---
title: "Discussion on \"What Is Number Masking? A Guide to Call Masking\" | Hashnode"
description: "Discussion on \"What Is Number Masking? A Guide to Call Masking\". How a proxy number connects two people, how many numbers you need, and the telecom and privacy rules that apply"
url: "https://hashnode.com/posts/what-is-number-masking/6af73468b113c35d1889631f"
---

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Discussion

# [What Is Number Masking? A Guide to Call Masking](https://piyuzz.hashnode.dev/what-is-number-masking?utm_source=hashnode&utm_medium=feed)

How a proxy number connects two people, how many numbers you need, and the telecom and privacy rules that apply

5h ago · 16 min read · piyuzz.hashnode.dev  
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-   [#privacy](https://hashnode.com/tag/privacy)
-   [#telephony](https://hashnode.com/tag/telephony)
-   [#api](https://hashnode.com/tag/api)
-   [#security](https://hashnode.com/tag/security)
-   [#voip](https://hashnode.com/tag/voip)

## Written by

[Piyush Sahoo](https://hashnode.com/@piyuzz)

@piyuzz · Bengaluru, India

  
[View profile](https://hashnode.com/@piyuzz)

Founding Member, Vobiz. Writing about AI voice agents on the real phone network.

I'm a Founding Member at Vobiz, telephony for AI voice agents. I write about where voice agents meet the phone network: SIP, phone numbers, latency, echo, barge-in and everything that breaks on real calls but not in browser demos. More at piyushsahoo.me

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