NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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
CENTURYLINK COMMUNICATIONS, LLC 124
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
2020-02-24 541-524-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BAKER OR
2018-06-18 541-263-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ENTERPRISE OR
2016-08-24 541-268-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MAPLETON OR
2016-08-08 541-581-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LOWELL OR
2016-01-22 541-666-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBANY OR
2016-01-12 541-360-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CORVALLIS OR
2015-05-11 541-304-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PENDLETON OR
2015-05-11 541-649-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COTTAGEGRV OR
2015-05-11 541-678-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BEND OR
2015-05-11 541-699-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J REDMOND OR
2015-05-11 541-810-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KLAMATHFLS OR
2015-05-11 541-841-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MEDFORD OR
2015-02-13 541-809-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILTONFWTR OR
2014-09-30 541-800-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STANFIELD OR
2014-09-04 541-204-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEABURG OR
2014-08-20 541-597-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SELMA OR
2014-08-18 541-866-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WOLF CREEK OR
2014-06-25 541-262-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OREGONSLOP OR
2014-06-25 541-293-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NYSSA OR
2014-06-25 541-473-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VALE OR
2014-03-24 541-466-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BROWNSVL OR
2014-03-24 541-491-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHEDD OR
2014-03-24 541-560-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PROSPECT OR
2014-03-24 541-594-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CRATERLAKE OR
2014-03-24 541-865-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BUTTEFALLS OR
2014-03-24 541-878-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHADY COVE OR
2014-03-24 541-949-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FISH LAKE OR
2014-03-18 541-648-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SILETZ OR
2014-03-18 541-846-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PROVOTMPHY OR
2014-03-17 541-209-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JEFFERSON OR
2014-03-17 541-264-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NEWPORT OR
2014-03-17 541-313-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OAKRIDGE OR
2014-03-17 541-439-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J POWERS OR
2014-03-17 541-644-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HARRISBURG OR
2014-03-17 541-692-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MALIN OR
2014-03-17 541-707-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J REEDSPORT OR
2014-03-17 541-802-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OAKLAND OR
2014-03-17 541-818-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SWEET HOME OR
2014-03-17 541-843-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JACKSONVL OR
2014-03-17 541-845-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MERRILL OR
2014-03-17 541-860-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MYRTLE CRK OR
2014-03-17 541-906-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PAISLEY OR
2014-03-17 541-909-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NO UMPQUA OR
2014-03-17 541-952-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JUNCTIONCY OR
2014-03-14 541-253-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PORTORFORD OR
2014-03-14 541-417-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LAKEVIEW OR
2014-03-14 541-425-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GOLD BEACH OR
2014-03-14 541-502-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GOLD HILL OR
2014-03-14 541-551-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BANDON OR
2014-03-14 541-559-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MYRTLE PT OR

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.