NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 515
ONVOY, LLC - IA 5
AUREON COMMUNICATIONS, LLC 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 1
BANDWIDTH.COM CLEC, LLC - IA 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
2015-03-26 515-444-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2015-03-26 515-444-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2015-03-10 515-200-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ALGONA IA
2015-03-10 515-305-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2015-03-10 515-305-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2015-03-10 515-512-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2015-03-06 515-305-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2015-03-06 515-305-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2015-02-10 515-985-7XXX 7000–7999Assigned AUREON COMMUNICATIONS, LLC 444G DES MOINES IA
2015-02-09 515-639-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2015-02-09 515-639-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2015-02-09 515-639-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2015-01-27 515-631-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2015-01-22 515-735-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AMES IA
2015-01-21 515-297-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WEBSTER CY IA
2015-01-21 515-379-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E LIVERMORE IA
2015-01-20 515-808-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E INDIANOLA IA
2015-01-19 515-631-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2015-01-19 515-631-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2014-12-31 515-203-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 AMES IA
2014-12-16 515-215-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 NEVADA IA
2014-12-12 515-518-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2014-12-12 515-518-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2014-12-12 515-518-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2014-12-03 515-735-7XXX 7000–7999Assigned QWEST CORPORATION 9631 AMES IA
2014-12-02 515-478-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 ADEL IA
2014-12-01 515-631-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2014-12-01 515-631-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2014-11-13 515-302-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORT DODGE IA
2014-11-12 515-207-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2014-11-12 515-346-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2014-11-12 515-446-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2014-11-12 515-446-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2014-11-12 515-446-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2014-11-12 515-512-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2014-11-12 515-518-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2014-11-12 515-518-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2014-11-12 515-518-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E DES MOINES IA
2014-11-03 515-293-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E EAGLEGROVE IA
2014-10-20 515-236-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 BOONE IA
2014-10-20 515-825-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IA 6266 GOLDFIELD IA
2014-10-17 515-446-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2014-10-17 515-446-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2014-10-13 515-598-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F AMES IA
2014-10-10 515-468-4XXX 4000–4999Assigned AUREON COMMUNICATIONS, LLC 444G WINTERSET IA
2014-10-10 515-808-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G INDIANOLA IA
2014-10-02 515-639-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2014-10-02 515-639-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2014-09-19 515-985-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2014-09-19 515-985-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA

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.