Area Code 4101 – Opan
The phone area code for Opan is 4101 (international format +3594101). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 4101
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Opan
Geographic Overview
The +359 4101 prefix is a geographic National Destination Code (NDC) assigned to the town of Opan and its surrounding villages within the Stara Zagora Province of central Bulgaria. This area falls under the administrative jurisdiction of the Opan Municipality, which is situated approximately 25 kilometers southeast of the regional capital, Stara Zagora. The code serves a predominantly rural region, with local telecommunications infrastructure supporting both residential and business subscribers.
Dialing Formats
For callers within Bulgaria, the national trunk prefix '0' must be dialed before the area code. The complete national format is: 0 4101 XXX XXX (where X represents the subscriber number). For example, a local call to a subscriber in Opan would be dialed as 04101 123 456.
For international callers, the Bulgarian country code (+359) replaces the trunk prefix '0'. The international format is: +359 4101 XXX XXX. Thus, a caller from abroad would dial +359 4101 123 456 to reach the same subscriber.
Caller Instructions
- Local callers (within Bulgaria): Always use the trunk prefix '0' when dialing any geographic number, including those in Opan. For example, dial 04101 123 456.
- International callers: Replace the leading '0' with the country code +359. For instance, from the United States, dial 011 359 4101 123 456; from the UK, dial 00 359 4101 123 456.
Numbering Plan Considerations
As a geographic code, +359 4101 is tied to the PSTN (Public Switched Telephone Network) and is used for fixed-line services. Subscriber numbers within this NDC typically consist of six to seven digits, following the ITU-T E.164 recommendation. The code is not portable to mobile networks, meaning that if a subscriber moves to a different geographic area, they must obtain a new local number. However, number portability within the same geographic area is possible between fixed-line operators.
There are no known overlay codes for the Opan area, so the 4101 prefix remains the sole geographic identifier for this locality. Callers should be aware that while VoIP services may allow users to register numbers with this prefix, the underlying geographic association remains unchanged.