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
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
2026-01-05 978-781 1XXX2XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2023-09-15 978-351 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2018-04-19 978-941 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2015-08-12 978-954 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2015-08-11 978-990 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LEOMINSTER MA
2015-06-04 978-971 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2015-02-03 978-802 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
2010-02-09 978-891 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2006-07-20 978-914 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2002-10-21 978-257 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BARRE MA
2002-10-21 978-895 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 TEMPLETON MA
2002-09-18 978-875 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HUDSON MA
2002-09-18 978-877 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 GROTON MA
2002-08-28 978-844 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ACTON MA
2002-08-28 978-855 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FITCHBURG MA
2002-08-28 978-866 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2002-08-06 978-886 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ANDOVER MA
2002-07-05 978-846 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTFORD MA
2002-05-31 978-460 5XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SUDBURY MA
2002-04-09 978-578 4XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BEVERLY MA
2002-03-08 978-270 4XXX5XXX6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWBURYPT MA
2002-03-08 978-500 4XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 IPSWICH MA
2002-03-08 978-766 1XXX2XXX3XXX4XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DANVERS MA
2002-02-13 978-290 4XXX5XXX6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 GLOUCESTER MA
2002-02-13 978-979 3XXX5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PEABODY MA
2002-02-13 978-994 5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2001-10-01 978-899 1XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LITTLETON MA
2001-09-13 978-604 2XXX3XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WILMINGTON MA
2001-09-05 978-868 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FITCHBURG MA
2001-07-27 978-400 1XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FITCHBURG MA
2001-07-20 978-434 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BARRE MA
2001-07-06 978-609 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
2001-06-15 978-793 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MAYNARD MA
2001-05-10 978-302 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 GROTON MA
2001-05-10 978-660 5XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LEOMINSTER MA
2001-05-09 978-501 6XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LITTLETON MA
2001-04-24 978-505 2XXX3XXX4XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CONCORD MA
2001-02-05 978-273 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
— 978-314 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
— 978-337 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
— 978-382 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
— 978-502 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FITCHBURG MA
— 978-618 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HUDSON MA
— 978-621 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ACTON MA
— 978-697 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
— 978-758 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
— 978-771 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LAWRENCE MA
— 978-773 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ANDOVER MA
— 978-799 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTFORD MA
— 978-806 1XXX5XXX6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ANDOVER 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.