Thousands-blocks in 509-284

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 509-284 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 509 blocks

Most active assignees, all time — NPA 509

ONVOY, LLC - WA 5

ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 2

LEVEL 3 COMMUNICATIONS, LLC - WA 1

ELTOPIA COMMUNICATIONS, LLC - WA 1

CENTURYLINK COMMUNICATIONS, 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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2017-08-31	509-284-0XXX	0000–0999	Assigned	ONVOY, LLC - WA	483E	TEKOA	WA
2021-06-01	509-284-1XXX	1000–1999	Assigned	ONVOY, LLC - WA	483E	TEKOA	WA
—	509-284-2XXX	2000–2999	Reserved	ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER	4324	TEKOA	WA
—	509-284-3XXX	3000–3999	Reserved	ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER	4324	TEKOA	WA
2004-06-04	509-284-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - WA	6121	TEKOA	WA
2008-05-29	509-284-5XXX	5000–5999	Assigned	ELTOPIA COMMUNICATIONS, LLC - WA	663D	TEKOA	WA
2017-09-26	509-284-6XXX	6000–6999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	TEKOA	WA
2007-03-23	509-284-7XXX	7000–7999	Assigned	ONVOY, LLC - WA	483E	TEKOA	WA
2020-06-17	509-284-8XXX	8000–8999	Assigned	ONVOY, LLC - WA	483E	TEKOA	WA
2020-06-17	509-284-9XXX	9000–9999	Assigned	ONVOY, LLC - WA	483E	TEKOA	WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.