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
2014-11-26 563-559-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CLINTON IA
2014-11-04 563-293-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2014-11-04 563-293-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DAVENPORT IA
2014-11-03 563-231-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DUBUQUE IA
2014-11-03 563-231-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DUBUQUE IA
2014-10-24 563-293-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2014-10-20 563-503-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLINTON IA
2014-10-17 563-231-3XXX 3000–3999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2014-10-13 563-202-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DECORAH IA
2014-10-13 563-316-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MUSCATINE IA
2014-10-13 563-519-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F CLINTON IA
2014-10-13 563-538-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F LANSING IA
2014-10-13 563-562-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F CALMAR IA
2014-10-03 563-929-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MANCHESTER IA
2014-09-18 563-549-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2014-09-12 563-213-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2014-09-11 563-886-8XXX 8000–8999Assigned CEDAR COMMUNICATIONS, LLC 4796 TIPTON IA
2014-09-10 563-549-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAVENPORT IA
2014-09-09 563-258-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBUQUE IA
2014-08-13 563-277-5XXX 5000–5999Assigned QWEST CORPORATION 9631 DECORAH IA
2014-08-12 563-949-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2014-08-08 563-293-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DAVENPORT IA
2014-08-06 563-316-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MUSCATINE IA
2014-08-01 563-231-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DUBUQUE IA
2014-06-17 563-316-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSCATINE IA
2014-06-16 563-293-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G DAVENPORT IA
2014-06-13 563-217-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WAUKON IA
2014-05-30 563-362-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DAVENPORT IA
2014-05-23 563-412-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 WEST UNION IA
2014-05-22 563-949-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2014-05-02 563-822-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 MANCHESTER IA
2014-04-21 563-316-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MUSCATINE IA
2014-04-21 563-459-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2014-04-01 563-723-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DAVENPORT IA
2014-03-31 563-221-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 DE WITT IA
2014-03-24 563-316-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MUSCATINE IA
2014-03-18 563-316-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MUSCATINE IA
2014-03-18 563-321-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLINTON IA
2014-03-18 563-726-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2014-03-07 563-293-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2014-03-07 563-293-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2014-02-25 563-231-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 DUBUQUE IA
2014-02-12 563-587-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2014-02-03 563-794-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 WAUKON IA
2013-12-27 563-412-0XXX 0000–0999Assigned AUREON COMMUNICATIONS, LLC 444G WEST UNION IA
2013-12-26 563-202-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DECORAH IA
2013-12-12 563-231-8XXX 8000–8999Assigned AUREON COMMUNICATIONS, LLC 444G DUBUQUE IA
2013-11-26 563-888-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2013-11-14 563-362-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J DAVENPORT IA
2013-11-13 563-657-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F WALCOTT 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.