NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

16 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, last 30 days — NPA 563
ONVOY, LLC - IA 8
IMON COMMUNICATIONS, LLC - IA 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 3
NEW CINGULAR WIRELESS PCS, LLC - IL 1
LEVEL 3 COMMUNICATIONS, LLC - IA 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
2010-09-08 563-272-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MUSCATINE IA
2010-09-08 563-845-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DUBUQUE IA
2010-09-03 563-564-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DUBUQUE IA
2010-09-03 563-639-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DAVENPORT IA
2010-09-03 563-639-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DAVENPORT IA
2010-08-27 563-265-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2010-08-11 563-277-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DECORAH IA
2010-07-19 563-275-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2010-07-14 563-265-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2010-07-14 563-265-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2010-07-02 563-845-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2010-06-10 563-217-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WAUKON IA
2010-06-03 563-241-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CLINTON IA
2010-06-03 563-275-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2010-06-03 563-607-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MUSCATINE IA
2010-06-03 563-845-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DUBUQUE IA
2010-05-06 563-663-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DUBUQUE IA
2010-03-22 563-849-9XXX 9000–9999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F HESPER IA
2010-03-19 563-277-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K DECORAH IA
2010-03-19 563-412-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K WEST UNION IA
2010-03-17 563-203-8XXX 8000–8999Assigned MCC TELEPHONY LLC 593K CRESCO IA
2010-03-17 563-233-8XXX 8000–8999Assigned MCC TELEPHONY LLC 593K SUMNER IA
2010-03-17 563-237-0XXX 0000–0999Assigned MCC TELEPHONY LLC 593K FREDECKSBG IA
2010-03-17 563-425-8XXX 8000–8999Assigned MCC TELEPHONY LLC 593K FAYETTE IA
2010-03-17 563-566-8XXX 8000–8999Assigned MCC TELEPHONY LLC 593K LIME SPG IA
2010-03-17 563-569-0XXX 0000–0999Assigned MCC TELEPHONY LLC 593K PROTIVIN IA
2010-03-17 563-637-8XXX 8000–8999Assigned MCC TELEPHONY LLC 593K MAYNARD IA
2010-03-17 563-725-8XXX 8000–8999Assigned MCC TELEPHONY LLC 593K ELGIN IA
2010-03-17 563-928-0XXX 0000–0999Assigned MCC TELEPHONY LLC 593K EDGEWOOD IA
2010-03-17 563-933-0XXX 0000–0999Assigned MCC TELEPHONY LLC 593K STRAWBRYPT IA
2010-03-15 563-454-9XXX 9000–9999Assigned MCC TELEPHONY LLC 593K WYOMING IA
2010-03-15 563-562-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K CALMAR IA
2010-03-15 563-683-9XXX 9000–9999Assigned MCC TELEPHONY LLC 593K NEW ALBIN IA
2010-03-15 563-694-8XXX 8000–8999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F GOOSE LAKE IA
2010-03-15 563-764-9XXX 9000–9999Assigned MCC TELEPHONY LLC 593K OSSIAN 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
2010-03-09 563-607-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MUSCATINE IA
2010-03-09 563-729-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F LE CLAIRE IA
2010-03-09 563-748-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MAQUOKETA IA
2010-03-08 563-387-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DECORAH IA
2010-03-08 563-518-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 WEST UNION IA
2010-03-08 563-538-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 LANSING IA
2010-03-08 563-562-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CALMAR 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
2010-03-05 563-358-9XXX 9000–9999Assigned MCC TELEPHONY LLC 593K FTATKINSON 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

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.