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
2023-03-06 319-451-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CEDAR RPDS IA
2023-02-17 319-391-1XXX 1000–1999Assigned NUSO, LLC 732J CEDAR RPDS IA
2023-02-15 319-652-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 TRAER IA
2023-02-15 319-839-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MARENGO IA
2023-02-15 319-922-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALEM IA
2023-02-15 319-922-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALEM IA
2023-02-09 319-995-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 WINFIELD IA
2023-02-02 319-508-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2023-02-02 319-508-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2023-02-02 319-508-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2023-02-02 319-508-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2023-02-02 319-508-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2023-01-24 319-307-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DUNKERTON IA
2023-01-24 319-309-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 GUERNSEY IA
2023-01-24 319-314-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 READLYN IA
2023-01-10 319-381-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2023-01-10 319-661-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 WILLIAMSBG IA
2022-12-28 319-820-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G MONTICELLO IA
2022-12-15 319-281-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 HUDSON IA
2022-12-15 319-303-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DENVER IA
2022-12-15 319-305-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MT VERNON IA
2022-12-15 319-422-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 PARKERSBG IA
2022-12-15 319-441-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CENTER PT IA
2022-12-12 319-451-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2022-12-07 319-259-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2022-12-06 319-922-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F SALEM IA
2022-11-28 319-719-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F VINTON IA
2022-11-28 319-719-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F VINTON IA
2022-11-22 319-508-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2022-11-22 319-508-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2022-11-17 319-942-0XXX 0000–0999Assigned COMMIO, LLC 939H HILLSBORO IA
2022-10-26 319-306-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 JESUP IA
2022-10-26 319-995-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F WINFIELD IA
2022-10-24 319-636-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 HAZLETON IA
2022-10-21 319-264-5XXX 5000–5999Assigned COMMIO, LLC 939H OELWEIN IA
2022-10-21 319-500-1XXX 1000–1999Assigned COMMIO, LLC 939H VINTON IA
2022-10-19 319-451-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2022-10-18 319-451-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2022-10-17 319-246-9XXX 9000–9999Assigned COMMIO, LLC 939H FT MADISON IA
2022-10-17 319-315-8XXX 8000–8999Assigned COMMIO, LLC 939H ANAMOSA IA
2022-10-17 319-421-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 SHELL ROCK IA
2022-10-17 319-734-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2022-10-17 319-893-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2022-10-13 319-893-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CEDAR RPDS IA
2022-10-07 319-304-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2022-10-07 319-317-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2022-10-07 319-662-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 CONROY IA
2022-10-07 319-893-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2022-09-27 319-319-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2022-09-27 319-319-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F IOWA CITY 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.