NumberResearchThousands-blocks in 319-722
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 319-722 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 319-722-0XXX | 0000–0999 | Available | WILLIAMSBG | IA | ||
| 2018-03-07 | 319-722-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | WILLIAMSBG | IA |
| — | 319-722-2XXX | 2000–2999 | Available | WILLIAMSBG | IA | ||
| — | 319-722-3XXX | 3000–3999 | Available | WILLIAMSBG | IA | ||
| 2023-07-11 | 319-722-4XXX | 4000–4999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | WILLIAMSBG | IA |
| — | 319-722-5XXX | 5000–5999 | Available | WILLIAMSBG | IA | ||
| — | 319-722-6XXX | 6000–6999 | Available | WILLIAMSBG | IA | ||
| 2018-06-28 | 319-722-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | WILLIAMSBG | IA |
| 2017-12-11 | 319-722-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WILLIAMSBG | IA |
| 2015-06-29 | 319-722-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | WILLIAMSBG | 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.