NumberResearchThousands-blocks in 520-317
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 520-317 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-05-22 | 520-317-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AZ | 630E | HAYDEN | AZ |
| 2017-08-14 | 520-317-1XXX | 1000–1999 | Assigned | ONVOY, LLC - AZ | 630E | HAYDEN | AZ |
| 2019-01-29 | 520-317-2XXX | 2000–2999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | HAYDEN | AZ |
| 2016-07-18 | 520-317-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | HAYDEN | AZ |
| 2016-07-18 | 520-317-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AZ | 630E | HAYDEN | AZ |
| 2019-04-26 | 520-317-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | HAYDEN | AZ |
| 2019-06-11 | 520-317-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | HAYDEN | AZ |
| 2019-06-11 | 520-317-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | HAYDEN | AZ |
| 2017-08-14 | 520-317-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | HAYDEN | AZ |
| 2018-04-19 | 520-317-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | HAYDEN | AZ |
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.