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
2011-01-12 605-760-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 YANKTON SD
2010-12-23 605-838-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 SIOUX FLS SD
2010-12-17 605-877-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2010-11-17 605-821-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUPREE SD
2010-11-09 605-469-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKE ANDES SD
2010-11-09 605-836-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON SD
2010-11-09 605-841-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINNER SD
2010-11-05 605-202-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F VERMILLION SD
2010-11-05 605-215-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2010-10-26 605-413-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 SIOUX FLS SD
2010-10-26 605-551-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRITTON SD
2010-10-26 605-569-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SD 5180 BELLEFORCH SD
2010-10-26 605-613-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLATTE SD
2010-10-26 605-844-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLARK SD
2010-10-26 605-899-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARTIN SD
2010-10-26 605-926-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MOBRIDGE SD
2010-10-26 605-927-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SISSETON SD
2010-10-19 605-269-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPEARFISH SD
2010-10-19 605-319-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION SD
2010-10-19 605-569-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLEFORCH SD
2010-10-18 605-540-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J NOSIOUX CY SD
2010-10-15 605-202-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VERMILLION SD
2010-10-15 605-214-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HARISBGTEA SD
2010-10-15 605-220-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PIERRE SD
2010-10-15 605-252-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABERDEEN SD
2010-10-15 605-291-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MADISON SD
2010-10-15 605-299-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MITCHELL SD
2010-10-15 605-412-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HURON SD
2010-10-15 605-467-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILBANK SD
2010-10-15 605-478-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HIGHMORE SD
2010-10-15 605-505-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PARKSTON SD
2010-10-15 605-592-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROOKINGS SD
2010-10-15 605-734-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAMBERLAN SD
2010-10-15 605-760-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YANKTON SD
2010-10-15 605-924-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 MILBANK SD
2010-10-15 605-956-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERTOWN SD
2010-10-14 605-939-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2010-09-27 605-939-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2010-09-10 605-215-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SIOUX FLS SD
2010-09-10 605-252-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F ABERDEEN SD
2010-09-10 605-299-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F MITCHELL SD
2010-09-10 605-340-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F SPEARFISH SD
2010-09-10 605-412-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F HURON SD
2010-09-10 605-653-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F YANKTON SD
2010-09-10 605-956-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F WATERTOWN SD
2010-09-08 605-944-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARTIN SD
2010-09-03 605-789-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX FLS SD
2010-08-10 605-202-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F VERMILLION SD
2010-08-09 605-787-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - SD 106F RAPID CITY SD
2010-08-06 605-304-1XXX 1000–1999Assigned MCC TELEPHONY OF THE MID-WEST, LLC - SD 920F WHITE 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.