NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 586
NEW CINGULAR WIRELESS PCS, LLC - IL 1
INTRADO COMMUNICATIONS, 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
2016-04-01 586-251-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UTICA MI
2016-03-24 586-571-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C CENTERLINE MI
2016-03-24 586-571-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C CENTERLINE MI
2016-03-21 586-701-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEW HAVEN MI
2016-03-21 586-701-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEW HAVEN MI
2016-03-15 586-250-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C WARREN MI
2016-03-15 586-250-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C WARREN MI
2016-03-15 586-371-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2016-03-15 586-371-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2016-03-15 586-460-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C ARMADA MI
2016-03-15 586-460-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ARMADA MI
2016-03-15 586-701-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C NEW HAVEN MI
2016-03-15 586-701-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C NEW HAVEN MI
2016-03-09 586-210-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2016-03-09 586-210-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2016-03-09 586-685-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C UTICA MI
2016-03-09 586-785-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ROMEO MI
2016-03-09 586-785-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ROMEO MI
2016-03-07 586-297-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-07 586-297-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-07 586-297-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-07 586-297-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-07 586-297-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-07 586-297-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-07 586-297-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-07 586-297-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-07 586-459-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-07 586-576-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CENTERLINE MI
2016-03-01 586-240-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-240-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-240-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-240-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-240-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-240-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-240-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-240-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-240-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-240-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-396-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-483-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-03-01 586-483-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI

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.