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This guide outlines the supported number types, required documents, hosting rules, and porting timelines for Austrian numbers.

Initial Overview

  1. Supported Number Types

⚠️ Mobile numbers (+43 6) are not portable to VoIP operators. If you already have a mobile number you would like to use for outbound calls on CloudTalk, we can create a Virtual Caller ID of your existing number or help you buy a new Austrian mobile.

  1. Submit Your Request

Request porting directly in the CloudTalk Dashboard: open Numbers > Port existing number and follow the guided steps. All supported number types for this country use the same flow, and you can track your request anytime under Numbers > Porting requests.
Looking to port numbers from other countries? See Global Porting Coverage.

  1. Letter of Authorization

Where an LOA is required, the correct template for this country downloads inside the Documents step of your porting request: download it, sign it, and upload it right there. You no longer need a separate template from this guide. (Other document requirements listed below.)

  1. Timelines & Pricing

⚠️ Timelines may vary if submitted details do not match your current provider’s records.

Required Documents For Number Porting

The correct LOA templates download inside the Documents step of your porting request.

✅ Local Numbers

  • Signed LOA
  • Recent invoice (from current provider)
Compliance:
  • Business registration with a local address (e.g. Handelsregister, Gewa)
  • Authorized representative’s ID (passport, gov. ID, or bank confirmation)

✅ National Numbers

  • Signed LOA
  • Latest invoice from the current service provider

✅ Toll-Free Numbers

  • Signed LOA (if a template is not available to download in the Documents step, we will email you the correct template after you submit; you can submit your request without attaching it)
  • Latest invoice from the current service provider

Porting Process Overview

  1. Submit Your Porting Request
    Submit your request in the CloudTalk Dashboard under Numbers > Port existing number.
  2. Initial Review
    Cloudtalk team’ll verify number portability and confirm the next steps.
  3. Documentation Collection
    Complete and sign the LOA (Letter of Authorization), and provide a recent invoice from your current telecom provider.
  4. Submission to Carrier
    CloudTalk submits your request to our partner carrier, who then forwards it to your current provider.
  5. Approval or Rejection
    • If approved, Cloudtalk team will confirm the porting date (typically 2–4 business days in advance).
    • If rejected, Cloudtalk team will share the reason and guide you on how to correct and resubmit the request.

Common Rejection Reasons


On Porting Day

  • Your number will be activated in CloudTalk
  • Your previous provider will release and deactivate it
  • You’ll start receiving inbound calls in CloudTalk
  • CloudTalk billing begins the same day

Need Help? For further assistance, please refer to: Questions about a request you’ve already submitted? Open it under Numbers > Porting requests and click Open conversation. You can also reach our Porting team by email. We’re always happy to help!