 How to call:
00 - Exit code when making an international call from Principe
44 - UK country code for inbound calls
28 - Londonderry city code
00 + 44 + 28 + Local Number - International dialing code format
 World Times:
The time in Principe is now 07:51:45 AM (07:51:45 AM)
The time in Londonderry United Kingdom is now 08:51:45 AM (08:51:45 AM)
 Mobile codes:
To call a mobile phone in United Kingdom from Principe use the following dialing code format: 00 + 44 + Mobile Code* + The Number
*United Kingdom has multiple mobile carriers: 74## (Mostly mobile broadband), 75##, 7624 (Isle of Man), 77##, 78##, 79##
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