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
2020-11-11 605-971-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G ABERDEEN SD
2020-11-11 605-971-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G ABERDEEN SD
2020-11-04 605-607-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2020-11-04 605-607-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2020-11-04 605-607-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2020-11-04 605-607-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2020-11-02 605-987-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 CANTON SD
2020-10-29 605-989-1XXX 1000–1999Assigned NUSO, LLC 478J NOVALENTIN SD
2020-10-23 605-601-6XXX 6000–6999Assigned TWILIO INTERNATIONAL, INC. 506J SIOUX FLS SD
2020-10-22 605-403-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 SIOUX FLS SD
2020-10-22 605-549-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SPEARFISH SD
2020-10-20 605-307-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 HILL CITY SD
2020-10-14 605-981-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2020-10-08 605-863-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RAPID CITY SD
2020-09-24 605-674-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G BIGSTONECY SD
2020-09-24 605-674-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G BIGSTONECY SD
2020-09-23 605-291-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G MADISON SD
2020-09-23 605-303-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G WATERTOWN SD
2020-09-23 605-307-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G HILL CITY SD
2020-09-23 605-315-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G ARLINGTON SD
2020-09-23 605-315-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G ARLINGTON SD
2020-09-23 605-316-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G IROQUOIS SD
2020-09-23 605-443-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G SPEARFISH SD
2020-09-23 605-443-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G SPEARFISH SD
2020-09-23 605-450-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G REDFIELD SD
2020-09-23 605-453-7XXX 7000–7999Assigned ONVOY, LLC - SD 162G MILLER SD
2020-09-23 605-525-1XXX 1000–1999Assigned ONVOY, LLC - SD 162G LK PRESTON SD
2020-09-23 605-570-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G HURON SD
2020-09-23 605-640-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G MCINTOSH SD
2020-09-23 605-656-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G MITCHELL SD
2020-09-23 605-667-1XXX 1000–1999Assigned ONVOY, LLC - SD 162G HARISBGTEA SD
2020-09-23 605-699-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G BELLEFORCH SD
2020-09-23 605-702-8XXX 8000–8999Assigned ONVOY, LLC - SD 162G STURGIS SD
2020-09-23 605-846-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G ABERDEEN SD
2020-09-23 605-952-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G ELK POINT SD
2020-09-16 605-515-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 WALL SD
2020-09-15 605-403-1XXX 1000–1999Assigned NUSO, LLC 478J SIOUX FLS SD
2020-08-21 605-534-5XXX 5000–5999Assigned VALLEY COMMUNICATIONS, INC. D/B/A VALLEY FIBERCOM 363J FLANDREAU SD
2020-08-18 605-774-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2020-07-28 605-534-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 FLANDREAU SD
2020-07-28 605-924-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G MILBANK SD
2020-07-24 605-210-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G BELLEFORCH SD
2020-07-24 605-210-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G BELLEFORCH SD
2020-07-24 605-307-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G HILL CITY SD
2020-07-24 605-307-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G HILL CITY SD
2020-07-24 605-316-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G IROQUOIS SD
2020-07-24 605-316-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G IROQUOIS SD
2020-07-24 605-453-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G MILLER SD
2020-07-24 605-453-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G MILLER SD
2020-07-24 605-499-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G STURGIS 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.