NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 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 623
BOOST SUBSCRIBERCO L.L.C. 2
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
2026-09-10 623-438-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2026-08-21 623-438-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2026-08-19 623-310-5XXX 5000–5999Assigned INTRADO COMMUNICATIONS, LLC 890G PHOENIX AZ
2026-08-19 623-310-6XXX 6000–6999Assigned INTRADO COMMUNICATIONS, LLC 890G PHOENIX AZ
2026-08-19 623-310-7XXX 7000–7999Assigned INTRADO COMMUNICATIONS, LLC 890G PHOENIX AZ
2026-08-14 623-310-0XXX 0000–0999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2026-08-14 623-310-1XXX 1000–1999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2026-08-14 623-310-2XXX 2000–2999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2026-08-14 623-310-3XXX 3000–3999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2026-08-14 623-310-4XXX 4000–4999Assigned ONVOY, LLC - AZ 630E PHOENIX AZ
2026-08-07 623-438-2XXX 2000–2999Assigned AHOI LLC 883K PHOENIX AZ
2026-08-07 623-438-8XXX 8000–8999Assigned AHOI LLC 883K PHOENIX AZ
2026-08-07 623-438-9XXX 9000–9999Assigned AHOI LLC 883K PHOENIX AZ
2026-05-19 623-373-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2026-05-19 623-373-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2026-05-19 623-373-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2026-05-19 623-373-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2026-05-19 623-373-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2026-05-19 623-373-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2026-05-19 623-373-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2026-05-19 623-373-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2026-05-19 623-373-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2026-04-20 623-373-0XXX 0000–0999Assigned VOIP INNOVATIONS, LLC 597F PHOENIX AZ
2026-01-29 623-581-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2025-12-16 623-955-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2025-12-16 623-955-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2025-11-21 623-955-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2025-11-21 623-955-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2025-11-21 623-955-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2025-11-21 623-955-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2025-10-22 623-955-5XXX 5000–5999Assigned ALLO COMMUNICATIONS LLC 907K PHOENIX AZ
2025-05-28 623-456-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2025-05-28 623-456-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2025-05-28 623-456-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2025-05-28 623-456-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2025-05-28 623-456-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2025-05-05 623-456-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2025-05-05 623-456-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2025-05-05 623-456-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2025-05-05 623-456-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2025-05-05 623-456-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2025-04-09 623-260-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2025-02-18 623-239-6XXX 6000–6999Assigned PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2025-01-13 623-349-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2025-01-06 623-428-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2025-01-06 623-428-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2024-11-07 623-201-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2024-07-23 623-260-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2024-07-23 623-260-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ
2024-07-23 623-260-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PHOENIX AZ

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.