NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 541
ZIPLY FIBER, LLC 12
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
2012-04-09 541-562-4XXX 4000–4999Assigned ZIPLY FIBER, LLC 0760 UNION OR
2012-02-28 541-794-9XXX 9000–9999Assigned ZIPLY FIBER, LLC 0760 NO POWDER OR
2012-02-24 541-534-8XXX 8000–8999Assigned ZIPLY FIBER, LLC 0760 IMBLER OR
2012-02-24 541-568-0XXX 0000–0999Assigned ZIPLY FIBER, LLC 0760 COVE OR
2012-02-24 541-569-8XXX 8000–8999Assigned ZIPLY FIBER, LLC 0760 LOSTINE OR
2012-02-24 541-577-9XXX 9000–9999Assigned ZIPLY FIBER, LLC 0760 JOSEPH OR
2012-02-24 541-886-9XXX 9000–9999Assigned ZIPLY FIBER, LLC 0760 WALLOWA OR
2012-02-24 541-960-1XXX 1000–1999Assigned ZIPLY FIBER, LLC 0760 ELGIN OR
2004-01-26 541-406-4XXX 4000–4999Assigned ZIPLY FIBER, LLC 0760 BAKER OR
2003-01-23 541-612-9XXX 9000–9999Assigned ZIPLY FIBER, LLC 0760 PENDLETON OR
2003-01-14 541-667-1XXX 1000–1999Assigned ZIPLY FIBER, LLC 0760 HERMISTON OR
2002-06-10 541-426-7XXX 7000–7999Assigned ZIPLY FIBER, LLC 0760 ENTERPRISE OR

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.