NumberResearchThousands-blocks in 575-297
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 575-297 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
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 |
|---|---|---|---|---|---|---|---|
| 2014-09-17 | 575-297-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - NM | 123F | TRUTHCQNCS | NM |
| 2022-07-19 | 575-297-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | TRUTHCQNCS | NM |
| 2025-09-05 | 575-297-2XXX | 2000–2999 | Assigned | TDS BROADBAND SERVICE LLC | 641H | TRUTHCQNCS | NM |
| — | 575-297-3XXX | 3000–3999 | Available | TRUTHCQNCS | NM | ||
| 2008-02-19 | 575-297-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - NM | 123F | TRUTHCQNCS | NM |
| — | 575-297-5XXX | 5000–5999 | Available | TRUTHCQNCS | NM | ||
| 2020-03-30 | 575-297-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA NM-LLC | 450C | TRUTHCQNCS | NM |
| 2014-07-15 | 575-297-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | TRUTHCQNCS | NM |
| 2024-02-02 | 575-297-8XXX | 8000–8999 | Assigned | ONVOY, LLC - NM | 206F | TRUTHCQNCS | NM |
| 2009-04-22 | 575-297-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | TRUTHCQNCS | 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.