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
2019-03-06 501-200-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F REDFIELD AR
2019-03-06 501-200-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F REDFIELD AR
2019-03-06 501-253-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CLINTON AR
2019-03-04 501-817-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FERNDALE AR
2019-02-26 501-359-3XXX 3000–3999Assigned E. RITTER COMMUNICATIONS, LLC 128L HOTSPRINGS AR
2019-02-26 501-601-1XXX 1000–1999Assigned E. RITTER COMMUNICATIONS, LLC 128L MALVERN AR
2019-02-13 501-298-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGLAKE AR
2019-02-04 501-263-8XXX 8000–8999Assigned AIRUS, INC. - AR 578H LITTLEROCK AR
2019-02-04 501-333-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MAUMELLE AR
2019-01-30 501-290-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 SEARCY AR
2019-01-24 501-900-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J LITTLEROCK AR
2019-01-14 501-274-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2019-01-14 501-274-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2019-01-08 501-273-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CONWAY AR
2018-12-28 501-424-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
2018-12-28 501-858-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEEBE AR
2018-12-27 501-534-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C LITTLEROCK AR
2018-12-17 501-200-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F REDFIELD AR
2018-12-17 501-200-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F REDFIELD AR
2018-12-17 501-261-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F SPRINGLAKE AR
2018-12-17 501-290-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F SEARCY AR
2018-12-17 501-290-1XXX 1000–1999Assigned ONVOY, LLC - AR 348F SEARCY AR
2018-12-17 501-299-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F KENSETT AR
2018-12-17 501-299-1XXX 1000–1999Assigned ONVOY, LLC - AR 348F KENSETT AR
2018-12-17 501-417-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F JUDSONIA AR
2018-12-17 501-417-1XXX 1000–1999Assigned ONVOY, LLC - AR 348F JUDSONIA AR
2018-12-17 501-434-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F MCRAE AR
2018-12-17 501-434-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F MCRAE AR
2018-12-17 501-475-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F SPRINGLAKE AR
2018-12-17 501-500-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2018-12-17 501-500-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2018-12-17 501-510-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F LONOKE AR
2018-12-17 501-510-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F LONOKE AR
2018-12-17 501-802-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F JONESMILLS AR
2018-12-17 501-802-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F JONESMILLS AR
2018-12-17 501-984-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F JESSIEVL AR
2018-12-17 501-984-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F JESSIEVL AR
2018-12-17 501-991-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F CRYSTALSPG AR
2018-12-17 501-991-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F CRYSTALSPG AR
2018-12-11 501-261-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGLAKE AR
2018-12-11 501-300-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F BRADFORD AR
2018-12-11 501-600-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F PLEASANTPL AR
2018-12-05 501-292-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F BALD KNOB AR
2018-12-05 501-292-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F BALD KNOB AR
2018-12-05 501-424-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F CABOT AR
2018-12-05 501-424-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F CABOT AR
2018-12-05 501-509-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F COY AR
2018-12-05 501-509-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F COY AR
2018-12-05 501-602-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F BAUXITE AR
2018-12-05 501-602-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F BAUXITE 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.