Guam Country info Continent - Oceania Guam capital - Hagåtña Guam ISO code - GU Guam ISO3 code - GUM Guam dialing prefix - +1-671 Next States Agana Heights Agat Asan Barrigada Chalan Pago-Ordot Dededo Hagatna Inarajan Mangilao Merizo Mongmong-Toto-Maite Piti Santa Rita Sinajana Talofofo Tamuning Umatac Yigo Yona See Also: set my alarm for 5 am set alarm 30 minutes from now mac md5character count in pagesanalog clock with timehow to see stopwatchHow many days are in 2027