This guide outlines the supported number types, required documents, hosting rules, and porting timelines for Slovak numbers.
Initial Overview
1. Supported Number Types
Number Type | Example Prefixes |
Local | +421 2 xxx xxxx (Bratislava), +42155xxx xxxx (Košice) |
Toll-Free | +421800xxx xxx |
2. 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.
3. 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.)
4. Timelines & Pricing
Number Type | Estimated Duration | Price |
Local | 5–7 business days | €30.00 per request, €10.00 per number |
Toll-Free | 5–7 business days | €30.00 per request, €10.00 per number |
⚠️ Timelines may vary if submitted details do not match your current provider’s records.
Required Documents for Number Porting
✅ Local Numbers
Latest Invoice from the Current Service Provider (dated within the last 30 days)
Signed LOA (Letter of Authorization)
✅ Toll-Free Numbers
Latest Invoice from the Current Service Provider (dated within the last 30 days)
Signed LOA
Porting Process Overview
Submit Your Porting Request
Submit your request in the CloudTalk Dashboard under Numbers > Port existing number.
Initial Review
Cloudtalk team'll verify number portability and confirm the next steps.
Documentation Collection
Complete and sign the LOA (Letter of Authorization), and provide a recent invoice from your current telecom provider.
Submission to Carrier
CloudTalk submits your request to our partner carrier, who then forwards it to your current provider.
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
Issue | Explanation | Resolution |
Mismatched information | Invoice or LOA does not match provider records | Confirm the legal entity name and registered address |
Incomplete LOA | Missing signature or incorrect formatting | Use the provided LOA template and sign correctly |
Outdated invoice | Invoice is older than 30 days | Submit a recent copy |
Number inactive | Number has been suspended or canceled by current provider | Ask your provider to reactivate the number first |
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:
Porting Pricing and Coverage - all countries where we offer porting
Country Specific Porting Guides - for our most requested countries
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!