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
2014-03-18 319-800-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2014-03-07 319-449-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2014-03-07 319-449-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2014-03-06 319-327-3XXX 3000–3999Assigned UNITED STATES CELLULAR - IA 6266 INDEPNDNCE IA
2014-02-25 319-201-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 MTPLEASANT IA
2014-02-25 319-462-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 ANAMOSA IA
2014-02-12 319-440-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2014-02-12 319-850-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 BURLINGTON IA
2014-02-03 319-243-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 CEDARFALLS IA
2014-01-24 319-212-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COLUMBSJCT IA
2014-01-14 319-343-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CENTER PT IA
2014-01-07 319-823-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 GRUNDY CTR IA
2013-12-26 319-766-0XXX 0000–0999Assigned AUREON COMMUNICATIONS, LLC 444G OAKVILLE IA
2013-12-13 319-214-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 VINTON IA
2013-12-06 319-671-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BURLINGTON IA
2013-11-15 319-774-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CEDAR RPDS IA
2013-11-13 319-435-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F COGGON IA
2013-11-13 319-435-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F COGGON IA
2013-11-13 319-472-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F VINTON IA
2013-11-13 319-472-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F VINTON IA
2013-11-13 319-535-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MT VERNON IA
2013-11-13 319-535-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F MT VERNON IA
2013-11-13 319-669-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F FT MADISON IA
2013-11-13 319-669-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F FT MADISON IA
2013-11-13 319-988-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F HUDSON IA
2013-11-13 319-988-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F HUDSON IA
2013-11-08 319-343-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F CENTER PT IA
2013-11-08 319-343-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F CENTER PT IA
2013-11-08 319-462-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F ANAMOSA IA
2013-11-08 319-481-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F ANAMOSA IA
2013-11-08 319-575-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F CEDARFALLS IA
2013-11-08 319-575-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CEDARFALLS IA
2013-10-30 319-520-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 KEOKUK IA
2013-10-04 319-371-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 FT MADISON IA
2013-09-06 319-505-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WATERLOO IA
2013-09-05 319-505-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2013-08-16 319-382-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2013-08-16 319-383-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2013-08-16 319-486-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2013-08-08 319-359-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E IOWA CITY IA
2013-07-31 319-359-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2013-07-31 319-499-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2013-07-03 319-693-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2013-07-02 319-550-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2013-06-25 319-505-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2013-06-21 319-661-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G WILLIAMSBG IA
2013-06-19 319-444-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 BELLEPLAIN IA
2013-06-19 319-774-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CEDAR RPDS IA
2013-06-17 319-505-2XXX 2000–2999Assigned MCC TELEPHONY LLC 593K WATERLOO IA
2013-05-28 319-382-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS 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.