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
2011-09-15 563-552-9XXX 9000–9999Assigned METROPCS, INC. 5562 DUBUQUE IA
2011-09-12 563-690-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 DUBUQUE IA
2011-09-12 563-886-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IA 6266 TIPTON IA
2011-08-31 563-639-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DAVENPORT IA
2011-08-16 563-241-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CLINTON IA
2011-08-11 563-929-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MANCHESTER IA
2011-08-10 563-424-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DAVENPORT IA
2011-08-03 563-275-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DAVENPORT IA
2011-07-27 563-845-7XXX 7000–7999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2011-07-26 563-265-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2011-07-18 563-459-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DAVENPORT IA
2011-07-13 563-275-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2011-07-13 563-451-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2011-06-29 563-259-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLINTON IA
2011-06-09 563-381-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DAVENPORT IA
2011-06-03 563-275-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2011-05-24 563-241-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLINTON IA
2011-05-24 563-552-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DUBUQUE IA
2011-05-24 563-552-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2011-05-24 563-554-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MUSCATINE IA
2011-05-05 563-275-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2011-04-28 563-639-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAVENPORT IA
2011-04-14 563-241-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CLINTON IA
2011-04-14 563-277-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DECORAH IA
2011-04-08 563-203-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CRESCO IA
2011-04-08 563-265-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2011-04-01 563-459-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DAVENPORT IA
2011-03-22 563-213-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DUBUQUE IA
2011-03-22 563-424-4XXX 4000–4999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2011-03-16 563-607-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSCATINE IA
2011-03-10 563-288-5XXX 5000–5999Assigned METROPCS, INC. 5562 MUSCATINE IA
2011-03-08 563-284-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WALCOTT IA
2011-02-22 563-265-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2011-02-17 563-213-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DUBUQUE IA
2011-02-17 563-265-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DAVENPORT IA
2011-02-16 563-241-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CLINTON IA
2011-02-16 563-594-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2011-01-10 563-424-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2011-01-06 563-213-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2011-01-06 563-424-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2010-12-17 563-321-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLINTON IA
2010-12-10 563-484-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J DAVENPORT IA
2010-11-24 563-275-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2010-11-10 563-265-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DAVENPORT IA
2010-11-02 563-265-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2010-11-02 563-845-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2010-10-22 563-639-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAVENPORT IA
2010-10-22 563-639-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAVENPORT IA
2010-10-11 563-845-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBUQUE IA
2010-09-08 563-219-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CLINTON 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.