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
2018-05-01 319-635-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNCATIONS, LLC - IA 544H FAIRBANK IA
2018-05-01 319-662-0XXX 0000–0999Assigned INTEGRATED PATH COMMUNCATIONS, LLC - IA 544H CONROY IA
2018-05-01 319-727-2XXX 2000–2999Assigned INTEGRATED PATH COMMUNCATIONS, LLC - IA 544H COGGON IA
2018-05-01 319-839-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNCATIONS, LLC - IA 544H MARENGO IA
2018-05-01 319-987-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNCATIONS, LLC - IA 544H JANESVILLE IA
2018-04-30 319-775-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2018-04-09 319-412-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2018-03-22 319-206-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2018-03-22 319-206-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2018-03-22 319-654-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2018-03-22 319-654-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2018-03-21 319-259-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 IOWA CITY IA
2018-03-20 319-271-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F INDEPNDNCE IA
2018-03-20 319-281-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F HUDSON IA
2018-03-19 319-412-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2018-03-19 319-412-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2018-03-19 319-412-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2018-03-19 319-412-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2018-03-19 319-412-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2018-03-15 319-264-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F OELWEIN IA
2018-03-15 319-318-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F VINTON IA
2018-03-14 319-406-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F DENVER IA
2018-03-14 319-677-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2018-03-14 319-677-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2018-03-13 319-460-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2018-03-13 319-460-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IA
2018-03-13 319-576-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BURLINGTON IA
2018-03-13 319-576-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BURLINGTON IA
2018-03-12 319-419-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WAVERLY IA
2018-03-12 319-419-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WAVERLY IA
2018-03-12 319-839-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MARENGO IA
2018-03-08 319-720-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2018-03-07 319-259-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 IOWA CITY IA
2018-03-07 319-259-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 IOWA CITY IA
2018-03-07 319-722-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WILLIAMSBG IA
2018-03-07 319-888-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2018-03-07 319-888-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2018-03-06 319-201-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MTPLEASANT IA
2018-03-06 319-201-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MTPLEASANT IA
2018-03-06 319-520-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KEOKUK IA
2018-03-06 319-669-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FT MADISON IA
2018-03-06 319-669-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FT MADISON IA
2018-03-05 319-569-2XXX 2000–2999Assigned MCC TELEPHONY LLC 593K IOWA CITY IA
2018-03-01 319-671-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 BURLINGTON IA
2018-02-22 319-835-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DONNELLSON IA
2018-02-13 319-438-3XXX 3000–3999Assigned SHELLSBURG CABLEVISION, INC. - IA 527G CENTRAL CY IA
2018-02-12 319-412-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2018-02-09 319-252-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2018-02-09 319-252-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2018-02-09 319-349-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO 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.