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
2021-12-08 319-789-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-08 319-789-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-08 319-789-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-08 319-789-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-08 319-789-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-08 319-789-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-08 319-789-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-08 319-789-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-08 319-789-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-08 319-863-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2021-12-02 319-388-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DONNELLSON IA
2021-12-02 319-893-8XXX 8000–8999Assigned TWILIO INTERNATIONAL, INC. 506J CEDAR RPDS IA
2021-12-01 319-367-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 NEW LONDON IA
2021-12-01 319-528-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DENMARK IA
2021-11-24 319-549-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F OLDS IA
2021-11-23 319-884-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F APLINGTON IA
2021-11-22 319-387-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CENTRAL CY IA
2021-11-21 319-619-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MONTROSE IA
2021-11-19 319-549-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OLDS IA
2021-11-18 319-305-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F MT VERNON IA
2021-11-18 319-305-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F MT VERNON IA
2021-11-18 319-738-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KESWICK IA
2021-11-18 319-884-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 APLINGTON IA
2021-11-17 319-344-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F COLUMBSJCT IA
2021-11-12 319-299-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F BELLEPLAIN IA
2021-11-09 319-381-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2021-11-09 319-422-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F PARKERSBG IA
2021-11-09 319-422-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F PARKERSBG IA
2021-11-04 319-251-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ANAMOSA IA
2021-10-27 319-303-1XXX 1000–1999Assigned AUREON COMMUNICATIONS, LLC 444G DENVER IA
2021-10-27 319-305-1XXX 1000–1999Assigned AUREON COMMUNICATIONS, LLC 444G MT VERNON IA
2021-10-27 319-387-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F CENTRAL CY IA
2021-10-20 319-257-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F WINFIELD IA
2021-10-20 319-315-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F ANAMOSA IA
2021-10-20 319-315-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F ANAMOSA IA
2021-10-20 319-324-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F BRIGHTON IA
2021-10-20 319-326-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F INDEPNDNCE IA
2021-10-20 319-326-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F INDEPNDNCE IA
2021-10-19 319-217-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MTPLEASANT IA
2021-10-19 319-387-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CENTRAL CY IA
2021-10-19 319-387-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CENTRAL CY IA
2021-10-05 319-308-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H FT MADISON IA
2021-10-05 319-308-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H FT MADISON IA
2021-10-05 319-315-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ANAMOSA IA
2021-10-05 319-317-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CEDAR RPDS IA
2021-10-05 319-317-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CEDAR RPDS IA
2021-10-05 319-317-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CEDAR RPDS IA
2021-10-05 319-317-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CEDAR RPDS IA
2021-10-05 319-326-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H INDEPNDNCE IA
2021-10-05 319-370-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H COGGON 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.