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
2011-12-29 773-669-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2011-12-29 773-669-9XXX 9000–9999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2011-12-28 773-941-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN10 IL
2011-12-14 773-904-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN04 IL
2011-11-14 773-688-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2011-11-14 773-688-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2011-11-14 773-688-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2011-11-14 773-796-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN02 IL
2011-11-02 773-666-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN04 IL
2011-09-29 773-231-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2011-09-29 773-231-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2011-09-26 773-484-2XXX 2000–2999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN07 IL
2011-09-26 773-484-4XXX 4000–4999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN07 IL
2011-09-21 773-796-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2011-09-21 773-796-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2011-09-15 773-231-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN07 IL
2011-08-31 773-377-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN11 IL
2011-08-31 773-696-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN06 IL
2011-08-30 773-993-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN03 IL
2011-08-25 773-492-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN08 IL
2011-08-25 773-492-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN08 IL
2011-08-19 773-688-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2011-08-19 773-688-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2011-08-19 773-788-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN08 IL
2011-08-19 773-982-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2011-08-19 773-982-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2011-08-16 773-366-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN10 IL
2011-08-15 773-796-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN02 IL
2011-08-15 773-993-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN03 IL
2011-08-08 773-688-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN05 IL
2011-07-27 773-242-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN06 IL
2011-07-27 773-242-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN06 IL
2011-07-20 773-780-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2011-07-14 773-644-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2011-07-14 773-739-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2011-07-14 773-739-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2011-07-14 773-739-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2011-07-13 773-922-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN05 IL
2011-07-01 773-666-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CHICGOZN04 IL
2011-06-28 773-341-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2011-06-28 773-998-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2011-06-27 773-658-8XXX 8000–8999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN05 IL
2011-06-10 773-377-6XXX 6000–6999Assigned ONVOY, LLC 224C CHICGOZN11 IL
2011-05-24 773-666-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN04 IL
2011-05-24 773-666-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN04 IL
2011-05-24 773-666-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN04 IL
2011-05-19 773-242-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN06 IL
2011-05-19 773-644-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN02 IL
2011-05-19 773-644-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN02 IL
2011-05-19 773-644-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN02 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.