---
title: "Do I need a VoIP number to use Groundwire?"
topic: "Setup & Configuration"
updated: 2026-05-04
canonical: https://acrobits.net/resources/knowledge-base/do-i-need-a-voip-number-to-use-groundwire/
summary: "Yes — Groundwire is a SIP softphone client, so you need a SIP account from a VoIP provider (such as VoIP.ms, Twilio, or Telnyx). The provider assigns your phone number and gives you SIP credentials. Groundwire does not provide phone numbers itself."
---

# Do I need a VoIP number to use Groundwire?

> Yes — Groundwire is a SIP softphone client, so you need a SIP account from a VoIP provider (such as VoIP.ms, Twilio, or Telnyx). The provider assigns your phone number and gives you SIP credentials. Groundwire does not provide phone numbers itself.

Yes — you need a [SIP](/voip-glossary/sip/)/VoIP account to use Groundwire. Groundwire is a SIP softphone client, meaning it connects to a SIP server provided by a VoIP provider. The provider gives you the number, the server, and the credentials; Groundwire handles everything on your phone.

## What you need before setting up Groundwire

  - **A SIP account** from a VoIP provider (examples: VoIP.ms, Twilio, Telnyx, Vonage Business, or a business PBX like 3CX or FreePBX).

  - **SIP credentials** — your provider will give you a SIP username, password, and server/domain address.

  - Your phone number is assigned by the provider, not by Groundwire itself.

## Groundwire does not provide phone numbers

Acrobits makes the app; your VoIP provider makes the calls possible. Groundwire [supports any standards-compliant SIP provider](/resources/knowledge-base/groundwire-compatibility/) — if your provider gives you SIP credentials, it will work.

The app itself is a [$9.99 one-time purchase](/resources/knowledge-base/how-much-does-groundwire-cost/), with no subscription.

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