NumberResearchThousands-blocks in 575-686
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 575-686 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 |
|---|---|---|---|---|---|---|---|
| — | 575-686-0XXX | 0000–0999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPITAN | NM |
| 2013-11-20 | 575-686-1XXX | 1000–1999 | Assigned | VALOR TELECOM TX,LP-NM #2 DBA WINDSTREAM COMM SW | 1193 | CAPITAN | NM |
| 2014-09-17 | 575-686-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - NM | 123F | CAPITAN | NM |
| 2017-08-15 | 575-686-3XXX | 3000–3999 | Assigned | ONVOY, LLC - NM | 206F | CAPITAN | NM |
| 2026-02-24 | 575-686-4XXX | 4000–4999 | Assigned | TULAROSA COMMUNICATIONS, INC. - NM | 470G | CAPITAN | NM |
| — | 575-686-5XXX | 5000–5999 | Available | CAPITAN | NM | ||
| 2025-06-12 | 575-686-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CAPITAN | NM |
| 2024-07-08 | 575-686-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPITAN | NM |
| 2014-12-08 | 575-686-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPITAN | NM |
| 2013-07-08 | 575-686-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPITAN | NM |
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.