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
2012-11-14 319-359-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2012-11-14 319-359-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F IOWA CITY IA
2012-11-14 319-409-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2012-11-14 319-409-7XXX 7000–7999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2012-11-14 319-409-8XXX 8000–8999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2012-11-14 319-409-9XXX 9000–9999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2012-11-14 319-435-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F COGGON IA
2012-11-14 319-435-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F COGGON IA
2012-11-14 319-553-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F CEDARFALLS IA
2012-11-14 319-988-5XXX 5000–5999Assigned ONVOY, LLC - IA 221F HUDSON IA
2012-11-14 319-988-6XXX 6000–6999Assigned ONVOY, LLC - IA 221F HUDSON IA
2012-11-09 319-826-6XXX 6000–6999Assigned MCC TELEPHONY LLC 593K CEDAR RPDS IA
2012-11-07 319-382-1XXX 1000–1999Assigned NUSO, LLC 551G CEDAR RPDS IA
2012-10-19 319-409-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2012-10-19 319-409-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2012-10-19 319-409-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2012-10-19 319-409-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2012-09-25 319-505-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2012-09-25 319-768-6XXX 6000–6999Assigned UNITED STATES CELLULAR - IA 6266 BURLINGTON IA
2012-09-25 319-784-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2012-09-20 319-359-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2012-09-20 319-486-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2012-09-11 319-559-0XXX 0000–0999Assigned UNITED STATES CELLULAR - IA 6266 WAVERLY IA
2012-09-10 319-486-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 WATERLOO IA
2012-09-10 319-576-1XXX 1000–1999Assigned UNITED STATES CELLULAR - IA 6266 BURLINGTON IA
2012-09-04 319-826-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2012-08-30 319-486-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WATERLOO IA
2012-08-29 319-486-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E WATERLOO IA
2012-08-06 319-499-9XXX 9000–9999Assigned AUREON COMMUNICATIONS, LLC 444G IOWA CITY IA
2012-07-26 319-768-9XXX 9000–9999Assigned UNITED STATES CELLULAR - IA 6266 BURLINGTON IA
2012-07-26 319-826-4XXX 4000–4999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2012-07-19 319-243-5XXX 5000–5999Assigned UNITED STATES CELLULAR - IA 6266 CEDARFALLS IA
2012-07-17 319-536-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E CEDAR RPDS IA
2012-07-11 319-359-1XXX 1000–1999Assigned MCC TELEPHONY LLC 593K IOWA CITY IA
2012-07-10 319-678-0XXX 0000–0999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 319-678-1XXX 1000–1999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 319-678-2XXX 2000–2999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 319-678-3XXX 3000–3999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 319-678-4XXX 4000–4999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 319-678-5XXX 5000–5999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 319-678-6XXX 6000–6999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 319-678-7XXX 7000–7999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 319-678-8XXX 8000–8999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 319-678-9XXX 9000–9999Assigned QWEST CORPORATION 9631 IOWA CITY IA
2012-05-14 319-376-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 FT MADISON IA
2012-05-09 319-217-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MTPLEASANT IA
2012-05-04 319-435-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IA 985E COGGON IA
2012-04-11 319-499-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 IOWA CITY IA
2012-03-16 319-383-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2012-03-16 319-383-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 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.