NumberResearchThousands-blocks in 830-399
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 830-399 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 830 blocks
Most active assignees, all time — NPA 830
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 830-399-0XXX | 0000–0999 | Reserved | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | PLEASANTON | TX |
| 2007-07-17 | 830-399-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PLEASANTON | TX |
| 2008-05-12 | 830-399-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | PLEASANTON | TX |
| 2011-07-15 | 830-399-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | PLEASANTON | TX |
| 2005-08-22 | 830-399-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | PLEASANTON | TX |
| 2008-12-19 | 830-399-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PLEASANTON | TX |
| 2009-03-12 | 830-399-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PLEASANTON | TX |
| 2012-12-20 | 830-399-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | PLEASANTON | TX |
| 2022-02-08 | 830-399-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PLEASANTON | TX |
| — | 830-399-9XXX | 9000–9999 | Reserved | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | PLEASANTON | TX |
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.