NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

9 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2020-10-21 515-501-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F MAXWELL IA
2020-10-21 515-506-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F ADEL IA
2020-10-21 515-506-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F ADEL IA
2020-10-21 515-513-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2020-10-21 515-513-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2020-10-21 515-513-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2020-10-21 515-513-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2020-10-21 515-516-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F BLAIRSBURG IA
2020-10-21 515-517-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F EARLHAM IA
2020-10-21 515-526-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F REDFIELD IA
2020-10-21 515-529-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F COLFAX IA
2020-10-21 515-529-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F COLFAX IA
2020-10-21 515-531-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F GRANGER IA
2020-10-21 515-582-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F MADRID IA
2020-10-21 515-600-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F LUVERNE IA
2020-10-21 515-642-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F PERRY IA
2020-10-21 515-654-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F WEBSTER CY IA
2020-10-21 515-676-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F BOUTON IA
2020-10-21 515-676-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F BOUTON IA
2020-10-21 515-685-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F SLATER IA
2020-10-21 515-738-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F GRAND JCT IA
2020-10-21 515-750-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F DAWSON IA
2020-10-21 515-750-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F DAWSON IA
2020-10-21 515-755-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F WESLEY IA
2020-10-21 515-762-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F RUNNELLS IA
2020-10-21 515-762-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F RUNNELLS IA
2020-10-21 515-766-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F AMES IA
2020-10-21 515-766-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F AMES IA
2020-10-21 515-786-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F OTHO IA
2020-10-21 515-789-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F DEXTER IA
2020-10-21 515-834-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F DE SOTO IA
2020-10-21 515-842-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F VAN METER IA
2020-10-21 515-852-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F DOWS IA
2020-10-21 515-855-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F BUCKEYE IA
2020-10-21 515-855-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F BUCKEYE IA
2020-10-21 515-877-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F POLK CITY IA
2020-10-21 515-900-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F BOONE IA
2020-10-21 515-900-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F BOONE IA
2020-10-21 515-902-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F HUMBOLDT IA
2020-10-21 515-949-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F EAGLEGROVE IA
2020-10-20 515-895-8XXX 8000–8999Assigned TWILIO INTERNATIONAL, INC. 506J DES MOINES IA
2020-10-15 515-690-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F INDIANOLA IA
2020-10-15 515-690-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F INDIANOLA IA
2020-09-20 515-900-5XXX 5000–5999Assigned METROPCS, INC. 5562 BOONE IA
2020-09-19 515-495-1XXX 1000–1999Assigned AUREON COMMUNICATIONS, LLC 444G PRAIRIE CY IA
2020-09-16 515-738-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND JCT IA
2020-09-16 515-859-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALDEN IA
2020-09-03 515-842-5XXX 5000–5999Assigned FRACTEL, LLC 965H VAN METER IA
2020-08-19 515-666-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DES MOINES IA
2020-08-19 515-690-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E INDIANOLA IA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.