NumberResearchThousands-blocks in 574-363
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
The ten 1,000-number thousand-blocks inside prefix 574-363 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 574 blocks
Most active assignees, all time — NPA 574
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 |
|---|---|---|---|---|---|---|---|
| 2021-06-07 | 574-363-0XXX | 0000–0999 | Assigned | ONVOY, LLC - IN | 097D | BOURBON | IN |
| 2010-06-18 | 574-363-1XXX | 1000–1999 | Assigned | MCC TELEPHONY OF THE MID-WEST, LLC - IN | 874F | BOURBON | IN |
| 2022-01-12 | 574-363-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IN | 105F | BOURBON | IN |
| 2021-08-05 | 574-363-3XXX | 3000–3999 | Assigned | ONVOY, LLC - IN | 097D | BOURBON | IN |
| 2024-05-22 | 574-363-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BOURBON | IN |
| — | 574-363-5XXX | 5000–5999 | Available | BOURBON | IN | ||
| 2017-01-20 | 574-363-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IN | 7314 | BOURBON | IN |
| 2022-02-01 | 574-363-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | BOURBON | IN |
| — | 574-363-8XXX | 8000–8999 | Available | BOURBON | IN | ||
| — | 574-363-9XXX | 9000–9999 | Available | BOURBON | IN |
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.