NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

22 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 224
NEW CINGULAR WIRELESS PCS, LLC - IL 11
ONVOY, LLC 6
VERSATEL LLC 1
INTRADO COMMUNICATIONS, LLC 1
EXIANT COMMUNICATIONS LLC 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
2021-10-11 224-431-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-10-11 224-431-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-10-11 224-431-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-10-11 224-431-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-10-11 224-431-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-10-11 224-431-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-10-07 224-370-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DESPLAINES IL
2021-10-07 224-447-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2021-10-07 224-447-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2021-10-07 224-447-9XXX 9000–9999Assigned METROPCS, INC. 5562 WAUKEGAN IL
2021-10-07 224-449-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2021-10-07 224-809-9XXX 9000–9999Assigned METROPCS, INC. 5562 DESPLAINES IL
2021-10-06 224-416-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2021-09-28 224-512-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J BARRINGTON IL
2021-09-24 224-449-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2021-09-23 224-429-0XXX 0000–0999Assigned COMMIO, LLC 939H GRAYSLAKE IL
2021-09-23 224-429-1XXX 1000–1999Assigned COMMIO, LLC 939H GRAYSLAKE IL
2021-09-23 224-429-2XXX 2000–2999Assigned COMMIO, LLC 939H GRAYSLAKE IL
2021-09-22 224-418-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELK GROVE IL
2021-09-22 224-418-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELK GROVE IL
2021-09-22 224-418-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELK GROVE IL
2021-09-22 224-449-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELGIN IL
2021-09-22 224-449-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELGIN IL
2021-09-22 224-449-9XXX 9000–9999Assigned METROPCS, INC. 5562 ELGIN IL
2021-09-20 224-340-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DESPLAINES IL
2021-09-20 224-550-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELK GROVE IL
2021-09-20 224-550-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ELK GROVE IL
2021-09-20 224-563-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DESPLAINES IL
2021-09-17 224-376-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOX LAKE IL
2021-09-14 224-367-4XXX 4000–4999Assigned COMMIO, LLC 939H DUNDEE IL
2021-09-14 224-367-5XXX 5000–5999Assigned COMMIO, LLC 939H DUNDEE IL
2021-09-14 224-394-0XXX 0000–0999Assigned COMMIO, LLC 939H BARTLETT IL
2021-09-14 224-394-1XXX 1000–1999Assigned COMMIO, LLC 939H BARTLETT IL
2021-09-14 224-394-2XXX 2000–2999Assigned COMMIO, LLC 939H BARTLETT IL
2021-09-14 224-394-3XXX 3000–3999Assigned COMMIO, LLC 939H BARTLETT IL
2021-09-14 224-394-8XXX 8000–8999Assigned COMMIO, LLC 939H BARTLETT IL
2021-09-14 224-397-2XXX 2000–2999Assigned COMMIO, LLC 939H ALGONQUIN IL
2021-09-14 224-397-3XXX 3000–3999Assigned COMMIO, LLC 939H ALGONQUIN IL
2021-09-14 224-397-4XXX 4000–4999Assigned COMMIO, LLC 939H ALGONQUIN IL
2021-09-14 224-397-5XXX 5000–5999Assigned COMMIO, LLC 939H ALGONQUIN IL
2021-09-14 224-417-0XXX 0000–0999Assigned COMMIO, LLC 939H EVANSTON IL
2021-09-14 224-417-1XXX 1000–1999Assigned COMMIO, LLC 939H EVANSTON IL
2021-09-14 224-417-2XXX 2000–2999Assigned COMMIO, LLC 939H EVANSTON IL
2021-09-14 224-417-3XXX 3000–3999Assigned COMMIO, LLC 939H EVANSTON IL
2021-09-14 224-452-1XXX 1000–1999Assigned COMMIO, LLC 939H PALATINE IL
2021-09-14 224-452-7XXX 7000–7999Assigned COMMIO, LLC 939H PALATINE IL
2021-09-14 224-452-8XXX 8000–8999Assigned COMMIO, LLC 939H PALATINE IL
2021-09-14 224-452-9XXX 9000–9999Assigned COMMIO, LLC 939H PALATINE IL
2021-09-14 224-550-6XXX 6000–6999Assigned COMMIO, LLC 939H ELK GROVE IL
2021-09-14 224-550-7XXX 7000–7999Assigned COMMIO, LLC 939H ELK GROVE IL

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.