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

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Initial Overview

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  1. Supported Number Types

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  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.

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  1. Letter of Authorization

You’ll need to submit a signed Letter of Authorization (LOA). If a template is available for this country, it downloads inside the Documents step of your porting request; otherwise we’ll email you the correct template after you submit. Sign it and upload it with your request. (Other document requirements listed below.)

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  1. Timelines & Pricing

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

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Required Documents for Number Porting

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✅ Local Numbers

  • Latest Invoice from your current service provider (Issued within the last 30 days, must list the number(s) to be ported)
  • Signed LOA (Letter of Authorization)
  • Company Registration Certificate
  • Copy of LOA signatory’s valid Photo ID or Passport
  • Proof of ownership - one of the following:
    ▫ Invoice listing all numbers being ported
    ▫ Official document or letter from the losing carrier confirming number ownership

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✅ Toll-Free Numbers

  • Latest Invoice from your current provider
  • Signed LOA
  • Photo ID or Passport of the LOA signatory
  • Proof of ownership - same conditions as for local numbers (invoice or attest from the losing provider)

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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.

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Common Rejection Reasons

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On Porting Day

  • The number will be activated in CloudTalk
  • Your previous provider will release and deactivate the number
  • You’ll begin receiving inbound calls through 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!