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
2018-12-11 605-800-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J SIOUX FLS SD
2018-12-06 605-827-2XXX 2000–2999Assigned VALLEY COMMUNICATIONS, INC. D/B/A VALLEY FIBERCOM 363J VOLGA SD
2018-11-28 605-530-8XXX 8000–8999Assigned AIRUS, INC. - SD 580H FLANDREAU SD
2018-11-28 605-961-2XXX 2000–2999Assigned AIRUS, INC. - SD 580H SIOUX FLS SD
2018-11-20 605-740-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2018-11-16 605-937-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 SIOUX FLS SD
2018-10-29 605-656-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 MITCHELL SD
2018-10-26 605-305-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX FLS SD
2018-10-26 605-679-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX FLS SD
2018-10-04 605-202-6XXX 6000–6999Assigned AIRUS, INC. - SD 580H VERMILLION SD
2018-09-24 605-961-3XXX 3000–3999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2018-09-24 605-961-4XXX 4000–4999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2018-09-24 605-961-5XXX 5000–5999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2018-09-24 605-961-6XXX 6000–6999Assigned ONVOY, LLC - SD 162G SIOUX FLS SD
2018-09-13 605-210-9XXX 9000–9999Assigned TELNYX LLC 073H BELLEFORCH SD
2018-09-13 605-741-8XXX 8000–8999Assigned TELNYX LLC 073H VERMILLION SD
2018-09-13 605-857-2XXX 2000–2999Assigned TELNYX LLC 073H YANKTON SD
2018-09-13 605-949-8XXX 8000–8999Assigned TELNYX LLC 073H MILBANK SD
2018-09-11 605-305-9XXX 9000–9999Assigned AIRUS, INC. - SD 580H SIOUX FLS SD
2018-09-11 605-653-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G YANKTON SD
2018-08-28 605-305-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX FLS SD
2018-08-24 605-540-1XXX 1000–1999Assigned ONVOY, LLC - SD 162G NOSIOUX CY SD
2018-08-22 605-961-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2018-08-22 605-961-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2018-08-20 605-777-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HARISBGTEA SD
2018-08-16 605-653-8XXX 8000–8999Assigned AIRUS, INC. - SD 580H YANKTON SD
2018-08-13 605-846-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 ABERDEEN SD
2018-07-20 605-659-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F VERMILLION SD
2018-07-19 605-872-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2018-07-19 605-872-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2018-07-06 605-570-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2018-07-06 605-741-1XXX 1000–1999Assigned AIRUS, INC. - SD 580H VERMILLION SD
2018-07-06 605-777-8XXX 8000–8999Assigned AIRUS, INC. - SD 580H HARISBGTEA SD
2018-06-29 605-453-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F MILLER SD
2018-06-22 605-961-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D SIOUX FLS SD
2018-06-15 605-857-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 YANKTON SD
2018-06-04 605-291-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F MADISON SD
2018-05-24 605-872-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RAPID CITY SD
2018-05-14 605-309-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F NOVALENTIN SD
2018-05-11 605-453-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F MILLER SD
2018-05-01 605-231-9XXX 9000–9999Assigned AIRUS, INC. - SD 580H SIOUX FLS SD
2018-04-19 605-524-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F MCINTOSH SD
2018-04-19 605-524-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F MCINTOSH SD
2018-04-02 605-570-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2018-04-02 605-570-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2018-04-02 605-570-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2018-03-14 605-777-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G HARISBGTEA SD
2018-03-09 605-872-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RAPID CITY SD
2018-03-07 605-741-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA SD-LLC 693G VERMILLION SD
2018-02-08 605-846-9XXX 9000–9999Assigned AIRUS, INC. - SD 580H 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.