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
2006-10-26 773-853-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN03 IL
2006-10-24 773-891-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2006-10-23 773-951-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2006-10-13 773-679-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-10-13 773-679-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-10-13 773-679-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-10-13 773-679-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-10-11 773-966-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2006-10-11 773-966-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2006-10-11 773-966-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2006-10-11 773-966-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2006-10-10 773-250-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2006-10-10 773-273-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2006-10-10 773-279-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2006-10-10 773-303-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2006-10-10 773-313-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2006-10-10 773-360-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN04 IL
2006-10-10 773-364-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN09 IL
2006-10-10 773-435-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN04 IL
2006-10-10 773-572-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN04 IL
2006-10-10 773-634-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN04 IL
2006-10-10 773-799-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN04 IL
2006-10-10 773-877-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN03 IL
2006-10-06 773-853-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-10-06 773-853-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-10-06 773-853-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-10-06 773-853-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-10-06 773-853-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-10-06 773-853-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-10-06 773-853-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-09-29 773-966-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2006-09-29 773-966-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2006-09-15 773-516-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN02 IL
2006-09-15 773-654-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN02 IL
2006-09-15 773-681-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN02 IL
2006-09-15 773-808-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2006-09-15 773-808-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2006-09-11 773-364-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CHICGOZN09 IL
2006-09-11 773-364-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J CHICGOZN09 IL
2006-09-06 773-697-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2006-09-06 773-697-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2006-09-06 773-697-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2006-09-01 773-435-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN04 IL
2006-09-01 773-437-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN09 IL
2006-09-01 773-437-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN09 IL
2006-09-01 773-681-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN02 IL
2006-08-23 773-584-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN06 IL
2006-08-22 773-799-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2006-08-22 773-799-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2006-08-22 773-801-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN06 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.