NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 319-471

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 319-471 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 319 blocks

Most active assignees, all time — NPA 319
T-MOBILE USA, INC. 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 3
NEW CINGULAR WIRELESS PCS, LLC - IL 2
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1
COMMIO, LLC 1
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
2008-02-15 319-471-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2006-08-01 319-471-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2007-10-15 319-471-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2007-03-19 319-471-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IOWA CITY IA
2007-02-08 319-471-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 IOWA CITY IA
2007-10-30 319-471-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IOWA CITY IA
2007-03-28 319-471-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 IOWA CITY IA
2007-03-28 319-471-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 IOWA CITY IA
2006-10-12 319-471-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 IOWA CITY IA
2024-01-31 319-471-9XXX 9000–9999Assigned COMMIO, LLC 939H 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.