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 425
NEW CINGULAR WIRELESS PCS, LLC 44
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
2025-12-19 425-579 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2025-12-19 425-581 0XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERLAKE WA
2025-04-30 425-567 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2024-12-16 425-571 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2023-12-11 425-479 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2023-10-06 425-550 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2022-04-12 425-380 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2019-06-19 425-403 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2019-01-09 425-480 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2018-08-10 425-655 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2016-10-17 425-588 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-12-03 425-375 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2015-06-23 425-979 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2014-10-01 425-236 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2012-10-24 425-324 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2012-01-24 425-628 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-08-17 425-615 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-06-03 425-505 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2008-07-10 425-449 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2007-11-12 425-516 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2001-08-15 425-301 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2001-07-25 425-320 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2001-03-26 425-306 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2001-03-20 425-919 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
— 425-210 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-220 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-239 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-241 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-281 3XXX4XXX5XXX7XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
— 425-299 3XXX4XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-314 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-381 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
— 425-387 2XXX3XXX4XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-418 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-501 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-503 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-530 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-753 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-785 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-802 4XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-879 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
— 425-894 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-922 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
— 425-985 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA

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.