NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

25 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 501
ONVOY, LLC - AR 15
BANDWIDTH.COM CLEC, LLC - AR 5
CSC WIRELESS, LLC 2
NEW CINGULAR WIRELESS PCS, LLC - IL 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 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
2022-01-11 501-568-8XXX 8000–8999Assigned METROPCS, INC. 5562 LITTLEROCK AR
2022-01-11 501-635-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2022-01-05 501-518-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F DAMASCUS AR
2021-12-17 501-403-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BENTON AR
2021-12-17 501-431-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HOTSPRINGS AR
2021-12-17 501-497-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CONWAY AR
2021-12-08 501-498-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J LITTLEROCK AR
2021-12-06 501-469-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H BIGELOW AR
2021-12-02 501-456-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F JUDSONIA AR
2021-12-02 501-799-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALARM AR
2021-12-02 501-799-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALARM AR
2021-12-01 501-489-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MALVERN AR
2021-12-01 501-489-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MALVERN AR
2021-11-09 501-302-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F HEBER SPG AR
2021-11-09 501-491-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BEEBE AR
2021-11-05 501-446-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CABOT AR
2021-11-05 501-446-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CABOT AR
2021-11-05 501-512-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BRYANTCGVL AR
2021-11-05 501-512-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H BRYANTCGVL AR
2021-11-02 501-287-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F GREENBRIER AR
2021-11-02 501-294-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F MORGANTON AR
2021-11-02 501-330-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F WYE AR
2021-11-02 501-331-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F PERRYVILLE AR
2021-11-02 501-393-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F PANGBURN AR
2021-11-02 501-419-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F ROSE BUD AR
2021-11-01 501-462-0XXX 0000–0999Assigned TELNYX LLC 073H SEARCY AR
2021-11-01 501-497-0XXX 0000–0999Assigned TELNYX LLC 073H CONWAY AR
2021-10-28 501-287-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F GREENBRIER AR
2021-10-28 501-287-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F GREENBRIER AR
2021-10-28 501-808-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F VILONIA AR
2021-10-28 501-808-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F VILONIA AR
2021-10-26 501-522-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BENTON AR
2021-10-26 501-522-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BENTON AR
2021-10-25 501-599-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F SYVNHLSHWD AR
2021-10-25 501-599-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F SYVNHLSHWD AR
2021-10-25 501-599-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F SYVNHLSHWD AR
2021-10-25 501-808-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VILONIA AR
2021-10-14 501-446-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CABOT AR
2021-10-13 501-283-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BALD KNOB AR
2021-10-13 501-461-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BAUXITE AR
2021-10-13 501-461-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BAUXITE AR
2021-10-13 501-464-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BALD KNOB AR
2021-10-13 501-488-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BRADFORD AR
2021-10-13 501-488-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BRADFORD AR
2021-10-13 501-665-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J LITTLEROCK AR
2021-10-13 501-665-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J LITTLEROCK AR
2021-10-11 501-489-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2021-10-11 501-489-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2021-10-11 501-489-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2021-10-08 501-521-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HOTSPRINGS AR

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.