NumberResearchThousands-blocks in 712-337
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 712-337 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
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 712-337-0XXX | 0000–0999 | Reserved | QWEST CORPORATION | 9631 | ARNOLDS PK | IA |
| 2025-09-03 | 712-337-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ARNOLDS PK | IA |
| 2024-07-30 | 712-337-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ARNOLDS PK | IA |
| — | 712-337-3XXX | 3000–3999 | Reserved | QWEST CORPORATION | 9631 | ARNOLDS PK | IA |
| 2025-04-21 | 712-337-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ARNOLDS PK | IA |
| 2022-12-15 | 712-337-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IA | 9877 | ARNOLDS PK | IA |
| 2014-05-23 | 712-337-6XXX | 6000–6999 | Assigned | PREMIER COMMUNICATIONS, INC. - IA | 904D | ARNOLDS PK | IA |
| 2016-11-22 | 712-337-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ARNOLDS PK | IA |
| — | 712-337-8XXX | 8000–8999 | Reserved | QWEST CORPORATION | 9631 | ARNOLDS PK | IA |
| 2019-09-18 | 712-337-9XXX | 9000–9999 | Assigned | AUREON COMMUNICATIONS, LLC | 444G | ARNOLDS PK | 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.