NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 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 605
NEW CINGULAR WIRELESS PCS, LLC - IL 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 1
AHOI LLC 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
2014-03-21 605-888-9XXX 9000–9999Assigned ONVOY, LLC - SD 162G CHAMBERLAN SD
2014-03-17 605-377-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 ABERDEEN SD
2014-03-12 605-519-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2014-03-12 605-519-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2014-02-18 605-809-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SIOUX FLS SD
2014-02-05 605-776-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G PIERRE SD
2014-02-05 605-865-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 TIMBERLAKE SD
2014-01-21 605-309-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F NOVALENTIN SD
2014-01-16 605-377-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABERDEEN SD
2013-12-26 605-906-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2013-12-26 605-906-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2013-12-26 605-906-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2013-12-03 605-214-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HARISBGTEA SD
2013-11-20 605-204-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G MILLER SD
2013-11-20 605-204-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G MILLER SD
2013-11-20 605-223-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G PIERRE SD
2013-11-20 605-223-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G PIERRE SD
2013-11-20 605-546-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G IROQUOIS SD
2013-11-20 605-546-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G IROQUOIS SD
2013-11-20 605-574-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G HILL CITY SD
2013-11-20 605-599-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G CAVOUR SD
2013-11-20 605-599-9XXX 9000–9999Assigned ONVOY, LLC - SD 162G CAVOUR SD
2013-11-20 605-620-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G LK PRESTON SD
2013-11-20 605-620-9XXX 9000–9999Assigned ONVOY, LLC - SD 162G LK PRESTON SD
2013-11-20 605-626-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G ABERDEEN SD
2013-11-20 605-626-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G ABERDEEN SD
2013-11-20 605-865-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G TIMBERLAKE SD
2013-11-20 605-865-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H TIMBERLAKE SD
2013-11-19 605-408-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G HARISBGTEA SD
2013-11-19 605-408-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G HARISBGTEA SD
2013-11-19 605-443-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G SPEARFISH SD
2013-11-19 605-443-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G SPEARFISH SD
2013-11-19 605-467-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G MILBANK SD
2013-11-19 605-467-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G MILBANK SD
2013-11-19 605-472-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G REDFIELD SD
2013-11-19 605-472-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G REDFIELD SD
2013-11-19 605-519-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G RAPID CITY SD
2013-11-19 605-519-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G RAPID CITY SD
2013-11-19 605-550-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G MITCHELL SD
2013-11-19 605-550-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G MITCHELL SD
2013-11-19 605-627-0XXX 0000–0999Assigned ONVOY, LLC - SD 162G VOLGA SD
2013-11-19 605-627-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G VOLGA SD
2013-11-19 605-633-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G FLANDREAU SD
2013-11-19 605-633-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G FLANDREAU SD
2013-11-19 605-638-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G VERMILLION SD
2013-11-19 605-638-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G VERMILLION SD
2013-11-19 605-699-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G BELLEFORCH SD
2013-11-19 605-699-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G BELLEFORCH SD
2013-11-19 605-861-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G DE SMET SD
2013-11-19 605-861-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G DE SMET SD

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.