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
2021-01-15 319-552-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MTPLEASANT IA
2021-01-15 319-552-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MTPLEASANT IA
2021-01-11 319-264-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 OELWEIN IA
2021-01-06 319-348-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2021-01-06 319-348-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2021-01-06 319-379-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2021-01-06 319-379-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2021-01-06 319-379-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2020-12-22 319-381-1XXX 1000–1999Assigned STRATUS NETWORKS 495J IOWA CITY IA
2020-12-17 319-205-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F MT VERNON IA
2020-12-17 319-205-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F MT VERNON IA
2020-12-17 319-205-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F MT VERNON IA
2020-11-27 319-251-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 ANAMOSA IA
2020-11-27 319-469-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F HOUGHTON IA
2020-11-27 319-469-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F HOUGHTON IA
2020-11-25 319-380-1XXX 1000–1999Assigned STRATUS NETWORKS 495J BURLINGTON IA
2020-11-17 319-474-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F BRANDON IA
2020-11-17 319-474-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F BRANDON IA
2020-11-17 319-987-8XXX 8000–8999Assigned AUREON COMMUNICATIONS, LLC 444G JANESVILLE IA
2020-10-30 319-255-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F COLUMBSJCT IA
2020-10-30 319-255-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F COLUMBSJCT IA
2020-10-30 319-308-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F FT MADISON IA
2020-10-30 319-576-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F BURLINGTON IA
2020-10-30 319-671-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F BURLINGTON IA
2020-10-30 319-729-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F GRANDVIEW IA
2020-10-30 319-835-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F DONNELLSON IA
2020-10-30 319-878-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F FARMINGTON IA
2020-10-26 319-219-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F MTPLEASANT IA
2020-10-26 319-219-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F MTPLEASANT IA
2020-10-21 319-983-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J PARKERSBG IA
2020-10-12 319-666-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 CEDARFALLS IA
2020-10-09 319-344-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COLUMBSJCT IA
2020-10-09 319-344-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COLUMBSJCT IA
2020-09-29 319-379-8XXX 8000–8999Assigned HD CARRIER LLC 321J IOWA CITY IA
2020-09-29 319-379-9XXX 9000–9999Assigned HD CARRIER LLC 321J IOWA CITY IA
2020-09-29 319-386-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MEDIAPOLIS IA
2020-09-24 319-304-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2020-09-24 319-304-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2020-09-23 319-259-7XXX 7000–7999Assigned IMON COMMUNICATIONS, LLC - IA 695G IOWA CITY IA
2020-09-21 319-324-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRIGHTON IA
2020-09-20 319-206-8XXX 8000–8999Assigned METROPCS, INC. 5562 CEDAR RPDS IA
2020-09-18 319-258-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALEM IA
2020-09-18 319-881-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAPELLO IA
2020-09-16 319-218-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OLIN IA
2020-09-09 319-219-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MTPLEASANT IA
2020-09-09 319-219-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MTPLEASANT IA
2020-09-09 319-253-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F HILLSBORO IA
2020-09-09 319-367-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F NEW LONDON IA
2020-09-03 319-348-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2020-09-03 319-438-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F CENTRAL CY 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.