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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2020-09-18 563-230-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DYERSVILLE IA
2020-09-18 563-655-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DE WITT IA
2020-09-18 563-921-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEW VIENNA IA
2020-09-16 563-356-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHESTER IA
2020-09-15 563-276-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F WAUKON IA
2020-09-15 563-276-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F WAUKON IA
2020-09-15 563-287-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DECORAH IA
2020-09-15 563-287-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F DECORAH IA
2020-09-10 563-220-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F SABULA IA
2020-09-10 563-230-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DYERSVILLE IA
2020-09-10 563-278-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F CLINTON IA
2020-09-10 563-278-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F CLINTON IA
2020-09-10 563-281-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F MUSCATINE IA
2020-09-10 563-281-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F MUSCATINE IA
2020-09-10 563-348-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2020-09-10 563-348-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2020-09-10 563-348-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2020-09-10 563-635-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F LE CLAIRE IA
2020-09-10 563-649-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F ATALISSA IA
2020-09-10 563-655-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H DE WITT IA
2020-09-10 563-655-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DE WITT IA
2020-09-10 563-655-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 DE WITT IA
2020-09-10 563-666-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F WALCOTT IA
2020-09-10 563-674-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F DELMAR IA
2020-09-10 563-677-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F CHARLOTTE IA
2020-09-10 563-724-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MOSCOW IA
2020-09-10 563-766-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F COLESBURG IA
2020-09-10 563-872-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F BELLEVUE IA
2020-09-10 563-872-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F BELLEVUE IA
2020-09-10 563-900-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2020-09-10 563-900-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2020-09-10 563-900-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2020-09-03 563-221-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 DE WITT IA
2020-09-03 563-292-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F WEST UNION IA
2020-09-03 563-292-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F WEST UNION IA
2020-09-03 563-600-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F LANSING IA
2020-09-03 563-600-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F LANSING IA
2020-09-03 563-822-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MANCHESTER IA
2020-09-03 563-922-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F DELHI IA
2020-09-03 563-925-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F GREELEY IA
2020-09-03 563-926-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F HOPKINTON IA
2020-09-03 563-932-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F RYAN IA
2020-08-28 563-348-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2020-08-12 563-297-3XXX 3000–3999Assigned HAWKEYE INTERCONNECT COMPANY - IA 429J ARLINGTON IA
2020-08-06 563-290-3XXX 3000–3999Assigned HAWKEYE INTERCONNECT COMPANY - IA 429J WAUCOMA IA
2020-07-31 563-238-6XXX 6000–6999Assigned HAWKEYE INTERCONNECT COMPANY - IA 429J LAWLER IA
2020-07-31 563-778-3XXX 3000–3999Assigned HAWKEYE INTERCONNECT COMPANY - IA 429J ST LUCAS IA
2020-07-23 563-296-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J DAVENPORT IA
2020-07-21 563-348-6XXX 6000–6999Assigned FRACTEL, LLC 965H DUBUQUE IA
2020-07-21 563-465-8XXX 8000–8999Assigned FRACTEL, LLC 965H FARLEY 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.