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
Clear Download CSV ↓
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 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.