NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2006-06-13 773-765-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2006-06-07 773-565-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN06 IL
2006-06-07 773-654-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN02 IL
2006-06-07 773-799-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN04 IL
2006-06-07 773-855-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2006-06-06 773-574-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-06-06 773-574-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-06-06 773-574-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-06-06 773-574-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-06-06 773-574-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-06-05 773-855-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN07 IL
2006-05-23 773-225-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-05-23 773-225-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-05-23 773-225-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-05-23 773-225-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-05-22 773-293-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN02 IL
2006-05-22 773-293-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN02 IL
2006-05-22 773-360-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2006-05-22 773-697-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2006-05-22 773-801-2XXX 2000–2999Assigned ILLINOIS BELL TEL CO 9329 CHICGOZN06 IL
2006-05-19 773-524-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2006-05-19 773-799-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2006-05-19 773-799-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2006-05-19 773-899-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-05-19 773-899-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-05-16 773-596-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2006-05-16 773-596-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2006-05-11 773-322-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2006-05-08 773-249-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN11 IL
2006-05-04 773-823-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2006-04-19 773-822-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2006-04-17 773-360-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN04 IL
2006-04-17 773-546-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN10 IL
2006-04-17 773-696-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2006-04-14 773-290-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2006-04-14 773-977-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2006-04-12 773-899-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2006-04-12 773-899-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2006-04-12 773-899-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2006-04-11 773-516-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2006-04-11 773-605-0XXX 0000–0999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2006-04-11 773-605-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2006-04-11 773-605-2XXX 2000–2999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2006-04-11 773-605-3XXX 3000–3999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2006-04-11 773-605-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2006-04-11 773-605-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2006-04-11 773-605-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2006-04-11 773-605-7XXX 7000–7999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2006-04-11 773-605-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL
2006-04-11 773-605-9XXX 9000–9999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN02 IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.