NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 509-896

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

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

The ten 1,000-number thousand-blocks inside prefix 509-896 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
UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 7
LEVEL 3 COMMUNICATIONS, LLC - WA 1
CHARTER IP ENABLED SERVICES, LLC 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
— 509-896-0XXX 0000–0999Reserved UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 MABTON WA
— 509-896-1XXX 1000–1999Reserved UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 MABTON WA
— 509-896-2XXX 2000–2999Reserved UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 MABTON WA
— 509-896-3XXX 3000–3999Reserved UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 MABTON WA
2006-08-23 509-896-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MABTON WA
— 509-896-5XXX 5000–5999Reserved UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 MABTON WA
2007-05-01 509-896-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MABTON WA
2014-12-23 509-896-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MABTON WA
— 509-896-8XXX 8000–8999Reserved UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 MABTON WA
— 509-896-9XXX 9000–9999Reserved UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA 4521 MABTON WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.