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
2021-12-21 872-822-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-12-21 872-822-9XXX 9000–9999Assigned METROPCS, INC. 5562 CHICGOZN07 IL
2021-12-21 872-844-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2021-12-21 872-844-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2021-12-21 872-844-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2021-12-21 872-844-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2021-12-21 872-844-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2021-12-21 872-844-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2021-12-21 872-844-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2021-12-21 872-844-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2021-12-21 872-844-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2021-12-21 872-844-9XXX 9000–9999Assigned METROPCS, INC. 5562 CHICGOZN09 IL
2021-12-21 872-855-9XXX 9000–9999Assigned METROPCS, INC. 5562 CHICGOZN04 IL
2021-12-16 872-284-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN05 IL
2021-12-16 872-284-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN05 IL
2021-12-16 872-284-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN05 IL
2021-12-16 872-284-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN05 IL
2021-12-16 872-292-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN10 IL
2021-12-16 872-292-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN10 IL
2021-12-16 872-292-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN10 IL
2021-12-16 872-292-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN10 IL
2021-12-16 872-297-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN07 IL
2021-12-16 872-297-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN07 IL
2021-12-16 872-297-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN07 IL
2021-12-16 872-297-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN07 IL
2021-12-16 872-313-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN08 IL
2021-12-16 872-313-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN08 IL
2021-12-16 872-313-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN08 IL
2021-12-16 872-313-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN08 IL
2021-12-16 872-313-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN08 IL
2021-12-16 872-313-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN08 IL
2021-12-16 872-678-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN11 IL
2021-12-16 872-678-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN11 IL
2021-12-16 872-678-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN11 IL
2021-12-14 872-271-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2021-12-14 872-946-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2021-12-14 872-946-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2021-12-08 872-871-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-12-08 872-871-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H CHICGOZN01 IL
2021-12-08 872-871-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-12-08 872-871-6XXX 6000–6999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-11-24 872-291-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2021-11-24 872-291-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2021-11-24 872-313-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2021-11-23 872-298-0XXX 0000–0999Assigned TELNYX LLC 073H CHICGOZN01 IL
2021-11-17 872-871-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2021-11-04 872-297-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-11-04 872-297-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-11-04 872-297-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-11-04 872-297-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 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.