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
2008-01-21 605-593-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 RAPID CITY SD
2008-01-17 605-385-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 RAPID CITY SD
2008-01-15 605-370-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 SIOUX FLS SD
2008-01-15 605-370-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-01-15 605-370-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2008-01-15 605-593-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2007-11-26 605-370-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2007-11-26 605-370-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2007-11-26 605-593-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2007-11-26 605-593-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2007-10-24 605-370-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2007-10-24 605-370-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2007-10-24 605-786-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2007-10-08 605-252-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ABERDEEN SD
2007-10-08 605-301-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PIERRE SD
2007-10-08 605-655-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 YANKTON SD
2007-10-08 605-884-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WATERTOWN SD
2007-10-03 605-312-0XXX 0000–0999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-10-03 605-312-1XXX 1000–1999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-10-03 605-312-2XXX 2000–2999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-10-03 605-312-3XXX 3000–3999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-10-03 605-312-4XXX 4000–4999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-10-03 605-312-5XXX 5000–5999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-10-03 605-312-6XXX 6000–6999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-10-03 605-312-7XXX 7000–7999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-10-03 605-312-8XXX 8000–8999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-10-03 605-312-9XXX 9000–9999Assigned QWEST CORPORATION 9631 SIOUX FLS SD
2007-09-25 605-828-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION SD
2007-09-25 605-828-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION SD
2007-09-25 605-828-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION SD
2007-09-25 605-828-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION SD
2007-09-25 605-828-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION SD
2007-09-25 605-828-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION SD
2007-09-25 605-828-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION SD
2007-09-25 605-828-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION SD
2007-08-30 605-884-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERTOWN SD
2007-08-07 605-553-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2007-08-07 605-553-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2007-08-07 605-786-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2007-08-01 605-595-1XXX 1000–1999Assigned AERIAL COMMUNICATIONS, INC. 6701 SIOUX FLS SD
2007-08-01 605-595-6XXX 6000–6999Assigned AERIAL COMMUNICATIONS, INC. 6701 SIOUX FLS SD
2007-07-25 605-353-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HURON SD
2007-06-15 605-415-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2007-06-15 605-553-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2007-06-15 605-553-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2007-04-25 605-553-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2007-03-26 605-655-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 YANKTON SD
2007-03-14 605-715-0XXX 0000–0999Assigned JAMES VALLEY WIRELESS, LLC 815E ABERDEEN SD
2007-03-14 605-715-1XXX 1000–1999Assigned JAMES VALLEY WIRELESS, LLC 815E ABERDEEN SD
2007-03-14 605-715-2XXX 2000–2999Assigned JAMES VALLEY WIRELESS, LLC 815E ABERDEEN 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.