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
2016-05-19 501-585-5XXX 5000–5999Assigned METROPCS, INC. 5562 CONWAY AR
2016-05-06 501-406-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C LITTLEROCK AR
2016-05-06 501-486-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGLAKE AR
2016-05-06 501-486-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGLAKE AR
2016-05-04 501-602-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BAUXITE AR
2016-05-03 501-585-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C CONWAY AR
2016-04-22 501-651-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 HOTSPRINGS AR
2016-04-04 501-830-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FERNDALE AR
2016-03-31 501-406-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2016-03-29 501-424-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
2016-03-29 501-424-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
2016-03-29 501-424-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
2016-03-22 501-575-1XXX 1000–1999Assigned ONVOY, LLC - AR 348F BENTON AR
2016-03-22 501-575-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F BENTON AR
2016-03-16 501-693-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOTSPRINGS AR
2016-03-15 501-222-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F WRIGHTSVL AR
2016-03-15 501-478-7XXX 7000–7999Assigned METROPCS, INC. 5562 LITTLEROCK AR
2016-03-15 501-777-4XXX 4000–4999Assigned METROPCS, INC. 5562 LITTLEROCK AR
2016-03-15 501-897-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F WRIGHTSVL AR
2016-03-14 501-486-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F SPRINGLAKE AR
2016-03-14 501-486-1XXX 1000–1999Assigned ONVOY, LLC - AR 348F SPRINGLAKE AR
2016-03-07 501-737-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F SCOTT AR
2016-03-07 501-737-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F SCOTT AR
2016-03-02 501-476-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2016-02-26 501-673-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F PINNACLE AR
2016-02-26 501-673-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F PINNACLE AR
2016-02-25 501-893-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F CENTER RDG AR
2016-02-25 501-893-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F CENTER RDG AR
2016-02-24 501-238-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F GREERSFRRY AR
2016-02-24 501-238-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F GREERSFRRY AR
2016-02-24 501-653-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F BRYANTCGVL AR
2016-02-24 501-653-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F BRYANTCGVL AR
2016-02-24 501-830-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F FERNDALE AR
2016-02-24 501-830-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F FERNDALE AR
2016-02-19 501-510-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F LONOKE AR
2016-02-19 501-510-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F LONOKE AR
2016-02-17 501-858-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F BEEBE AR
2016-02-17 501-858-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F BEEBE AR
2016-02-12 501-302-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F HEBER SPG AR
2016-02-12 501-302-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F HEBER SPG AR
2016-02-12 501-864-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SYVNHLSHWD AR
2016-02-12 501-864-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SYVNHLSHWD AR
2016-02-11 501-406-4XXX 4000–4999Assigned METROPCS, INC. 5562 LITTLEROCK AR
2016-02-11 501-406-5XXX 5000–5999Assigned METROPCS, INC. 5562 LITTLEROCK AR
2016-02-10 501-267-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F MALVERN AR
2016-02-10 501-267-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F MALVERN AR
2016-02-09 501-289-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F MORRILTON AR
2016-02-09 501-289-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F MORRILTON AR
2016-02-08 501-819-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F SYVNHLSHWD AR
2016-02-08 501-819-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F SYVNHLSHWD 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.