NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 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 5
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
2017-03-21 224-322-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2017-03-21 224-529-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2017-03-15 224-428-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-877-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELK GROVE IL
2017-03-13 224-605-3XXX 3000–3999Assigned TELNYX LLC 073H ELGIN IL
2017-03-07 224-278-8XXX 8000–8999Assigned TELNYX LLC 073H ROSELLE IL
2017-03-07 224-287-8XXX 8000–8999Assigned TELNYX LLC 073H NORTHBROOK IL
2017-03-07 224-477-1XXX 1000–1999Assigned TELNYX LLC 073H DESPLAINES IL
2017-03-07 224-605-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2017-03-07 224-605-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2017-03-07 224-607-0XXX 0000–0999Assigned TELNYX LLC 073H ARLIGTNHTS IL
2017-02-22 224-762-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2017-02-17 224-857-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ARLIGTNHTS IL
2017-02-14 224-271-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LAKEFOREST IL
2017-01-30 224-517-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BARRINGTON IL
2017-01-26 224-754-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 HIGHLANDPK IL
2017-01-23 224-477-0XXX 0000–0999Assigned METROPCS, INC. 5562 DESPLAINES IL
2017-01-23 224-477-9XXX 9000–9999Assigned METROPCS, INC. 5562 DESPLAINES IL
2017-01-19 224-540-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ROUND LAKE IL
2017-01-19 224-540-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ROUND LAKE IL
2016-12-30 224-762-2XXX 2000–2999Assigned METROPCS, INC. 5562 ELGIN IL
2016-12-30 224-781-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J FRANKLINPK IL
2016-12-27 224-724-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 SKOKIE IL
2016-12-14 224-570-1XXX 1000–1999Assigned TELNYX LLC 073H WAUKEGAN IL
2016-12-13 224-605-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELGIN IL
2016-12-13 224-605-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ELGIN IL
2016-12-13 224-607-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-13 224-607-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-13 224-607-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-421-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-421-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-421-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-421-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-421-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-421-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-421-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-421-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-421-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-12-07 224-540-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ROUND LAKE IL
2016-12-07 224-540-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ROUND LAKE IL
2016-12-07 224-540-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ROUND LAKE IL
2016-12-07 224-551-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DEERFIELD IL
2016-12-07 224-551-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DEERFIELD IL
2016-12-07 224-551-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DEERFIELD IL
2016-12-07 224-551-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DEERFIELD 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.