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
2007-09-04 773-953-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-738-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-738-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-738-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-738-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-738-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-953-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-953-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-953-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-953-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-31 773-953-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-08-27 773-893-4XXX 4000–4999Assigned ACCESS ONE, INC. - IL 5447 CHICGOZN06 IL
2007-08-24 773-360-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2007-08-24 773-661-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2007-08-24 773-698-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2007-08-24 773-698-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2007-08-24 773-698-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2007-08-24 773-920-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2007-08-22 773-964-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-22 773-964-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-22 773-964-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-22 773-964-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-22 773-964-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-22 773-964-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-17 773-698-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-08-17 773-698-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-08-17 773-698-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-08-17 773-698-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-08-13 773-971-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-13 773-971-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-13 773-971-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-13 773-971-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2007-08-01 773-952-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2007-08-01 773-952-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2007-08-01 773-952-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2007-08-01 773-952-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN07 IL
2007-07-24 773-963-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-24 773-963-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-24 773-963-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-24 773-963-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-24 773-963-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-19 773-963-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-19 773-963-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-19 773-963-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-19 773-963-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-19 773-963-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-07-16 773-789-2XXX 2000–2999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 CHICGOZN08 IL
2007-07-12 773-691-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2007-07-12 773-691-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2007-07-12 773-691-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 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.