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
2006-02-08 773-256-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2006-02-08 773-256-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2006-02-08 773-288-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2006-02-08 773-326-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2006-02-08 773-360-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN04 IL
2006-02-08 773-420-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2006-02-08 773-451-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2006-02-08 773-701-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHICGOZN10 IL
2006-02-08 773-701-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHICGOZN10 IL
2006-02-08 773-947-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2006-02-08 773-962-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2006-02-08 773-962-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2006-02-06 773-553-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2006-02-06 773-654-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2006-02-03 773-437-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN09 IL
2006-02-03 773-896-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN07 IL
2006-02-03 773-915-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN07 IL
2006-02-02 773-413-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN05 IL
2006-02-02 773-701-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN10 IL
2006-02-02 773-974-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN11 IL
2006-01-11 773-954-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-01-11 773-954-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-01-11 773-954-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-01-11 773-954-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-01-11 773-954-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2006-01-09 773-648-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2006-01-09 773-724-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2006-01-06 773-358-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN07 IL
2005-12-29 773-516-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2005-12-22 773-565-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2005-12-22 773-565-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2005-12-22 773-641-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-12-16 773-724-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-12-13 773-242-2XXX 2000–2999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN06 IL
2005-12-13 773-250-5XXX 5000–5999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN02 IL
2005-12-13 773-349-8XXX 8000–8999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN08 IL
2005-12-13 773-382-3XXX 3000–3999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN09 IL
2005-12-13 773-435-5XXX 5000–5999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN04 IL
2005-12-13 773-724-6XXX 6000–6999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN03 IL
2005-12-13 773-729-3XXX 3000–3999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN07 IL
2005-12-13 773-922-7XXX 7000–7999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN05 IL
2005-12-08 773-253-3XXX 3000–3999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN10 IL
2005-12-08 773-357-4XXX 4000–4999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN11 IL
2005-11-30 773-633-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-633-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-633-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-729-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-729-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-892-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-892-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 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.