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
2009-01-29 605-691-0XXX 0000–0999Assigned AERIAL COMMUNICATIONS, INC. 6701 BROOKINGS SD
2009-01-22 605-951-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2009-01-22 605-951-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2009-01-22 605-951-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2009-01-22 605-951-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2009-01-20 605-877-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2009-01-20 605-877-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2009-01-20 605-877-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2008-12-17 605-496-0XXX 0000–0999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2008-11-11 605-877-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2008-11-11 605-877-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2008-11-04 605-223-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F PIERRE SD
2008-11-04 605-368-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F HARISBGTEA SD
2008-11-04 605-550-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F MITCHELL SD
2008-11-04 605-610-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2008-11-04 605-610-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2008-11-04 605-622-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F ABERDEEN SD
2008-11-04 605-644-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SPEARFISH SD
2008-11-04 605-868-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F WATERTOWN SD
2008-11-04 605-939-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2008-09-12 605-838-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-09-12 605-838-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-09-12 605-838-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-08-20 605-368-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G HARISBGTEA SD
2008-08-19 605-924-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 MILBANK SD
2008-08-19 605-956-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 WATERTOWN SD
2008-08-06 605-868-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERTOWN SD
2008-07-17 605-884-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 WATERTOWN SD
2008-06-23 605-610-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-06-23 605-787-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2008-06-23 605-787-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2008-06-17 605-838-0XXX 0000–0999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2008-06-17 605-951-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2008-06-11 605-353-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HURON SD
2008-05-08 605-277-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 ABERDEEN SD
2008-04-22 605-593-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2008-04-22 605-595-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-04-22 605-595-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-04-14 605-353-3XXX 3000–3999Assigned QWEST CORPORATION 9631 HURON SD
2008-02-19 605-610-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-02-19 605-610-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-02-15 605-593-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2008-02-11 605-868-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERTOWN SD
2008-02-01 605-593-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 RAPID CITY SD
2008-02-01 605-593-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 RAPID CITY SD
2008-01-31 605-569-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 BELLEFORCH SD
2008-01-31 605-569-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 BELLEFORCH SD
2008-01-30 605-610-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 SIOUX FLS SD
2008-01-30 605-610-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 SIOUX FLS SD
2008-01-21 605-370-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 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.