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
2016-02-03 501-254-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F SEARCY AR
2016-02-03 501-254-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F SEARCY AR
2016-02-02 501-504-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F CONWAY AR
2016-02-02 501-764-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F CONWAY AR
2016-01-28 501-881-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F HOTSPRINGS AR
2016-01-28 501-881-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F HOTSPRINGS AR
2016-01-27 501-596-9XXX 9000–9999Assigned E. RITTER COMMUNICATIONS, LLC 128L JACKSONVL AR
2016-01-15 501-294-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MORGANTON AR
2016-01-08 501-422-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C CABOT AR
2015-12-31 501-800-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F PALARM AR
2015-12-09 501-547-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOTSPRINGS AR
2015-12-04 501-406-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2015-12-04 501-406-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2015-12-04 501-406-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2015-12-02 501-781-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HOTSPRINGS AR
2015-11-20 501-259-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
2015-10-28 501-457-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J JACKSONVL AR
2015-10-21 501-575-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 BENTON AR
2015-10-15 501-288-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEEBE AR
2015-10-09 501-575-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BENTON AR
2015-10-07 501-703-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LONOKE AR
2015-10-06 501-585-3XXX 3000–3999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 CONWAY AR
2015-10-02 501-238-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F GREERSFRRY AR
2015-10-02 501-239-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BEEBE AR
2015-10-02 501-242-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MORRILTON AR
2015-10-02 501-254-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F SEARCY AR
2015-10-02 501-267-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MALVERN AR
2015-10-02 501-270-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F HEBER SPG AR
2015-10-02 501-486-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 SPRINGLAKE AR
2015-10-02 501-891-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2015-10-02 501-914-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2015-10-02 501-914-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2015-10-02 501-914-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2015-10-02 501-914-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2015-10-02 501-914-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2015-10-02 501-914-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2015-10-02 501-914-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2015-10-01 501-585-2XXX 2000–2999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 CONWAY AR
2015-09-28 501-697-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F CONWAY AR
2015-09-24 501-239-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BEEBE AR
2015-09-24 501-508-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2015-09-22 501-625-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F HOTSPRINGS AR
2015-09-21 501-406-1XXX 1000–1999Assigned AIRUS, INC. - AR 578H LITTLEROCK AR
2015-09-15 501-316-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BENTON AR
2015-09-15 501-800-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 PALARM AR
2015-09-08 501-254-5XXX 5000–5999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 SEARCY AR
2015-08-31 501-891-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2015-08-28 501-864-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SYVNHLSHWD AR
2015-08-25 501-486-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGLAKE AR
2015-08-11 501-422-6XXX 6000–6999Assigned E. RITTER COMMUNICATIONS, LLC 128L CABOT 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.