NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 360-398

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 360-398 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 360 blocks

Most active assignees, all time — NPA 360
ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 6
NEW CINGULAR WIRELESS PCS, LLC 1
ELTOPIA COMMUNICATIONS, LLC - WA 1
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 1
ASTOUND BROADBAND, LLC - WA 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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
— 360-398-0XXX 0000–0999Reserved ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 WHATCOMCTY WA
— 360-398-1XXX 1000–1999Reserved ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 WHATCOMCTY WA
— 360-398-2XXX 2000–2999Reserved ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 WHATCOMCTY WA
2010-05-03 360-398-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WHATCOMCTY WA
2009-03-18 360-398-4XXX 4000–4999Assigned ELTOPIA COMMUNICATIONS, LLC - WA 663D WHATCOMCTY WA
2009-09-09 360-398-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 WHATCOMCTY WA
2009-06-19 360-398-6XXX 6000–6999Assigned ASTOUND BROADBAND, LLC - WA 937F WHATCOMCTY WA
— 360-398-7XXX 7000–7999Reserved ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 WHATCOMCTY WA
— 360-398-8XXX 8000–8999Reserved ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 WHATCOMCTY WA
— 360-398-9XXX 9000–9999Reserved ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4423 WHATCOMCTY 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.