Dialing telephone calls from Guyana to Sudan
001
▶ 249
▶ city code
▶ local number
Step-by-step
001
▼ This IDD (International Direct Dial) prefix tells the phone system in Guyana that you are dialing an international number.
249
▼ Country code for Sudan.
city code
▼ local number
Notes
Not sure what time it is on the other end of the line? Look here for Sudan time, date, and time zone information.
If you are calling from a hotel or office phone system, additional steps may be required.