NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

49 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 464
NEW CINGULAR WIRELESS PCS, LLC - IL 43
ONVOY, LLC 4
OPENTACT INC. 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2025-04-16 464-267-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2025-03-28 464-262-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BLUEISLAND IL
2025-03-28 464-262-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BLUEISLAND IL
2025-03-13 464-241-9XXX 9000–9999Assigned ONVOY, LLC 224C CALUMET CY IL
2025-03-13 464-261-0XXX 0000–0999Assigned ONVOY, LLC 224C FOREST IL
2025-03-13 464-262-1XXX 1000–1999Assigned ONVOY, LLC 224C BLUEISLAND IL
2025-03-13 464-262-2XXX 2000–2999Assigned ONVOY, LLC 224C BLUEISLAND IL
2025-03-13 464-262-8XXX 8000–8999Assigned ONVOY, LLC 224C BLUEISLAND IL
2025-03-13 464-262-9XXX 9000–9999Assigned ONVOY, LLC 224C BLUEISLAND IL
2025-03-13 464-264-0XXX 0000–0999Assigned ONVOY, LLC 224C OAK LAWN IL
2025-03-10 464-240-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E BELLWOOD IL
2025-03-10 464-262-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E BLUEISLAND IL
2025-03-07 464-255-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-03-07 464-255-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-03-07 464-255-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-03-07 464-257-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2025-03-07 464-257-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2025-03-07 464-257-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2025-03-07 464-257-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2025-03-07 464-257-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2025-03-07 464-257-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2025-03-07 464-257-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2025-03-07 464-261-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-03-07 464-261-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-03-07 464-261-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-03-07 464-261-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-03-07 464-261-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-03-07 464-261-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-03-07 464-261-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-02-20 464-260-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2025-02-20 464-260-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2025-02-20 464-260-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2025-02-20 464-260-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2025-02-20 464-260-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2025-02-12 464-253-5XXX 5000–5999Assigned ONVOY, LLC 224C BLUEISLAND IL
2025-02-12 464-253-6XXX 6000–6999Assigned ONVOY, LLC 224C BLUEISLAND IL
2025-02-12 464-253-7XXX 7000–7999Assigned ONVOY, LLC 224C BLUEISLAND IL
2025-02-12 464-258-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CICERO IL
2025-02-12 464-259-0XXX 0000–0999Assigned ONVOY, LLC 224C CICERO IL
2025-02-10 464-253-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUEISLAND IL
2025-02-10 464-253-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUEISLAND IL
2025-02-10 464-253-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUEISLAND IL
2025-02-10 464-255-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-02-10 464-255-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-02-10 464-255-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-02-10 464-255-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-02-10 464-255-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2025-02-06 464-200-6XXX 6000–6999Assigned ONVOY, LLC 224C LANSING IL
2025-02-05 464-220-3XXX 3000–3999Assigned ONVOY, LLC 224C CRETE IL
2025-02-05 464-256-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICAGOHTS 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.