NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
Clear Download CSV ↓
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 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.