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
2021-12-03 563-338-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOPKINTON IA
2021-12-03 563-509-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LIME SPG IA
2021-11-24 563-224-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MAYNARD IA
2021-11-19 563-290-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUCOMA IA
2021-11-19 563-724-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MOSCOW IA
2021-11-19 563-774-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WADENA IA
2021-11-19 563-944-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOWDEN IA
2021-11-18 563-482-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAWLER IA
2021-11-15 563-294-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 WEST UNION IA
2021-10-29 563-278-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CLINTON IA
2021-10-29 563-477-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CLINTON IA
2021-10-20 563-253-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F TIPTON IA
2021-10-20 563-253-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F TIPTON IA
2021-10-05 563-279-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H DAVENPORT IA
2021-10-05 563-279-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H DAVENPORT IA
2021-10-05 563-279-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H DAVENPORT IA
2021-10-05 563-279-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H DAVENPORT IA
2021-10-05 563-281-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H MUSCATINE IA
2021-10-05 563-281-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H MUSCATINE IA
2021-10-05 563-294-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H WEST UNION IA
2021-10-05 563-477-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CLINTON IA
2021-10-05 563-477-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CLINTON IA
2021-10-05 563-521-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H MAQUOKETA IA
2021-10-05 563-521-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H MAQUOKETA IA
2021-09-30 563-224-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F MAYNARD IA
2021-09-30 563-238-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F LAWLER IA
2021-09-30 563-290-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F WAUCOMA IA
2021-09-30 563-315-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F STRAWBRYPT IA
2021-09-30 563-337-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F FAYETTE IA
2021-09-30 563-429-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F ALPHA IA
2021-09-30 563-569-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F PROTIVIN IA
2021-09-30 563-633-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F ARLINGTON IA
2021-09-30 563-767-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F VOLGA IA
2021-09-30 563-774-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F WADENA IA
2021-09-30 563-778-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F ST LUCAS IA
2021-09-30 563-924-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F LAMONT IA
2021-09-30 563-928-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F EDGEWOOD IA
2021-09-27 563-279-9XXX 9000–9999Assigned AIRUS, INC - IA 423H DAVENPORT IA
2021-09-24 563-237-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F FREDECKSBG IA
2021-09-17 563-626-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J HARPESFRRY IA
2021-08-27 563-578-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F SUMNER IA
2021-08-27 563-637-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MAYNARD IA
2021-08-25 563-400-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F CRESCO IA
2021-08-10 563-454-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WYOMING IA
2021-08-04 563-230-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F DYERSVILLE IA
2021-08-04 563-230-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F DYERSVILLE IA
2021-08-04 563-253-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F TIPTON IA
2021-08-04 563-253-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F TIPTON IA
2021-08-03 563-363-8XXX 8000–8999Assigned AUREON COMMUNICATIONS, LLC 444G MANCHESTER IA
2021-07-22 563-330-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONONA 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.