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
2016-06-23 563-232-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2016-06-21 563-794-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WAUKON IA
2016-06-03 563-214-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DAVENPORT IA
2016-06-03 563-232-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAVENPORT IA
2016-06-03 563-235-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBUQUE IA
2016-05-11 563-277-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DECORAH IA
2016-05-09 563-578-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G SUMNER IA
2016-05-06 563-770-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 MUSCATINE IA
2016-05-06 563-770-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 MUSCATINE IA
2016-04-05 563-204-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F LANSING IA
2016-04-05 563-204-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F LANSING IA
2016-04-05 563-770-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F MUSCATINE IA
2016-04-05 563-770-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F MUSCATINE IA
2016-03-22 563-235-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2016-03-22 563-499-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2016-03-22 563-499-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2016-03-22 563-514-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2016-03-22 563-770-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MUSCATINE IA
2016-03-17 563-652-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MAQUOKETA IA
2016-03-16 563-412-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F WEST UNION IA
2016-03-16 563-412-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F WEST UNION IA
2016-03-10 563-235-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2016-03-10 563-235-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2016-03-09 563-447-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F WALCOTT IA
2016-03-09 563-447-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F WALCOTT IA
2016-02-23 563-202-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F DECORAH IA
2016-02-23 563-202-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F DECORAH IA
2016-02-18 563-232-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 DAVENPORT IA
2016-02-18 563-794-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WAUKON IA
2016-02-16 563-217-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F WAUKON IA
2016-02-16 563-217-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F WAUKON IA
2016-02-16 563-503-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLINTON IA
2015-12-11 563-723-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2015-12-11 563-723-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2015-11-30 563-235-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBUQUE IA
2015-11-30 563-723-5XXX 5000–5999Assigned QWEST CORPORATION 9631 DAVENPORT IA
2015-11-30 563-723-6XXX 6000–6999Assigned QWEST CORPORATION 9631 DAVENPORT IA
2015-11-25 563-221-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 DE WITT IA
2015-11-25 563-777-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SABULA IA
2015-11-24 563-514-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DAVENPORT IA
2015-10-30 563-339-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 SUMNER IA
2015-10-20 563-224-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MAYNARD IA
2015-10-20 563-303-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 FAYETTE IA
2015-10-20 563-482-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LAWLER IA
2015-10-15 563-726-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2015-10-15 563-726-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2015-10-05 563-213-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBUQUE IA
2015-09-28 563-331-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 TIPTON IA
2015-09-23 563-412-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 WEST UNION IA
2015-09-23 563-513-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 DUBUQUE 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.