NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 872
NEW CINGULAR WIRELESS PCS, LLC - IL 8
8X8, INC. 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
2015-10-20 872-276-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2015-10-20 872-904-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-10-20 872-904-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-10-20 872-904-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-10-20 872-904-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-09-21 872-276-1XXX 1000–1999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN06 IL
2015-09-17 872-813-8XXX 8000–8999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN05 IL
2015-09-15 872-810-9XXX 9000–9999Assigned PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN02 IL
2015-08-26 872-315-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN04 IL
2015-08-18 872-242-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2015-08-18 872-242-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2015-08-18 872-242-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2015-07-24 872-315-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2015-07-24 872-315-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2015-07-24 872-315-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2015-07-24 872-904-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-07-24 872-904-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-07-24 872-904-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-07-24 872-904-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-07-23 872-267-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN08 IL
2015-07-16 872-215-9XXX 9000–9999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-07-16 872-244-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-07-16 872-308-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2015-07-16 872-469-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2015-07-16 872-469-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2015-07-16 872-469-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2015-07-16 872-469-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2015-07-16 872-639-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-07-16 872-713-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2015-07-16 872-810-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2015-07-16 872-810-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2015-07-16 872-814-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN04 IL
2015-07-16 872-817-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2015-07-16 872-817-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2015-07-16 872-901-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-07-16 872-901-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2015-06-26 872-401-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-401-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-401-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-401-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-401-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-401-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-465-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-465-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-465-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-465-9XXX 9000–9999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-639-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-639-7XXX 7000–7999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-639-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2015-06-26 872-639-9XXX 9000–9999Assigned ONVOY, LLC 224C CHICGOZN07 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.