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 509
ONVOY, LLC - WA 66
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
2022-09-27 509-509 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WA 483E YAKIMA WA
2022-09-08 509-224 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E CHENEY WA
2022-07-01 509-652 0XXX2XXX3XXX4XXX5XXX which blocks → ONVOY, LLC - WA 483E SPRINGDALE WA
2021-02-01 509-918 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2020-12-21 509-513 1XXX2XXX7XXX · 2 holders which blocks → ONVOY, LLC - WA 483E NORTHPORT WA
2020-06-12 509-410 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WA 483E PASCO WA
2019-01-09 509-612 3XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - WA 483E KETTLE FLS WA
2015-09-25 509-960 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2015-09-16 509-600 0XXX1XXX2XXX3XXX6XXX · 3 holders which blocks → ONVOY, LLC - WA 483E BRIDGEPORT WA
2014-03-05 509-309 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2011-12-16 509-822 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2008-06-10 509-723 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2007-08-03 509-413 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2007-07-26 509-497 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WA 483E BENTONCITY WA
2006-03-09 509-385 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2001-12-11 509-204 4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E WALLAWALLA WA
2001-12-11 509-537 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E PASCO WA
2001-12-11 509-581 7XXX8XXX9XXX which blocks → ONVOY, LLC - WA 483E KENNEWICK WA
2001-12-11 509-940 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E RICHLAND WA
2001-12-11 509-955 7XXX8XXX9XXX which blocks → ONVOY, LLC - WA 483E YAKIMA WA
2001-11-07 509-871 6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - WA 483E OROVILLE WA
2001-10-29 509-620 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - WA 483E COULEE DAM WA
— 509-210 not yet reported which blocks → ONVOY, LLC - WA 483E LIBERTY LK WA
— 509-214 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - WA 483E NEWMANLAKE WA
— 509-231 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - WA 483E KENNEWICK WA
— 509-267 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-271 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-272 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-275 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-277 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-278 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-300 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E WENATCHEE WA
— 509-351 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-352 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-355 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-356 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-357 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-381 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-402 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E GRANDVIEW WA
— 509-420 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - WA 483E RICHLAND WA
— 509-461 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-463 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-471 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-472 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-479 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-561 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-562 not yet reported which blocks → ONVOY, LLC - WA 483E SPOKANE WA
— 509-640 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - WA 483E COLVILLE WA
— 509-642 0XXX1XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - WA 483E HARRAH WA
— 509-645 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WA 483E BREWSTER 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.