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
2015-04-15 605-937-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2015-04-13 605-679-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SIOUX FLS SD
2015-04-13 605-858-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RAPID CITY SD
2015-03-23 605-944-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 MARTIN SD
2015-02-20 605-824-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABERDEEN SD
2015-01-26 605-443-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPEARFISH SD
2015-01-21 605-223-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F PIERRE SD
2014-12-17 605-408-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HARISBGTEA SD
2014-12-09 605-223-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F PIERRE SD
2014-12-09 605-412-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F HURON SD
2014-12-01 605-389-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2014-12-01 605-863-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2014-11-19 605-377-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F ABERDEEN SD
2014-11-13 605-219-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2014-11-13 605-824-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 ABERDEEN SD
2014-10-30 605-906-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2014-10-30 605-951-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2014-10-28 605-231-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX FLS SD
2014-10-28 605-440-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CUSTER SD
2014-10-28 605-460-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REDFIELD SD
2014-10-10 605-857-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F YANKTON SD
2014-09-30 605-988-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 SIOUX FLS SD
2014-09-15 605-646-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2014-09-15 605-809-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2014-09-12 605-206-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 STURGIS SD
2014-09-11 605-626-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABERDEEN SD
2014-07-29 605-202-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F VERMILLION SD
2014-07-29 605-277-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F ABERDEEN SD
2014-07-08 605-368-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HARISBGTEA SD
2014-07-08 605-681-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2014-07-08 605-681-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2014-07-08 605-681-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2014-06-23 605-389-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2014-06-23 605-389-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2014-06-23 605-389-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2014-06-10 605-220-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F PIERRE SD
2014-05-29 605-277-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABERDEEN SD
2014-05-27 605-809-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SIOUX FLS SD
2014-05-14 605-651-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 BROOKINGS SD
2014-05-14 605-653-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 YANKTON SD
2014-05-09 605-679-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 SIOUX FLS SD
2014-04-14 605-613-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 PLATTE SD
2014-04-14 605-847-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 LK PRESTON SD
2014-04-14 605-847-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 LK PRESTON SD
2014-04-14 605-847-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 LK PRESTON SD
2014-04-14 605-847-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 LK PRESTON SD
2014-04-14 605-944-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 MARTIN SD
2014-04-02 605-277-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABERDEEN SD
2014-04-02 605-277-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABERDEEN SD
2014-03-21 605-888-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G CHAMBERLAN 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.