NumberResearchThousands-blocks in 234-400
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 234-400 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 234 blocks
Most active assignees, all time — NPA 234
New assignments by month
Sep 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-06-26 | 234-400-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | RICHFIELD | OH |
| 2012-03-14 | 234-400-1XXX | 1000–1999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | RICHFIELD | OH |
| 2021-01-04 | 234-400-2XXX | 2000–2999 | Assigned | ONVOY, LLC - OH | 464C | RICHFIELD | OH |
| 2011-03-28 | 234-400-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | RICHFIELD | OH |
| 2014-05-07 | 234-400-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | RICHFIELD | OH |
| 2012-10-05 | 234-400-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | RICHFIELD | OH |
| 2019-12-11 | 234-400-6XXX | 6000–6999 | Assigned | ONVOY, LLC - OH | 464C | RICHFIELD | OH |
| 2019-12-11 | 234-400-7XXX | 7000–7999 | Assigned | ONVOY, LLC - OH | 464C | RICHFIELD | OH |
| 2021-01-04 | 234-400-8XXX | 8000–8999 | Assigned | ONVOY, LLC - OH | 464C | RICHFIELD | OH |
| 2010-12-20 | 234-400-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | RICHFIELD | OH |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.