NumberResearchThousands-blocks in 858-324
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 858-324 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 858 blocks
Most active assignees, all time — NPA 858
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-04-22 | 858-324-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RNCHOPNQTS | CA |
| 2004-09-30 | 858-324-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | RNCHOPNQTS | CA |
| 2005-08-25 | 858-324-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | RNCHOPNQTS | CA |
| 2017-05-23 | 858-324-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | RNCHOPNQTS | CA |
| 2008-12-17 | 858-324-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2013-12-19 | 858-324-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2014-04-02 | 858-324-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RNCHOPNQTS | CA |
| 2014-03-17 | 858-324-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | RNCHOPNQTS | CA |
| 2015-12-28 | 858-324-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | RNCHOPNQTS | CA |
| — | 858-324-9XXX | 9000–9999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7147 | RNCHOPNQTS | CA |
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.