NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

16 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2010-03-05 563-744-2XXX 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
2010-03-05 563-845-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE 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
2010-02-16 563-822-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K MANCHESTER IA
2010-02-12 563-447-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WALCOTT IA
2010-02-12 563-484-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2010-02-08 563-272-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MUSCATINE IA
2010-02-08 563-321-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLINTON IA
2010-02-08 563-723-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2010-02-08 563-723-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2010-01-14 563-275-1XXX 1000–1999Assigned WINDSTREAM IT-COMM, LLC - IA 938D DAVENPORT IA
2009-12-08 563-549-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 DAVENPORT IA
2009-11-24 563-265-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DAVENPORT IA
2009-11-20 563-587-8XXX 8000–8999Assigned CS TECHNOLOGIES, INC. - IA 204A DUBUQUE IA
2009-10-26 563-217-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 WAUKON IA
2009-09-04 563-554-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MUSCATINE IA
2009-09-04 563-726-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2009-08-27 563-484-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J DAVENPORT IA
2009-08-07 563-321-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLINTON IA
2009-06-09 563-213-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2009-06-08 563-726-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2009-04-13 563-845-5XXX 5000–5999Assigned AT&T - LOCAL 7421 DUBUQUE IA
2009-02-17 563-663-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBUQUE IA
2009-02-05 563-726-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2009-01-08 563-329-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 MCGREGOR IA
2009-01-06 563-381-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAVENPORT IA
2009-01-06 563-794-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 WAUKON IA
2008-12-16 563-564-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2008-11-07 563-468-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2008-10-30 563-223-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ELDRIDGE IA
2008-10-30 563-289-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E LE CLAIRE IA
2008-10-30 563-447-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WALCOTT IA
2008-10-03 563-209-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAVENPORT IA
2008-09-09 563-639-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAVENPORT IA
2008-09-08 563-449-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2008-08-27 563-209-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DAVENPORT IA
2008-08-22 563-518-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F WEST UNION IA
2008-08-14 563-613-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOW MOOR IA
2008-08-05 563-284-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F WALCOTT IA
2008-08-05 563-538-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F LANSING IA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.