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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2009-03-12 773-630-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-03-12 773-630-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-03-12 773-630-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-03-12 773-630-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-03-12 773-630-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-03-12 773-630-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2009-03-09 773-904-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2009-03-02 773-302-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2009-02-23 773-690-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2009-02-17 773-367-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-02-17 773-367-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-02-17 773-367-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-02-17 773-367-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-02-17 773-367-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-02-17 773-408-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2009-02-12 773-940-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2009-02-10 773-809-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-01-15 773-690-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN07 IL
2009-01-09 773-980-1XXX 1000–1999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 CHICGOZN10 IL
2008-12-16 773-809-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2008-12-16 773-809-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2008-12-16 773-809-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2008-11-17 773-940-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN06 IL
2008-11-17 773-940-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN06 IL
2008-11-17 773-940-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN06 IL
2008-11-14 773-257-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN06 IL
2008-11-14 773-273-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN02 IL
2008-11-14 773-299-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN06 IL
2008-11-14 773-336-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN09 IL
2008-11-14 773-359-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN09 IL
2008-11-14 773-359-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN09 IL
2008-11-14 773-359-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN09 IL
2008-11-14 773-413-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2008-11-14 773-413-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2008-11-14 773-417-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN05 IL
2008-11-14 773-417-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN05 IL
2008-11-14 773-442-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN02 IL
2008-11-14 773-451-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN07 IL
2008-11-14 773-542-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN06 IL
2008-11-14 773-570-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2008-11-14 773-769-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN02 IL
2008-11-14 773-789-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN08 IL
2008-11-14 773-789-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN08 IL
2008-11-14 773-789-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN08 IL
2008-11-14 773-828-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN02 IL
2008-11-14 773-904-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2008-11-14 773-904-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2008-11-14 773-969-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN04 IL
2008-11-14 773-980-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2008-11-14 773-980-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 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.