NumberResearchThousands-blocks in 350-888
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/21/2026
The ten 1,000-number thousand-blocks inside prefix 350-888 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 350 blocks
Most active assignees, all time — NPA 350
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-10-07 | 350-888-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | GROVELAND | CA |
| 2022-10-13 | 350-888-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | GROVELAND | CA |
| 2023-11-13 | 350-888-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GROVELAND | CA |
| — | 350-888-3XXX | 3000–3999 | Available | GROVELAND | CA | ||
| — | 350-888-4XXX | 4000–4999 | Available | GROVELAND | CA | ||
| — | 350-888-5XXX | 5000–5999 | Available | GROVELAND | CA | ||
| 2023-01-05 | 350-888-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | GROVELAND | CA |
| — | 350-888-7XXX | 7000–7999 | Available | GROVELAND | CA | ||
| — | 350-888-8XXX | 8000–8999 | Available | GROVELAND | CA | ||
| 2022-10-27 | 350-888-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | GROVELAND | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.