NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

9 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2023-05-01 872-335-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2023-05-01 872-335-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2023-04-28 872-867-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2023-04-19 872-355-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN01 IL
2023-04-19 872-355-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN01 IL
2023-04-14 872-332-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN02 IL
2023-04-14 872-367-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2023-04-05 872-299-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN01 IL
2023-04-05 872-299-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN01 IL
2023-04-05 872-318-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN01 IL
2023-04-05 872-318-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN01 IL
2023-04-05 872-327-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN04 IL
2023-04-05 872-342-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN01 IL
2023-04-05 872-342-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN01 IL
2023-04-05 872-342-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN01 IL
2023-04-05 872-342-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CHICGOZN01 IL
2023-03-21 872-328-1XXX 1000–1999Assigned TELNYX LLC 073H CHICGOZN06 IL
2023-03-17 872-332-0XXX 0000–0999Assigned FIVE9, INC. 598J CHICGOZN02 IL
2023-03-14 872-329-9XXX 9000–9999Assigned AT&T - LOCAL 7421 CHICGOZN10 IL
2023-03-14 872-330-0XXX 0000–0999Assigned LEAP TELECOM, LLC 616J CHICGOZN02 IL
2023-03-10 872-328-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN06 IL
2023-02-15 872-327-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN04 IL
2023-01-13 872-372-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2023-01-13 872-372-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2023-01-13 872-372-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2022-12-19 872-271-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN03 IL
2022-12-19 872-273-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN03 IL
2022-12-19 872-273-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN03 IL
2022-12-19 872-273-6XXX 6000–6999Assigned ONVOY, LLC 224C CHICGOZN03 IL
2022-12-19 872-273-7XXX 7000–7999Assigned ONVOY, LLC 224C CHICGOZN03 IL
2022-12-06 872-324-9XXX 9000–9999Assigned TELNYX LLC 073H CHICGOZN09 IL
2022-12-06 872-326-0XXX 0000–0999Assigned TELNYX LLC 073H CHICGOZN07 IL
2022-12-06 872-327-0XXX 0000–0999Assigned TELNYX LLC 073H CHICGOZN04 IL
2022-11-30 872-342-0XXX 0000–0999Assigned TELNYX LLC 073H CHICGOZN01 IL
2022-11-30 872-342-1XXX 1000–1999Assigned TELNYX LLC 073H CHICGOZN01 IL
2022-11-30 872-342-7XXX 7000–7999Assigned TELNYX LLC 073H CHICGOZN01 IL
2022-11-30 872-342-8XXX 8000–8999Assigned TELNYX LLC 073H CHICGOZN01 IL
2022-11-30 872-342-9XXX 9000–9999Assigned TELNYX LLC 073H CHICGOZN01 IL
2022-11-23 872-326-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2022-11-23 872-326-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2022-11-23 872-326-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2022-11-23 872-326-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2022-11-23 872-327-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2022-11-23 872-327-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2022-11-23 872-327-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2022-11-23 872-327-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2022-11-23 872-327-6XXX 6000–6999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2022-11-22 872-298-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2022-11-22 872-298-6XXX 6000–6999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2022-11-22 872-298-7XXX 7000–7999Assigned ONVOY, LLC 224C CHICGOZN01 IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.