NumberResearchThousands-blocks in 575-518
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 575-518 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 575-518-0XXX | 0000–0999 | Reserved | MESCALERO APACHE TELECOM, INC. - NM | 661D | SOCORRO | NM |
| — | 575-518-1XXX | 1000–1999 | Reserved | MESCALERO APACHE TELECOM, INC. - NM | 661D | SOCORRO | NM |
| — | 575-518-2XXX | 2000–2999 | Reserved | MESCALERO APACHE TELECOM, INC. - NM | 661D | SOCORRO | NM |
| 2015-04-14 | 575-518-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - NM | 123F | SOCORRO | NM |
| 2015-04-14 | 575-518-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - NM | 123F | SOCORRO | NM |
| 2017-06-09 | 575-518-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | SOCORRO | NM |
| 2012-12-14 | 575-518-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA NM-LLC | 450C | SOCORRO | NM |
| 2015-05-21 | 575-518-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SOCORRO | NM |
| 2009-05-15 | 575-518-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM | 6573 | SOCORRO | NM |
| 2007-01-26 | 575-518-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SOCORRO | 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.