NumberResearchThousands-blocks in 830-421
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 830-421 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
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-05-12 | 830-421-0XXX | 0000–0999 | Assigned | STPCS JOINT VENTURE, LLC | 4290 | EAGLE PASS | TX |
| 2006-10-09 | 830-421-1XXX | 1000–1999 | Assigned | STPCS JOINT VENTURE, LLC | 4290 | EAGLE PASS | TX |
| 2007-02-16 | 830-421-2XXX | 2000–2999 | Assigned | STPCS JOINT VENTURE, LLC | 4290 | EAGLE PASS | TX |
| 2006-08-23 | 830-421-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | EAGLE PASS | TX |
| 2026-05-13 | 830-421-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EAGLE PASS | TX |
| 2010-12-02 | 830-421-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EAGLE PASS | TX |
| 2007-10-18 | 830-421-6XXX | 6000–6999 | Assigned | STPCS JOINT VENTURE, LLC | 4290 | EAGLE PASS | TX |
| 2010-05-17 | 830-421-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EAGLE PASS | TX |
| 2024-10-17 | 830-421-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | EAGLE PASS | TX |
| 2024-03-25 | 830-421-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | EAGLE PASS | 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.