NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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, last 30 days — NPA 509
NEW CINGULAR WIRELESS PCS, LLC 1
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
2026-08-28 509-801 0XXX1XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2026-03-30 509-719 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WAPATO WA
2025-10-23 509-716 0XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 QUINCY WA
2025-08-29 509-709 0XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PASCO WA
2025-06-27 509-706 0XXX1XXX5XXX6XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2025-01-07 509-541 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2024-12-23 509-705 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ELLENSBURG WA
2024-11-26 509-938 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2024-11-18 509-704 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WALLAWALLA WA
2024-03-18 509-613 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2020-07-02 509-450 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2018-10-19 509-873 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2011-08-22 509-808 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2008-07-09 509-720 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2008-02-25 509-580 0XXX1XXX2XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SELAH WA
2004-09-20 509-215 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DAVENPORT WA
2004-08-13 509-207 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 REPUBLIC WA
2003-06-19 509-318 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CONNELL WA
2002-09-24 509-347 0XXX3XXX6XXX7XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RITZVILLE WA
2002-08-05 509-589 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWPORT WA
2002-07-23 509-551 7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KENNEWICK WA
2002-07-23 509-554 3XXX4XXX5XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RICHLAND WA
2002-06-14 509-240 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WALLAWALLA WA
2002-05-31 509-250 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GOLDENDALE WA
2002-05-31 509-637 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WH SALMON WA
2002-04-30 509-833 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2002-04-30 509-845 5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PASCO WA
2002-04-04 509-398 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2002-04-04 509-560 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OROVILLE WA
2002-03-25 509-237 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRATA WA
2001-12-14 509-260 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CLE ELUM WA
2001-12-05 509-362 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2001-01-30 509-216 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2001-01-30 509-217 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
2001-01-30 509-218 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-274 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SUNNYSIDE WA
— 509-280 7XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-290 5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-322 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OMAK WA
— 509-341 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TWISP WA
— 509-389 3XXX4XXX5XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-393 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WENATCHEE WA
— 509-419 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 COLVILLE WA
— 509-430 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PASCO WA
— 509-433 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WENATCHEE WA
— 509-470 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WENATCHEE WA
— 509-492 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PASCO WA
— 509-499 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPOKANE WA
— 509-521 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PASCO WA
— 509-528 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PASCO 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.