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
2012-11-21 605-412-9XXX 9000–9999Assigned ONVOY, LLC - SD 162G HURON SD
2012-11-21 605-467-2XXX 2000–2999Assigned ONVOY, LLC - SD 162G MILBANK SD
2012-11-21 605-519-2XXX 2000–2999Assigned ONVOY, LLC - SD 162G RAPID CITY SD
2012-11-21 605-534-1XXX 1000–1999Assigned ONVOY, LLC - SD 162G FLANDREAU SD
2012-11-21 605-546-1XXX 1000–1999Assigned ONVOY, LLC - SD 162G IROQUOIS SD
2012-11-21 605-574-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G HILL CITY SD
2012-11-21 605-599-1XXX 1000–1999Assigned ONVOY, LLC - SD 162G CAVOUR SD
2012-11-21 605-627-2XXX 2000–2999Assigned ONVOY, LLC - SD 162G VOLGA SD
2012-11-21 605-860-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G DE SMET SD
2012-11-21 605-865-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G TIMBERLAKE SD
2012-11-19 605-269-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G SPEARFISH SD
2012-11-19 605-653-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G YANKTON SD
2012-11-19 605-760-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G YANKTON SD
2012-11-16 605-205-1XXX 1000–1999Assigned ONVOY, LLC - SD 162G ELK POINT SD
2012-11-16 605-205-2XXX 2000–2999Assigned ONVOY, LLC - SD 162G ELK POINT SD
2012-11-16 605-273-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G MCINTOSH SD
2012-11-16 605-340-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G SPEARFISH SD
2012-11-16 605-340-9XXX 9000–9999Assigned ONVOY, LLC - SD 162G SPEARFISH SD
2012-11-16 605-636-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G MADISON SD
2012-11-16 605-636-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G MADISON SD
2012-11-09 605-408-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HARISBGTEA SD
2012-09-28 605-936-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2012-09-28 605-936-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2012-09-24 605-743-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F HARISBGTEA SD
2012-09-19 605-679-2XXX 2000–2999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2012-09-19 605-906-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2012-09-19 605-906-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2012-09-18 605-461-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G HURON SD
2012-08-14 605-299-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F MITCHELL SD
2012-08-10 605-461-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2012-08-09 605-269-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G SPEARFISH SD
2012-07-27 605-744-0XXX 0000–0999Assigned MIDCONTINENT COMMUNICATIONS. - SD 7076 LENNOX SD
2012-07-26 605-432-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F MILBANK SD
2012-07-13 605-254-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2012-07-13 605-254-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2012-07-13 605-412-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2012-07-13 605-782-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2012-07-09 605-646-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G RAPID CITY SD
2012-07-05 605-461-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2012-06-12 605-646-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2012-05-08 605-519-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2012-05-02 605-377-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 ABERDEEN SD
2012-05-02 605-858-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2012-05-02 605-858-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2012-04-09 605-496-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2012-04-05 605-646-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2012-03-28 605-809-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SIOUX FLS SD
2012-02-29 605-789-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 SIOUX FLS SD
2012-02-10 605-599-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G CAVOUR SD
2012-02-06 605-906-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G SIOUX FLS 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.