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
2004-11-09 773-829-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2004-10-26 773-512-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-26 773-512-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-26 773-512-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-26 773-512-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-21 773-366-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN10 IL
2004-10-19 773-822-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2004-10-19 773-822-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2004-10-15 773-241-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN07 IL
2004-10-15 773-249-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN11 IL
2004-10-15 773-295-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN05 IL
2004-10-15 773-336-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN09 IL
2004-10-15 773-362-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN08 IL
2004-10-15 773-366-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-10-15 773-366-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-10-15 773-366-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-10-15 773-366-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN10 IL
2004-10-15 773-494-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-15 773-494-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-15 773-512-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-15 773-512-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-15 773-512-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-15 773-537-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN04 IL
2004-10-15 773-584-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN06 IL
2004-10-15 773-751-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2004-10-13 773-382-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN09 IL
2004-10-13 773-733-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN06 IL
2004-10-08 773-663-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-08 773-663-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-08 773-663-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-30 773-326-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2004-09-30 773-366-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-09-30 773-414-6XXX 6000–6999Assigned METROPCS, INC. 5562 CHICGOZN03 IL
2004-09-30 773-414-7XXX 7000–7999Assigned METROPCS, INC. 5562 CHICGOZN03 IL
2004-09-30 773-414-8XXX 8000–8999Assigned METROPCS, INC. 5562 CHICGOZN03 IL
2004-09-30 773-499-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-30 773-499-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-403-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-499-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-499-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-29 773-499-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 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.