Guidelines

Czech Republic (CZ)

Locale Summary
Locale name	Czech Republic
ISO code The International Organization for Standardization two character representation for the given locale.	CZ
Region	Europe
Dialing code The dialing prefix used to establish a call or send an SMS from one locale to the given locale.	+420

Guidelines
Portable Numbers	Geographic (local) numbers National numbers (+420910) Toll-Free numbers (+420800)
Restrictions	Most of International Phone Numbers have VOICE capability only, no SMS.
Required Information	OKU Code (14 digits long unique identification code) for each phone number Applicable regulatory compliance documentation
Timeframe	Once you submit all required documentation/information, up to 2 weeks, depending on the complexity of the port and time required by the current service provider.
Regulatory Bodies	The Czech Telecommunication Office (ČTÚ)
Other Details	A porting date is often scheduled with a short notice (1-2 business days).
How To Submit	Please submit your request via the porting form here. You can find all the requirements needed here.

For the benefit of all our customers, these guidelines are provided to help you comply with applicable requirements and to help ensure Twilio's platform remains compliant with global telecommunications ecosystem requirements. These guidelines represent our current understanding of common compliance requirements generally applicable to Twilio and its customers, and do not constitute legal advice. By posting these guidelines, Twilio makes no assurances regarding the legal compliance of your application built using our APIs. You are expected to understand and abide by all compliance obligations applicable to your specific application. You should check these pages regularly for updates as telecommunications ecosystem requirements continue to evolve and change, and the information below may be updated or changed without notice.