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
METROPCS, INC. 25
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
2016-09-06 978-962 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 LEOMINSTER MA
2011-10-19 978-320 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WESTFORD MA
2010-04-13 978-751 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 LEOMINSTER MA
2008-03-13 978-876 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 LAWRENCE MA
2002-10-28 978-408 0XXX2XXX3XXX4XXX5XXX7XXX · 2 holders which blocks → METROPCS, INC. 5562 BILLERICA MA
2002-10-28 978-413 none assigned yet which blocks → METROPCS, INC. 5562 WESTFORD MA
2002-10-28 978-417 none assigned yet which blocks → METROPCS, INC. 5562 NEWBURYPT MA
2002-10-28 978-471 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → METROPCS, INC. 5562 IPSWICH MA
2002-10-28 978-512 4XXX which blocks → METROPCS, INC. 5562 TYNGSBORO MA
2002-10-25 978-404 4XXX5XXX7XXX8XXX which blocks → METROPCS, INC. 5562 WILMINGTON MA
2002-08-15 978-833 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 LEOMINSTER MA
2002-07-30 978-210 none assigned yet which blocks → METROPCS, INC. 5562 PEABODY MA
2002-01-17 978-305 0XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 LAWRENCE MA
2001-05-03 978-490 1XXX2XXX3XXX · 3 holders which blocks → METROPCS, INC. 5562 WESTFORD MA
2001-05-01 978-580 2XXX3XXX · 2 holders which blocks → METROPCS, INC. 5562 CONCORD MA
— 978-230 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → METROPCS, INC. 5562 LEOMINSTER MA
— 978-473 7XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 BEVERLY MA
— 978-509 0XXX which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-590 none assigned yet which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-601 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-828 none assigned yet which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-853 none assigned yet which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-869 none assigned yet which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-884 none assigned yet which blocks → METROPCS, INC. 5562 LAWRENCE MA
— 978-985 none assigned yet which blocks → METROPCS, INC. 5562 LAWRENCE 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.