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 563
MCC TELEPHONY OF IOWA, LLC - IA 42
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
2019-03-12 563-206-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F CLINTON IA
2018-10-19 563-200-9XXX 9000–9999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2018-06-20 563-232-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2018-06-15 563-227-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2018-02-20 563-200-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2017-10-12 563-232-6XXX 6000–6999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2017-08-14 563-207-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2017-06-07 563-949-4XXX 4000–4999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2017-02-27 563-214-5XXX 5000–5999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2016-09-23 563-239-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2016-06-23 563-232-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2015-08-11 563-888-5XXX 5000–5999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2014-10-17 563-231-3XXX 3000–3999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2013-11-26 563-888-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2012-08-21 563-559-2XXX 2000–2999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F CLINTON IA
2012-07-25 563-424-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2011-10-24 563-424-5XXX 5000–5999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2011-07-27 563-845-7XXX 7000–7999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2011-03-22 563-424-4XXX 4000–4999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2010-03-22 563-849-9XXX 9000–9999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F HESPER IA
2010-03-15 563-694-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F GOOSE LAKE IA
2010-03-15 563-934-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F MILES IA
2010-03-09 563-308-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F PRESTON IA
2010-03-09 563-729-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F LE CLAIRE IA
2010-03-05 563-220-9XXX 9000–9999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F SABULA IA
2010-03-05 563-221-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DE WITT IA
2010-03-05 563-522-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F LOW MOOR IA
2010-03-05 563-649-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F ATALISSA IA
2010-03-05 563-677-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F CHARLOTTE IA
2010-03-05 563-744-2XXX 2000–2999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F FARLEY IA
2010-03-05 563-785-2XXX 2000–2999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DURANT IA
2010-03-05 563-875-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DYERSVILLE IA
2010-03-05 563-876-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F EPWORTH IA
2010-03-05 563-886-5XXX 5000–5999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F TIPTON IA
2010-03-04 563-219-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F CLINTON IA
2010-03-04 563-223-9XXX 9000–9999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F ELDRIDGE IA
2010-03-04 563-284-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F WALCOTT IA
2010-03-04 563-486-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F OXFORD JCT IA
2010-03-04 563-748-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F MAQUOKETA IA
2010-03-04 563-845-0XXX 0000–0999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2010-02-16 563-424-2XXX 2000–2999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2005-01-11 563-321-4XXX 4000–4999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F CLINTON IA

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.