NumberResearchThousands-blocks in 606-323
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 606-323 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 606 blocks
Most active assignees, all time — NPA 606
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-06-16 | 606-323-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | INEZ | KY |
| 2024-04-01 | 606-323-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | INEZ | KY |
| — | 606-323-2XXX | 2000–2999 | Available | INEZ | KY | ||
| 2018-12-11 | 606-323-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | INEZ | KY |
| 2022-05-20 | 606-323-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - KY | 4369 | INEZ | KY |
| 2024-08-19 | 606-323-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | INEZ | KY |
| 2020-07-22 | 606-323-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - KY | 8406 | INEZ | KY |
| — | 606-323-7XXX | 7000–7999 | Available | INEZ | KY | ||
| 2024-04-18 | 606-323-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | INEZ | KY |
| — | 606-323-9XXX | 9000–9999 | Available | INEZ | KY |
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.