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
2015-04-07 773-974-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN11 IL
2015-03-23 773-570-8XXX 8000–8999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN11 IL
2014-12-22 773-917-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-12-22 773-917-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-12-22 773-917-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-12-22 773-917-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-12-22 773-917-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-10-27 773-831-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-10-27 773-831-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-10-27 773-831-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-10-27 773-831-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-10-20 773-217-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2014-10-20 773-217-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2014-10-20 773-217-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2014-10-20 773-217-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2014-09-24 773-638-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN06 IL
2014-09-24 773-762-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN06 IL
2014-09-18 773-394-9XXX 9000–9999Assigned METROPCS, INC. 5562 CHICGOZN04 IL
2014-09-18 773-868-7XXX 7000–7999Assigned METROPCS, INC. 5562 CHICGOZN04 IL
2014-09-05 773-570-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN11 IL
2014-09-05 773-570-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN11 IL
2014-09-05 773-786-9XXX 9000–9999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2014-09-03 773-538-7XXX 7000–7999Assigned METROPCS, INC. 5562 CHICGOZN07 IL
2014-09-03 773-819-8XXX 8000–8999Assigned METROPCS, INC. 5562 CHICGOZN07 IL
2014-09-03 773-962-8XXX 8000–8999Assigned METROPCS, INC. 5562 CHICGOZN07 IL
2014-08-22 773-635-1XXX 1000–1999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN06 IL
2014-08-18 773-482-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-08-18 773-482-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-08-18 773-482-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-08-07 773-269-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2014-07-22 773-394-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2014-06-27 773-536-4XXX 4000–4999Assigned METROPCS, INC. 5562 CHICGOZN07 IL
2014-06-27 773-536-6XXX 6000–6999Assigned METROPCS, INC. 5562 CHICGOZN07 IL
2014-06-27 773-536-7XXX 7000–7999Assigned METROPCS, INC. 5562 CHICGOZN07 IL
2014-06-27 773-798-1XXX 1000–1999Assigned METROPCS, INC. 5562 CHICGOZN07 IL
2014-06-27 773-798-4XXX 4000–4999Assigned METROPCS, INC. 5562 CHICGOZN07 IL
2014-06-18 773-399-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2014-06-18 773-554-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2014-05-19 773-831-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN11 IL
2014-04-30 773-797-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2014-04-30 773-887-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2014-04-30 773-887-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2014-04-23 773-453-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-04-23 773-453-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN11 IL
2014-04-23 773-904-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN04 IL
2014-01-23 773-377-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHICGOZN11 IL
2014-01-21 773-466-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2014-01-21 773-466-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2014-01-21 773-589-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 IL
2014-01-21 773-668-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN05 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.