NumberResearchThousands-blocks in 520-636
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 520-636 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
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Jun 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-05-23 | 520-636-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AZ | 630E | SAN MANUEL | AZ |
| 2018-04-19 | 520-636-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | SAN MANUEL | AZ |
| 2019-12-27 | 520-636-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AZ | 630E | SAN MANUEL | AZ |
| 2015-10-01 | 520-636-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | SAN MANUEL | AZ |
| 2020-10-22 | 520-636-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | SAN MANUEL | AZ |
| 2019-06-11 | 520-636-5XXX | 5000–5999 | Assigned | ONVOY, LLC - AZ | 630E | SAN MANUEL | AZ |
| 2019-06-11 | 520-636-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | SAN MANUEL | AZ |
| 2016-02-24 | 520-636-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | SAN MANUEL | AZ |
| 2016-02-24 | 520-636-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | SAN MANUEL | AZ |
| 2020-05-28 | 520-636-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | SAN MANUEL | 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.