NumberResearchThousands-blocks in 530-399
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 530-399 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 530 blocks
Most active assignees, all time — NPA 530
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-08-24 | 530-399-0XXX | 0000–0999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CHICO | CA |
| 2016-12-16 | 530-399-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | CHICO | CA |
| 2019-08-21 | 530-399-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | CHICO | CA |
| 2019-07-24 | 530-399-3XXX | 3000–3999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CHICO | CA |
| 2020-10-12 | 530-399-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | CHICO | CA |
| 2021-07-15 | 530-399-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | CHICO | CA |
| 2021-07-15 | 530-399-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | CHICO | CA |
| 2020-11-16 | 530-399-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CHICO | CA |
| 2020-11-16 | 530-399-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CHICO | CA |
| 2020-07-08 | 530-399-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | CHICO | CA |
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.