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
2017-06-07 515-859-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ALDEN IA
2017-06-06 515-325-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BLAIRSBURG IA
2017-06-06 515-348-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2017-06-06 515-735-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J AMES IA
2017-05-31 515-715-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AMES IA
2017-05-31 515-715-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AMES IA
2017-05-31 515-715-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AMES IA
2017-05-09 515-236-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E BOONE IA
2017-05-03 515-348-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DES MOINES IA
2017-05-02 515-715-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F AMES IA
2017-04-26 515-348-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F DES MOINES IA
2017-04-21 515-606-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F WEBSTER CY IA
2017-04-21 515-606-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F WEBSTER CY IA
2017-04-11 515-348-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DES MOINES IA
2017-04-10 515-709-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOONE IA
2017-04-06 515-601-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-04-06 515-601-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-04-06 515-601-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-04-06 515-721-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-29 515-531-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRANGER IA
2017-03-24 515-293-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G EAGLEGROVE IA
2017-03-24 515-532-4XXX 4000–4999Assigned AUREON COMMUNICATIONS, LLC 444G CLARION IA
2017-03-22 515-348-0XXX 0000–0999Assigned INTEGRATED PATH COMMUNCATIONS, LLC - IA 544H DES MOINES IA
2017-03-21 515-336-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-21 515-380-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-21 515-380-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-21 515-380-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-21 515-380-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-21 515-380-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-21 515-380-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-21 515-380-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-21 515-776-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-21 515-776-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2017-03-08 515-500-0XXX 0000–0999Assigned INTEGRATED PATH COMMUNCATIONS, LLC - IA 544H BOONE IA
2017-03-06 515-310-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E JEWELL IA
2017-03-02 515-219-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ADEL IA
2017-03-02 515-552-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J INDIANOLA IA
2017-02-28 515-368-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HUMBOLDT IA
2017-02-28 515-373-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GILMORE CY IA
2017-02-28 515-738-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRAND JCT IA
2017-02-27 515-206-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FORT DODGE IA
2017-02-27 515-585-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VAN METER IA
2017-02-27 515-606-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WEBSTER CY IA
2017-02-27 515-679-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WESLEY IA
2017-02-27 515-705-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WINTERSET IA
2017-02-27 515-854-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WILLIAMS IA
2017-02-24 515-335-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STORY CITY IA
2017-02-24 515-454-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STUART IA
2017-02-24 515-477-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SWEA CITY IA
2017-02-23 515-388-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROLAND 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.