NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

12 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 319
ONVOY, LLC - IA 6
T-MOBILE USA, INC. 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 2
BANDWIDTH.COM CLEC, LLC - IA 2
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
2021-10-05 319-380-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BURLINGTON IA
2021-10-05 319-601-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H BURLINGTON IA
2021-10-05 319-732-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H KEOKUK IA
2021-10-05 319-867-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H IOWA CITY IA
2021-10-05 319-867-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H IOWA CITY IA
2021-10-05 319-867-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H IOWA CITY IA
2021-10-05 319-867-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H IOWA CITY IA
2021-10-01 319-254-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F OLDS IA
2021-10-01 319-255-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F COLUMBSJCT IA
2021-09-30 319-444-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F BELLEPLAIN IA
2021-09-30 319-585-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F HAZLETON IA
2021-09-30 319-635-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F FAIRBANK IA
2021-09-30 319-662-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F CONROY IA
2021-09-30 319-823-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F GRUNDY CTR IA
2021-09-27 319-261-8XXX 8000–8999Assigned AIRUS, INC - IA 423H CEDAR RPDS IA
2021-09-27 319-379-0XXX 0000–0999Assigned AIRUS, INC - IA 423H IOWA CITY IA
2021-09-20 319-379-1XXX 1000–1999Assigned METROPCS, INC. 5562 IOWA CITY IA
2021-09-20 319-628-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F OXFORD IA
2021-09-20 319-657-0XXX 0000–0999Assigned AUREON COMMUNICATIONS, LLC 444G AINSWORTH IA
2021-09-16 319-323-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F OELWEIN IA
2021-09-16 319-323-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F OELWEIN IA
2021-09-14 319-853-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 NO LIBERTY IA
2021-09-10 319-257-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F WINFIELD IA
2021-08-27 319-445-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F REINBECK IA
2021-08-27 319-478-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F TRAER IA
2021-08-27 319-628-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F OXFORD IA
2021-08-27 319-635-8XXX 8000–8999Assigned AUREON COMMUNICATIONS, LLC 444G FAIRBANK IA
2021-08-27 319-644-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F SOLON IA
2021-08-27 319-661-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F WILLIAMSBG IA
2021-08-27 319-824-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F GRUNDY CTR IA
2021-08-27 319-839-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MARENGO IA
2021-08-27 319-933-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F JANESVILLE IA
2021-08-25 319-299-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F BELLEPLAIN IA
2021-08-25 319-315-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F ANAMOSA IA
2021-08-25 319-315-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F ANAMOSA IA
2021-08-25 319-347-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F APLINGTON IA
2021-08-25 319-387-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CENTRAL CY IA
2021-08-04 319-253-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F HILLSBORO IA
2021-08-04 319-344-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F COLUMBSJCT IA
2021-08-04 319-549-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F OLDS IA
2021-08-04 319-619-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MONTROSE IA
2021-07-16 319-315-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ANAMOSA IA
2021-07-06 319-300-6XXX 6000–6999Assigned STRATUS NETWORKS 495J WATERLOO IA
2021-06-24 319-381-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H IOWA CITY IA
2021-06-23 319-619-9XXX 9000–9999Assigned METROPCS, INC. 5562 MONTROSE IA
2021-06-22 319-255-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COLUMBSJCT IA
2021-06-21 319-315-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ANAMOSA IA
2021-06-21 319-370-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H COGGON IA
2021-06-21 319-387-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H CENTRAL CY IA
2021-06-18 319-302-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CENTER PT 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.