NumberResearchThousands-blocks in 424-367
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 424-367 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 424 blocks
Most active assignees, all time — NPA 424
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-09-30 | 424-367-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | EL SEGUNDO | CA |
| 2014-09-30 | 424-367-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | EL SEGUNDO | CA |
| 2014-09-19 | 424-367-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | EL SEGUNDO | CA |
| 2014-09-19 | 424-367-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | EL SEGUNDO | CA |
| 2016-07-07 | 424-367-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | EL SEGUNDO | CA |
| 2015-01-29 | 424-367-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | EL SEGUNDO | CA |
| 2016-08-09 | 424-367-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | EL SEGUNDO | CA |
| 2015-10-07 | 424-367-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | EL SEGUNDO | CA |
| 2015-01-08 | 424-367-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | EL SEGUNDO | CA |
| 2014-11-03 | 424-367-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EL SEGUNDO | 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.