NumberResearchThousands-blocks in 712-399
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 712-399 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 712 blocks
Most active assignees, all time — NPA 712
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-03-29 | 712-399-0XXX | 0000–0999 | Assigned | ONVOY, LLC - IA | 221F | MALVERN | IA |
| 2021-03-29 | 712-399-1XXX | 1000–1999 | Assigned | ONVOY, LLC - IA | 221F | MALVERN | IA |
| 2020-09-23 | 712-399-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9631 | MALVERN | IA |
| 2021-04-14 | 712-399-3XXX | 3000–3999 | Assigned | ONVOY, LLC - IA | 221F | MALVERN | IA |
| 2021-04-21 | 712-399-4XXX | 4000–4999 | Assigned | BTC, INC. - IA | 156C | MALVERN | IA |
| 2022-02-23 | 712-399-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | MALVERN | IA |
| 2024-11-20 | 712-399-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MALVERN | IA |
| — | 712-399-7XXX | 7000–7999 | Available | MALVERN | IA | ||
| 2022-10-10 | 712-399-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | MALVERN | IA |
| — | 712-399-9XXX | 9000–9999 | Available | MALVERN | IA |
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.