NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 319-304

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 319-304 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 4
ONVOY, LLC - IA 3
UNITED STATES CELLULAR - IA 1
CSC WIRELESS, LLC 1
BANDWIDTH.COM CLEC, LLC - IA 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
2021-03-29 319-304-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2023-08-14 319-304-1XXX 1000–1999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2020-07-23 319-304-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J CEDAR RPDS IA
2021-02-15 319-304-3XXX 3000–3999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2021-02-15 319-304-4XXX 4000–4999Assigned ONVOY, LLC - IA 221F CEDAR RPDS IA
2020-09-24 319-304-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2020-09-24 319-304-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2022-10-07 319-304-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
2022-06-13 319-304-8XXX 8000–8999Assigned UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
2022-09-01 319-304-9XXX 9000–9999Assigned 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.