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
2011-07-05 501-954-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-06-21 501-243-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-06-21 501-243-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-06-21 501-243-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-06-21 501-243-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-06-21 501-243-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-06-07 501-261-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F SPRINGLAKE AR
2011-06-03 501-400-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-06-03 501-400-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-06-03 501-400-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-06-03 501-400-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-06-03 501-400-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-06-03 501-722-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2011-05-31 501-604-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-05-31 501-604-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-05-31 501-618-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-05-31 501-661-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-05-31 501-708-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-05-23 501-436-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F SYVNHLSHWD AR
2011-05-20 501-481-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRYANTCGVL AR
2011-05-10 501-237-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2011-05-10 501-237-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2011-05-10 501-304-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MALVERN AR
2011-05-03 501-458-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2011-05-03 501-458-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2011-05-03 501-458-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2011-05-03 501-458-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2011-05-03 501-458-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2011-05-03 501-458-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2011-05-02 501-223-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-05-02 501-244-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-05-02 501-515-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-05-02 501-558-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-05-02 501-584-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-04-21 501-266-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2011-04-21 501-438-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2011-04-19 501-288-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEEBE AR
2011-04-19 501-413-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-04-19 501-413-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-04-19 501-463-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2011-04-19 501-463-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2011-04-19 501-687-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-04-19 501-687-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-04-19 501-687-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-03-31 501-295-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2011-03-31 501-301-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2011-03-31 501-301-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2011-03-31 501-396-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2011-03-31 501-490-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2011-03-31 501-859-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK 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.