344 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → PAETEC ITEL, LLC 829J MAYNARD MA
2001-01-08 978-709 1XXX2XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J ATHOL MA
— 978-201 7XXX8XXX which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
— 978-202 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CONCORD MA
— 978-203 0XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WILMINGTON MA
— 978-204 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAWRENCE MA
— 978-205 1XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E WILMINGTON MA
— 978-206 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ACTON MA
— 978-207 2XXX3XXX4XXX7XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NO READING MA
— 978-209 2XXX3XXX4XXX5XXX6XXX7XXX which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SUDBURY MA
— 978-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MA
— 978-213 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW ENGLAND INC. 9102 TOPSFIELD MA
— 978-214 not yet reported which blocks → VERIZON NEW ENGLAND INC. 9102 ANDOVER MA
— 978-215 not yet reported which blocks → PAETEC ITEL, LLC 829J BILLERICA MA
— 978-218 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → TC SYSTEMS, INC. 7135 SUDBURY 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.