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
2010-11-01 319-450-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2010-10-21 319-217-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MTPLEASANT IA
2010-10-15 319-450-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2010-10-11 319-670-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KEOKUK IA
2010-10-04 319-423-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2010-10-04 319-423-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2010-09-17 319-693-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR RPDS IA
2010-09-13 319-883-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WATERLOO IA
2010-09-08 319-208-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E BURLINGTON IA
2010-09-08 319-242-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDARFALLS IA
2010-09-08 319-246-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E FT MADISON IA
2010-09-08 319-313-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E KEOKUK IA
2010-09-08 319-883-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WATERLOO IA
2010-09-07 319-423-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2010-09-02 319-529-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2010-08-27 319-333-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2010-08-24 319-423-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2010-08-23 319-333-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2010-08-11 319-333-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E IOWA CITY IA
2010-08-11 319-483-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WAVERLY IA
2010-08-06 319-423-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2010-07-14 319-804-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2010-07-14 319-804-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2010-07-07 319-201-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 MTPLEASANT IA
2010-07-07 319-243-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 CEDARFALLS IA
2010-07-07 319-423-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2010-07-02 319-423-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2010-06-29 319-284-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OELWEIN IA
2010-06-10 319-883-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2010-06-03 319-208-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E BURLINGTON IA
2010-06-03 319-242-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDARFALLS IA
2010-06-03 319-246-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E FT MADISON IA
2010-06-03 319-313-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E KEOKUK IA
2010-06-03 319-427-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WATERLOO IA
2010-06-03 319-693-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2010-06-03 319-693-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2010-06-03 319-855-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E IOWA CITY IA
2010-05-24 319-432-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2010-05-24 319-930-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2010-05-06 319-423-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 CEDAR RPDS IA
2010-05-06 319-427-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WATERLOO IA
2010-05-06 319-855-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E IOWA CITY IA
2010-05-04 319-540-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2010-03-23 319-312-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K DYSART IA
2010-03-19 319-203-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K SWISHER IA
2010-03-19 319-285-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K SHARON CTR IA
2010-03-19 319-333-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K IOWA CITY IA
2010-03-19 319-779-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K KALONA IA
2010-03-19 319-844-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K MONTICELLO IA
2010-03-18 319-883-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 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.