Bulgaria voice guidelines
Voice calling guidelines for Bulgaria (BG), covering reachability, caller ID formats, DTMF support, and emergency services.
Locale overview
| Field | Value |
|---|---|
| Country | Bulgaria |
| ISO code | BG |
| Region | Europe |
| Dialing code | +359 |
Reachability
Bulgaria supports inbound and outbound calling for domestic, international, and toll-free number types.
| Call type | Inbound | Outbound |
|---|---|---|
| Domestic | Supported | Supported |
| International | Supported | Supported |
| Toll-free | Supported | Supported |
For domestic outbound calls, a Bulgarian phone number must be used as the originating number.
Caller ID
| Call type | Format |
|---|---|
| Domestic inbound | +E.164 |
| Domestic outbound | Local (non-guaranteed) |
| International inbound | +E.164 (non-guaranteed) |
| International outbound | +E.164 |
| Toll-free inbound | +E.164 |
| Toll-free outbound | Local (non-guaranteed) |
Caller ID delivery is non-guaranteed for domestic outbound, international inbound, and toll-free outbound call types. Verified delivery applies to domestic inbound, international outbound, and toll-free inbound.
DTMF support
DTMF tones use the RFC 2833 format and are supported for both inbound and outbound calls.
Emergency services
Calls to emergency services numbers in Bulgaria are not supported. Do not attempt to route emergency calls through this service.
Special requirements
For domestic outbound calls within Bulgaria, the originating caller must be a Bulgarian phone number. Ensure a local Bulgarian number is assigned before placing domestic outbound calls.
Compliance note
These guidelines summarize carrier requirements at the time of publication and do not constitute legal counsel. Verify that your implementation complies with all applicable telecommunications regulations in Bulgaria.