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
2008-11-11 319-855-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2008-11-10 319-432-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2008-10-30 319-214-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E VINTON IA
2008-10-30 319-224-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E TROY MILLS IA
2008-10-30 319-244-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ELY IA
2008-10-30 319-322-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E NORWAY IA
2008-10-30 319-328-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E NEWHALL IA
2008-10-30 319-435-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E COGGON IA
2008-10-30 319-438-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CENTRAL CY IA
2008-10-30 319-448-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WALKER IA
2008-10-30 319-455-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E LISBON IA
2008-10-30 319-481-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E ANAMOSA IA
2008-10-30 319-535-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E MT VERNON IA
2008-10-30 319-849-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CENTER PT IA
2008-10-30 319-853-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E NO LIBERTY IA
2008-10-28 319-327-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 INDEPNDNCE IA
2008-10-16 319-668-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 WILLIAMSBG IA
2008-10-01 319-693-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2008-09-11 319-242-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 CEDARFALLS IA
2008-09-11 319-631-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2008-09-09 319-855-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2008-08-22 319-465-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F MONTICELLO IA
2008-08-07 319-427-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2008-08-05 319-406-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F DENVER IA
2008-08-05 319-435-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F COGGON IA
2008-08-05 319-538-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2008-08-05 319-538-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2008-08-05 319-849-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CENTER PT IA
2008-08-05 319-895-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MT VERNON IA
2008-08-05 319-988-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F HUDSON IA
2008-07-25 319-432-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2008-07-22 319-538-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2008-07-17 319-427-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2008-07-15 319-538-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2008-07-03 319-538-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2008-06-17 319-631-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2008-06-02 319-538-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2008-05-30 319-491-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2008-05-29 319-775-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2008-05-01 319-429-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2008-04-30 319-591-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 WASHINGTON IA
2008-04-10 319-215-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERLOO IA
2008-03-28 319-429-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2008-03-28 319-654-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2008-03-18 319-538-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2008-02-19 319-400-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2008-02-19 319-491-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2008-02-18 319-429-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2008-02-15 319-471-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2008-01-31 319-214-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F VINTON 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.