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
ONVOY, LLC - MA 20
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
2018-02-05 978-307 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MA 892D HAMILTON MA
2017-01-23 978-644 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MA 892D GEORGETOWN MA
2016-03-23 978-581 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MA 892D ORANGE MA
2016-03-03 978-966 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MA 892D DANVERS MA
2016-02-26 978-350 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MA 892D TEMPLETON MA
2016-01-04 978-797 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MA 892D ROCKPORT MA
2015-12-30 978-288 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MA 892D BEVERLY MA
2001-12-31 978-904 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MA 892D NEWBURYPT MA
— 978-285 1XXX9XXX · 2 holders which blocks → ONVOY, LLC - MA 892D PETERSHAM MA
— 978-506 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MA 892D LITTLETON MA
— 978-529 0XXX2XXX3XXX5XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - MA 892D BEVERLY MA
— 978-592 1XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - MA 892D BERLIN MA
— 978-704 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - MA 892D MANCHESTER MA
— 978-759 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MA 892D CONCORD MA
— 978-861 0XXX1XXX3XXX5XXX · 2 holders which blocks → ONVOY, LLC - MA 892D TOPSFIELD MA
— 978-883 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - MA 892D ASHBURNHAM MA
— 978-913 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - MA 892D ASHBY MA
— 978-915 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - MA 892D SALEM MA
— 978-917 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MA 892D SUDBURY MA
— 978-923 0XXX1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MA 892D WESTFORD 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.