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
2003-07-15 773-780-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-06-19 773-780-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-06-19 773-780-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-06-06 773-627-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-05-28 773-627-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-05-28 773-828-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2003-05-12 773-410-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2003-05-12 773-410-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2003-05-12 773-410-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2003-05-12 773-410-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2003-05-08 773-627-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-05-08 773-627-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-05-08 773-627-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-05-08 773-627-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-05-08 773-627-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-05-08 773-627-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-04-18 773-640-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2003-04-18 773-640-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2003-04-15 773-269-9XXX 9000–9999Assigned METROPCS, INC. 5562 CHICGOZN04 IL
2003-04-08 773-615-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2003-04-08 773-615-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2003-04-08 773-615-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2003-04-08 773-615-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2003-04-08 773-615-6XXX 6000–6999Assigned METROPCS, INC. 5562 CHICGOZN10 IL
2003-03-19 773-306-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-03-17 773-306-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-03-10 773-615-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2003-03-10 773-715-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2003-03-07 773-556-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2003-03-04 773-382-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN09 IL
2003-03-03 773-615-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2003-02-26 773-306-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-02-26 773-474-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2003-02-26 773-474-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2003-02-26 773-727-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2003-02-07 773-413-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN05 IL
2003-01-23 773-306-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-01-23 773-306-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2003-01-17 773-858-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2003-01-17 773-858-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2003-01-17 773-858-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2003-01-07 773-329-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2003-01-07 773-329-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2002-12-10 773-870-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2002-12-10 773-870-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2002-10-31 773-870-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2002-10-31 773-870-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2002-10-31 773-870-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2002-10-04 773-409-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2002-10-04 773-496-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN07 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.