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
2004-12-29 773-540-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-12-27 773-322-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2004-12-20 773-433-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2004-12-20 773-433-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2004-12-20 773-433-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2004-12-20 773-827-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2004-12-20 773-827-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2004-12-17 773-516-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN02 IL
2004-12-16 773-290-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2004-12-16 773-503-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-12-16 773-503-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-12-16 773-503-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-12-16 773-503-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-12-16 773-503-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-12-16 773-503-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-12-16 773-503-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-12-16 773-503-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-12-15 773-726-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2004-12-15 773-726-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2004-12-15 773-726-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2004-12-15 773-896-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2004-12-15 773-896-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2004-12-15 773-896-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2004-12-13 773-494-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-12-13 773-494-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-12-13 773-494-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-12-06 773-494-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-12-03 773-290-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2004-12-03 773-503-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-12-03 773-524-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2004-12-03 773-822-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2004-12-01 773-829-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J CHICGOZN04 IL
2004-12-01 773-829-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CHICGOZN04 IL
2004-12-01 773-829-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J CHICGOZN04 IL
2004-11-30 773-494-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-11-29 773-364-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CHICGOZN09 IL
2004-11-29 773-364-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CHICGOZN09 IL
2004-11-29 773-364-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J CHICGOZN09 IL
2004-11-29 773-482-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CHICGOZN11 IL
2004-11-29 773-482-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CHICGOZN11 IL
2004-11-29 773-482-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CHICGOZN11 IL
2004-11-29 773-482-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J CHICGOZN11 IL
2004-11-29 773-822-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2004-11-29 773-829-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2004-11-18 773-503-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-11-11 773-341-5XXX 5000–5999Assigned ILLINOIS BELL TEL CO 9329 CHICGOZN10 IL
2004-11-11 773-494-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-11-11 773-512-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-11-10 773-309-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN05 IL
2004-11-09 773-822-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 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.