NumberResearchThousands-blocks in 319-243
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 319-243 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 319 blocks
Most active assignees, all time — NPA 319
New assignments by month
Sep 2026
Aug 2026
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Jun 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-02-03 | 319-243-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CEDARFALLS | IA |
| 2012-11-14 | 319-243-1XXX | 1000–1999 | Assigned | ONVOY, LLC - IA | 221F | CEDARFALLS | IA |
| — | 319-243-2XXX | 2000–2999 | Reserved | QWEST CORPORATION | 9631 | CEDARFALLS | IA |
| 2007-03-23 | 319-243-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CEDARFALLS | IA |
| 2025-06-25 | 319-243-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CEDARFALLS | IA |
| 2012-07-19 | 319-243-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CEDARFALLS | IA |
| 2012-11-14 | 319-243-6XXX | 6000–6999 | Assigned | ONVOY, LLC - IA | 221F | CEDARFALLS | IA |
| 2012-11-14 | 319-243-7XXX | 7000–7999 | Assigned | ONVOY, LLC - IA | 221F | CEDARFALLS | IA |
| 2010-07-07 | 319-243-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CEDARFALLS | IA |
| 2014-05-12 | 319-243-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - IA | 6266 | CEDARFALLS | 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.