NumberResearchThousands-blocks in 205-433
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 205-433 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 205 blocks
Most active assignees, all time — NPA 205
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 |
|---|---|---|---|---|---|---|---|
| 2016-02-08 | 205-433-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AL | 604E | GRAYSVILLE | AL |
| 2005-05-18 | 205-433-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | GRAYSVILLE | AL |
| 2024-02-05 | 205-433-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AL | 604E | GRAYSVILLE | AL |
| 2023-01-18 | 205-433-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | GRAYSVILLE | AL |
| 2011-03-03 | 205-433-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GRAYSVILLE | AL |
| 2024-02-22 | 205-433-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | GRAYSVILLE | AL |
| 2015-10-08 | 205-433-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | GRAYSVILLE | AL |
| 2012-08-23 | 205-433-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | GRAYSVILLE | AL |
| 2014-02-25 | 205-433-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GRAYSVILLE | AL |
| 2008-11-03 | 205-433-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - AL | 072F | GRAYSVILLE | AL |
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.