The country code for Croatia is +385. This code is used to dial Croatian numbers from international locations. It precedes the area code and local subscriber number when dialing from abroad.

To dial a Croatian landline domestically, dial 0 followed by the area code and the subscriber number. For example, to call a Zagreb landline, dial 01 followed by the seven-digit local number.

Dial 00 (the international prefix), followed by 385 (Croatia's country code), then the area code (without the 0), and finally the local subscriber number. For instance, to call Zagreb, dial 00 385 1 XXX XXXX.

Croatian mobile numbers begin with 09 followed by a digit identifying the operator and then a six-digit subscriber number. The format is 09X XXX XXX, where X represents a digit.

HAKOM, the Croatian Regulatory Authority for Network Industries, oversees Croatia's telephone numbering plan. They ensure compliance with international standards (like ITU-T E.123 and E.164), manage number allocation to operators, and regulate special service numbers.

The article provides regular expressions for validating various Croatian number formats. For example, geographic numbers use `^0[1-9]\d{7}$`, mobile numbers use `^09[1-9]\d{6}$`, and toll-free numbers use `^0800\d{6}$`.

Croatia supports number portability, allowing subscribers to keep their numbers when changing operators. This practice complies with EU regulations and has been in effect since 2014, promoting competition and consumer choice in the telecom market.

The article specifically mentions Zagreb's area code as 01. While other area codes aren't listed explicitly, they typically range from 1 to 9, varying by region. More detailed information can be found on HAKOM's website.

Developers should store Croatian phone numbers in E.164 format (+385XXXXXXXXX) for consistency and international compatibility. This format simplifies number processing and ensures accurate routing of calls and messages across different systems.

Premium rate numbers in Croatia follow the format 060X XXX XXX. These numbers are used for entertainment or information services and typically incur higher charges than standard calls. 'X' denotes a digit from 1-9

Yes, number portability is available in Croatia for both mobile and fixed-line numbers. This allows subscribers to retain their existing phone number even after switching to a different telecom operator.

Golden numbers in Croatia are premium numbers with easily memorable sequences (e.g., repeating digits). They may incur additional fees due to their desirability. Availability and specific charges depend on the operator.

The emergency number in Croatia is 112. This number provides access to emergency services like police, fire, and ambulance. It's a short code easily dialed from any phone.