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
2008-09-03 773-703-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2008-09-03 773-703-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2008-08-25 773-675-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2008-08-25 773-675-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2008-08-25 773-675-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2008-08-25 773-675-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2008-08-22 773-226-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2008-08-22 773-441-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-441-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-441-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-441-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-441-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-441-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-441-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-441-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-441-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-441-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2008-08-22 773-798-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2008-08-22 773-850-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2008-08-21 773-226-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2008-08-21 773-226-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2008-08-21 773-226-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2008-08-13 773-904-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN04 IL
2008-08-11 773-886-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2008-08-11 773-886-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2008-08-11 773-886-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2008-08-11 773-886-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2008-08-11 773-886-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2008-08-11 773-886-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2008-08-11 773-886-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2008-08-07 773-639-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CHICGOZN03 IL
2008-08-04 773-564-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2008-08-04 773-681-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2008-08-01 773-340-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2008-08-01 773-599-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2008-08-01 773-599-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2008-07-31 773-242-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2008-07-31 773-648-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2008-07-22 773-754-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2008-07-22 773-754-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2008-07-22 773-754-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2008-07-22 773-977-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2008-07-21 773-904-5XXX 5000–5999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN04 IL
2008-07-17 773-675-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN07 IL
2008-07-10 773-675-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2008-07-10 773-675-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2008-07-08 773-257-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN06 IL
2008-07-08 773-321-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN06 IL
2008-07-08 773-340-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN08 IL
2008-07-08 773-886-1XXX 1000–1999Assigned 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.