NumberResearchThousands-blocks in 575-383
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 575-383 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 575 blocks
Most active assignees, all time — NPA 575
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
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Apr 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-09-10 | 575-383-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | RATON | NM |
| — | 575-383-1XXX | 1000–1999 | Available | RATON | NM | ||
| 2023-07-11 | 575-383-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | RATON | NM |
| 2013-11-25 | 575-383-3XXX | 3000–3999 | Assigned | ONVOY, LLC - NM | 206F | RATON | NM |
| 2015-07-29 | 575-383-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - NM | 123F | RATON | NM |
| 2016-03-01 | 575-383-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NM | 206F | RATON | NM |
| 2012-12-14 | 575-383-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA NM-LLC | 450C | RATON | NM |
| 2013-11-25 | 575-383-7XXX | 7000–7999 | Assigned | ONVOY, LLC - NM | 206F | RATON | NM |
| 2013-11-26 | 575-383-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM | 7464 | RATON | NM |
| 2016-03-01 | 575-383-9XXX | 9000–9999 | Assigned | ONVOY, LLC - NM | 206F | RATON | NM |
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.