NumberResearchThousands-blocks in 520-200
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 520-200 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 520 blocks
Most active assignees, all time — NPA 520
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-04-14 | 520-200-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | HAYDEN | AZ |
| 2011-07-11 | 520-200-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | HAYDEN | AZ |
| 2015-06-24 | 520-200-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | HAYDEN | AZ |
| 2012-05-03 | 520-200-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | HAYDEN | AZ |
| 2016-05-02 | 520-200-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | HAYDEN | AZ |
| 2014-12-11 | 520-200-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | HAYDEN | AZ |
| 2015-05-26 | 520-200-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | HAYDEN | AZ |
| 2012-05-18 | 520-200-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | HAYDEN | AZ |
| 2013-03-12 | 520-200-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | HAYDEN | AZ |
| — | 520-200-9XXX | 9000–9999 | Reserved | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | HAYDEN | AZ |
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.