Specifies the country code. Each country represented as a two character.

Here is the lsit:

ALBANIA -> AL ALGERIA -> DZ ARGENTINA -> AR ARMENIA -> AM AUSTRALIA -> AU AUSTRIA -> AT AZERBAIJAN -> AZ BAHRAIN -> BH BELARUS -> BY BELGIUM -> BE BELIZE -> BZ BOLIVIA -> BO BRAZIL -> BR BRUNEI_DARUSSALAM -> BN BULGARIA -> BG CANADA -> CA CHILE -> CL CHINA -> CN COLOMBIA -> CO COSTA_RICA -> CR CROATIA -> HR CYPRUS -> CY CZECH -> CZ DENMARK -> DK DOMINICAN_REPUBLIC -> DO ECUADOR -> EC EGYPT -> EG EL_SALVADOR -> SV ESTONIA -> EE FINLAND -> FI FRANCE -> FR FRANCE2 -> F2 GEORGIA -> GE GERMANY -> DE GREECE -> GR GUATEMALA -> GT HONDURAS -> HN HONG_KONG -> HK HUNGARY -> HU ICELAND -> IS INDIA -> IN INDONESIA -> ID IRAN -> IR IRELAND -> IE ISRAEL -> IL ITALY -> IT JAPAN -> JP JAPAN1 -> J1 JAPAN2 -> J2 JAPAN3 -> J3 JAPAN4 -> J4 JAPAN5 -> J5 JAPAN6 -> J6 JAPAN7 -> JP JAPAN8 -> JP JAPAN9 -> JP JAPAN10 -> JP JAPAN11 -> JP JAPAN12 -> JP JAPAN13 -> JP JAPAN14 -> JP JAPAN15 -> JP JAPAN16 -> JP JAPAN17 -> JP JAPAN18 -> JP JAPAN19 -> JP JAPAN20 -> JP JAPAN21 -> JP JAPAN22 -> JP JAPAN23 -> JP JAPAN24 -> JP JORDAN -> JO KAZAKHSTAN -> KZ KOREA_NORTH -> KP KOREA_ROC -> KR KOREA_ROC2 -> K2 KUWAIT -> KW LATVIA -> LV LEBANON -> LB LIECHTENSTEIN -> LI LITHUANIA -> LT LUXEMBOURG -> LU MACAU -> MO MACEDONIA -> MK MALAYSIA -> MY MEXICO -> MX MONACO -> MC MOROCCO -> MA NETHERLANDS -> NL NEW_ZEALAND -> NZ NORWAY -> NO OMAN -> OM PAKISTAN -> PK PANAMA -> PA PERU -> PE PHILIPPINES -> PH POLAND -> PL PORTUGAL -> PT PUERTO_RICO -> PR QATAR -> QA ROMANIA -> RO RUSSIA -> RU SAUDI_ARABIA -> SA SINGAPORE -> SG SLOVAKIA -> SK SLOVENIA -> SI SOUTH_AFRICA -> ZA SPAIN -> ES SWEDEN -> SE SWITZERLAND -> CH SYRIA -> SY TAIWAN -> TW THAILAND -> TH TRINIDAD_Y_TOBAGO -> TT TUNISIA -> TN TURKEY -> TR UKRAINE -> UA UAE -> AE UNITED_KINGDOM -> GB UNITED_STATES -> US UNITED_STATES_FCC49 -> US URUGUAY -> UY UZBEKISTAN -> UZ VENEZUELA -> VE VIET_NAM -> VN YEMEN -> YE ZIMBABWE -> ZW