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
2023-05-15 515-304-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2023-05-15 515-304-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2023-05-15 515-304-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2023-05-09 515-307-1XXX 1000–1999Assigned MCC TELEPHONY OF IOWA, LLC - IA 751F WILLIAMS IA
2023-05-09 515-425-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F AMES IA
2023-05-03 515-862-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J STORY CITY IA
2023-05-03 515-900-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BOONE IA
2023-04-12 515-706-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F DES MOINES IA
2023-04-10 515-862-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 STORY CITY IA
2023-04-10 515-895-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2023-04-10 515-895-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2023-04-10 515-895-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2023-04-03 515-706-0XXX 0000–0999Assigned AIRUS, INC - IA 423H DES MOINES IA
2023-04-03 515-916-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J AMES IA
2023-03-07 515-304-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DES MOINES IA
2023-03-06 515-644-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DES MOINES IA
2023-02-22 515-366-0XXX 0000–0999Assigned AUREON COMMUNICATIONS, LLC 444G DEXTER IA
2023-02-22 515-425-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H AMES IA
2023-02-17 515-301-1XXX 1000–1999Assigned NUSO, LLC 732J AMES IA
2023-02-10 515-862-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 STORY CITY IA
2023-01-31 515-904-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H DES MOINES IA
2023-01-30 515-220-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CAMBRIDGE IA
2023-01-30 515-582-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J MADRID IA
2023-01-30 515-934-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J NEVADA IA
2023-01-24 515-626-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 BOONE IA
2023-01-18 515-904-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DES MOINES IA
2023-01-06 515-526-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F REDFIELD IA
2022-12-15 515-377-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 EARLHAM IA
2022-12-15 515-405-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 RENWICK IA
2022-12-15 515-466-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 WHITTEMORE IA
2022-12-15 515-489-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 JEWELL IA
2022-12-15 515-529-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 COLFAX IA
2022-12-15 515-534-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 STUART IA
2022-12-15 515-550-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 BRADGATE IA
2022-12-15 515-565-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 LIVERMORE IA
2022-12-15 515-600-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 LUVERNE IA
2022-12-15 515-622-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GILMORE CY IA
2022-12-15 515-716-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 PRAIRIE CY IA
2022-12-15 515-755-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 WESLEY IA
2022-12-15 515-784-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DAWSON IA
2022-12-15 515-842-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 VAN METER IA
2022-12-15 515-969-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DALLAS CTR IA
2022-12-12 515-384-4XXX 4000–4999Assigned METROPCS, INC. 5562 WINTERSET IA
2022-12-07 515-355-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F WILLIAMS IA
2022-12-06 515-581-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ADEL IA
2022-12-06 515-762-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 RUNNELLS IA
2022-12-06 515-877-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 POLK CITY IA
2022-12-06 515-915-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GRANGER IA
2022-11-29 515-415-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DES MOINES IA
2022-11-25 515-228-7XXX 7000–7999Assigned AUREON COMMUNICATIONS, LLC 444G SLATER 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.