NumberResearchThousands-blocks in 419-688
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 419-688 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 419 blocks
Most active assignees, all time — NPA 419
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-05-25 | 419-688-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BUTLER | OH |
| — | 419-688-1XXX | 1000–1999 | Reserved | T-MOBILE USA, INC. | 6529 | BUTLER | OH |
| 2022-09-07 | 419-688-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BUTLER | OH |
| 2008-01-04 | 419-688-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BUTLER | OH |
| 2007-04-09 | 419-688-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BUTLER | OH |
| 2011-12-15 | 419-688-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - OH | 001F | BUTLER | OH |
| 2013-09-17 | 419-688-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BUTLER | OH |
| 2014-04-15 | 419-688-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - OH | 001F | BUTLER | OH |
| 2021-11-20 | 419-688-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BUTLER | OH |
| — | 419-688-9XXX | 9000–9999 | Reserved | T-MOBILE USA, INC. | 6529 | BUTLER | OH |
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.