NumberResearchThousands-blocks in 319-300
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 319-300 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
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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-05-24 | 319-300-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | WATERLOO | IA |
| 2018-12-18 | 319-300-1XXX | 1000–1999 | Assigned | AIRUS, INC - IA | 423H | WATERLOO | IA |
| 2019-05-23 | 319-300-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | WATERLOO | IA |
| 2019-12-17 | 319-300-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WATERLOO | IA |
| 2019-06-14 | 319-300-4XXX | 4000–4999 | Assigned | MCC TELEPHONY LLC | 593K | WATERLOO | IA |
| 2019-06-05 | 319-300-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | WATERLOO | IA |
| 2021-07-06 | 319-300-6XXX | 6000–6999 | Assigned | STRATUS NETWORKS | 495J | WATERLOO | IA |
| 2019-08-22 | 319-300-7XXX | 7000–7999 | Assigned | ONVOY, LLC - IA | 221F | WATERLOO | IA |
| 2026-03-04 | 319-300-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WATERLOO | IA |
| 2018-08-28 | 319-300-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | WATERLOO | IA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.