 How to call:
00 - Exit code when making an international call from Vietnam
359 - Bulgarian country code for inbound calls
52 - Varna city code
00 + 359 + 52 + Local Number - International dialing code format
 World Times:
The time in Vietnam is now 16:49:02 PM (04:49:02 PM)
The time in Varna Bulgaria is now 12:49:02 PM (12:49:02 PM)
 Mobile codes:
To call a mobile phone in Bulgaria from Vietnam use the following dialing code format: 00 + 359 + Mobile Code* + The Number
*Bulgaria has multiple mobile carriers: 48, 87 (Vivacom), 88 (Mobiltel), 89 (Globul), 988 (Other mobile networks)
| 
