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
2016-10-31 515-776-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-10-06 515-575-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALGONA IA
2016-09-30 515-300-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-09-30 515-300-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-09-30 515-300-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-09-30 515-300-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-09-30 515-300-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-09-30 515-300-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-09-13 515-336-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-09-13 515-336-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-09-13 515-723-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-09-06 515-300-2XXX 2000–2999Assigned QWEST CORPORATION 9631 DES MOINES IA
2016-09-06 515-300-3XXX 3000–3999Assigned QWEST CORPORATION 9631 DES MOINES IA
2016-09-02 515-715-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AMES IA
2016-08-30 515-381-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DES MOINES IA
2016-08-30 515-381-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DES MOINES IA
2016-08-26 515-715-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AMES IA
2016-08-22 515-601-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2016-08-22 515-601-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2016-08-22 515-601-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2016-08-22 515-601-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2016-08-16 515-552-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 INDIANOLA IA
2016-08-10 515-215-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 NEVADA IA
2016-08-03 515-723-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-08-03 515-723-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-08-03 515-739-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 WINTERSET IA
2016-07-27 515-582-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 MADRID IA
2016-07-15 515-723-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-07-15 515-723-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-07-15 515-723-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-07-15 515-723-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-07-15 515-723-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-07-15 515-723-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-07-15 515-723-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-06-28 515-348-6XXX 6000–6999Assigned AUREON COMMUNICATIONS, LLC 444G DES MOINES IA
2016-06-21 515-832-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WEBSTER CY IA
2016-06-20 515-715-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 AMES IA
2016-06-20 515-739-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WINTERSET IA
2016-06-20 515-851-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLARION IA
2016-06-03 515-350-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2016-06-03 515-350-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-06-03 515-350-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2016-06-03 515-350-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2016-06-03 515-350-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2016-06-03 515-709-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOONE IA
2016-05-23 515-350-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 DES MOINES IA
2016-05-23 515-350-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 DES MOINES IA
2016-05-23 515-350-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 DES MOINES IA
2016-05-20 515-835-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WEBSTER CY IA
2016-05-06 515-236-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 BOONE 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.