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
2016-07-29 319-299-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 BELLEPLAIN IA
2016-07-15 319-450-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2016-07-15 319-536-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2016-07-15 319-536-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2016-07-15 319-777-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2016-07-14 319-201-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 MTPLEASANT IA
2016-07-11 319-519-6XXX 6000–6999Assigned IMON COMMUNICATIONS, LLC - IA 695G IOWA CITY IA
2016-07-05 319-576-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BURLINGTON IA
2016-06-30 319-252-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERLOO IA
2016-06-30 319-252-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERLOO IA
2016-06-24 319-519-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2016-06-23 319-201-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MTPLEASANT IA
2016-06-21 319-320-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2016-06-21 319-575-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDARFALLS IA
2016-06-20 319-284-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E OELWEIN IA
2016-06-15 319-519-2XXX 2000–2999Assigned MCC TELEPHONY LLC 593K IOWA CITY IA
2016-05-25 319-349-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERLOO IA
2016-05-17 319-320-7XXX 7000–7999Assigned MCC TELEPHONY LLC 593K CEDAR RPDS IA
2016-04-29 319-320-6XXX 6000–6999Assigned MCC TELEPHONY LLC 593K CEDAR RPDS IA
2016-04-27 319-559-7XXX 7000–7999Assigned UNITED STATES CELLULAR - IA 6266 WAVERLY IA
2016-04-27 319-559-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 WAVERLY IA
2016-04-18 319-777-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2016-04-18 319-777-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2016-04-18 319-777-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2016-04-13 319-800-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 IOWA CITY IA
2016-04-12 319-318-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E VINTON IA
2016-04-12 319-576-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E BURLINGTON IA
2016-04-11 319-229-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2016-04-05 319-349-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2016-04-05 319-349-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2016-03-30 319-320-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2016-03-17 319-519-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2016-03-16 319-449-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CEDAR RPDS IA
2016-03-16 319-575-2XXX 2000–2999Assigned UNITED STATES CELLULAR - IA 6266 CEDARFALLS IA
2016-03-15 319-318-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F VINTON IA
2016-03-15 319-318-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F VINTON IA
2016-03-15 319-727-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F COGGON IA
2016-03-15 319-727-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F COGGON IA
2016-03-15 319-844-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F MONTICELLO IA
2016-03-15 319-844-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F MONTICELLO IA
2016-03-15 319-984-0XXX 0000–0999Assigned ONVOY, LLC - IA 221F DENVER IA
2016-03-15 319-984-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F DENVER IA
2016-03-15 319-989-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F PARKERSBG IA
2016-03-15 319-989-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F PARKERSBG IA
2016-03-14 319-975-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 ANAMOSA IA
2016-03-10 319-349-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2016-03-10 319-349-2XXX 2000–2999Assigned ONVOY, LLC - IA 221F WATERLOO IA
2016-03-10 319-601-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F BURLINGTON IA
2016-03-10 319-601-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F BURLINGTON IA
2016-03-09 319-519-0XXX 0000–0999Assigned 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.