NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 773
ONVOY, 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
2009-09-29 773-312-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2009-09-29 773-312-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2009-09-29 773-312-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2009-09-29 773-690-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2009-09-29 773-690-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2009-09-29 773-690-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2009-08-11 773-554-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-11 773-554-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-11 773-554-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-11 773-554-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-07 773-367-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-07 773-372-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-07 773-372-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-07 773-372-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-07 773-372-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-07 773-639-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-08-07 773-683-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-07-10 773-766-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-07-10 773-766-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-07-10 773-766-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-07-10 773-766-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-07-10 773-766-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-07-10 773-809-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-07-10 773-809-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-07-10 773-809-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-07-02 773-302-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2009-07-02 773-302-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2009-07-01 773-982-3XXX 3000–3999Assigned ILLINOIS BELL TEL CO 9329 CHICGOZN10 IL
2009-06-30 773-800-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2009-06-25 773-367-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-06-25 773-367-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-06-25 773-367-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-06-25 773-367-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-06-25 773-408-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2009-06-25 773-408-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2009-06-19 773-922-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN05 IL
2009-06-12 773-997-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2009-06-12 773-997-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2009-06-08 773-690-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2009-06-08 773-690-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2009-06-05 773-270-7XXX 7000–7999Assigned METROPCS, INC. 5562 CHICGOZN04 IL
2009-05-18 773-584-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2009-05-18 773-584-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2009-05-18 773-648-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2009-05-18 773-901-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2009-05-18 773-970-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2009-05-18 773-970-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2009-05-18 773-970-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2009-05-18 773-970-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2009-05-18 773-998-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 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.