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
2019-10-16 563-281-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 MUSCATINE IA
2019-10-16 563-292-8XXX 8000–8999Assigned AIRUS, INC - IA 423H WEST UNION IA
2019-09-23 563-278-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLINTON IA
2019-08-29 563-281-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F MUSCATINE IA
2019-08-29 563-281-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MUSCATINE IA
2019-08-27 563-276-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F WAUKON IA
2019-08-27 563-278-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F CLINTON IA
2019-08-27 563-278-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F CLINTON IA
2019-08-23 563-666-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F WALCOTT IA
2019-08-22 563-204-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F LANSING IA
2019-08-22 563-204-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F LANSING IA
2019-08-22 563-227-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2019-08-22 563-227-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2019-08-22 563-227-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2019-08-22 563-239-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2019-08-22 563-292-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F WEST UNION IA
2019-08-22 563-292-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F WEST UNION IA
2019-08-22 563-334-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DECORAH IA
2019-08-22 563-334-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F DECORAH IA
2019-08-22 563-396-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2019-08-22 563-396-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2019-08-22 563-526-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2019-08-22 563-526-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2019-08-22 563-526-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2019-08-22 563-661-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F MAQUOKETA IA
2019-08-22 563-661-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MAQUOKETA IA
2019-08-22 563-800-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F CALMAR IA
2019-08-07 563-204-1XXX 1000–1999Assigned TELNYX LLC 073H LANSING IA
2019-08-06 563-292-0XXX 0000–0999Assigned AIRUS, INC - IA 423H WEST UNION IA
2019-06-18 563-337-3XXX 3000–3999Assigned HAWKEYE INTERCONNECT COMPANY - IA 429J FAYETTE IA
2019-05-24 563-200-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2019-05-24 563-200-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DAVENPORT IA
2019-05-24 563-227-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2019-05-24 563-227-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DUBUQUE IA
2019-04-11 563-227-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 DUBUQUE IA
2019-03-19 563-521-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 MAQUOKETA IA
2019-03-12 563-206-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F CLINTON IA
2019-03-07 563-526-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DAVENPORT IA
2019-03-06 563-227-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DUBUQUE IA
2019-03-01 563-334-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 DECORAH IA
2019-01-24 563-526-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 DAVENPORT IA
2018-10-19 563-200-9XXX 9000–9999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DAVENPORT IA
2018-10-17 563-223-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELDRIDGE IA
2018-09-12 563-206-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 CLINTON IA
2018-08-29 563-261-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 MUSCATINE IA
2018-08-16 563-334-2XXX 2000–2999Assigned AIRUS, INC - IA 423H DECORAH IA
2018-08-10 563-221-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DE WITT IA
2018-07-27 563-313-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CRESCO IA
2018-07-27 563-313-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CRESCO IA
2018-07-27 563-313-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CRESCO 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.