Main count from Traveler’s Century Club
UN list from here.
- United States (UN 1, ISO 1: US) 1959
- Canada (UN 2, ISO 2: CA) 1962
- Mexico (UN 3, ISO 3: MX) 1968?
- England (UN 4, UK, ISO 4: UK) 1986
- India (airport overnight only, ISO 5: IN)
- Singapore (UN 5, ISO 6: SG)
- Hawaiian Islands (not UN, not ISO) 1987
- Indonesia (Java) (UN 6, ISO 7: ID)
- Chile (UN 7, ISO 8: CL)
- Bahamas (UN 8, ISO 9: BS) 1989
- Ireland (Eire) (UN 9, ISO 10: IE) 1990
- Northern Ireland (Ulster) (part of UK #4)
- Virgin Islands, US (part of US #1, ISO 11: VI)
- Jamaica (UN 10, ISO 12: JM)
- Puerto Rico (part of US #1, ISO 13: PR)
- Haiti (UN 11, ISO 14: HT)
- St. Maarten (part of NL #30, ISO 15: SX)
- Leeward Islands, French (part of FR #36, ISO 16: MF)
- Martinique (part of FR #36, ISO 17: MQ)
- Barbados (UN 12, ISO 18: BB) 1991
- Aruba (part of NL #30, ISO 19: AW)
- Venezuela (UN 13, ISO 20: VE)
- Colombia (UN 14, ISO 21: CO)
- Panama (UN 15, ISO 22: PA)
- Honduras (UN 16, ISO 23: HN)
- Belize (UN 17, ISO 24: BZ)
- Cayman Islands (British overseas territory, ISO 25: KY)
- Wales (part of UK) 1992
- Scotland (part of UK)
- Netherlands (UN 18, ISO 26: NL)
- Germany (UN 19, ISO 27: DE)
- Austria (UN 20, ISO 28: AT)
- Italy (UN 21, ISO 29: IT)
- Liechtenstein (UN 22, ISO 30: LI)
- Switzerland (UN 23, ISO 31: CH)
- France (UN 24, ISO 32: FR)
- Greece (UN 25, ISO 33: GR) 2007
- Ionian Isles (Corfu) (part of GR #37)
- Egypt (UN 26, ISO 34: EG)
- Crete (part of GR #37)
- Turkey in Asia (UN 27, ISO 35: TR)
- Turkey in Europe (part of TR #41)
- Denmark (UN 28, ISO 36: DE) 2008
- Estonia (UN 29, ISO 37: EE)
- Russia (UN 30, ISO 38: RU)
- Finland (UN 31, ISO 39: FI)
- Sweden (UN 32, ISO 40: SE)
- Norway (UN 33, ISO 41: NO)
- New Zealand (UN 34, ISO 42: NZ) 2010
- Australia (UN 35, ISO 43: AU)
- Spain (UN 36, ISO 44: ES) 2011
- Morocco (UN 37, ISO 45: MA)
- Canary Islands (part of ES #51)
- Madeira (part of Portugal, so UN 38)
- Bermuda (British overseas territory, ISO 46: BM) 2012
- Hong Kong (UN 39, China, ISO 47: HK)
- Macau (UN 39, China, ISO 48: MO)
- Dubai (UN 40, United Arab Emirates, ISO 49: AE)
- Luxembourg (UN 41, ISO 50: LU)
- Costa Rica (UN 42, ISO 51: CR)
- El Salvador (UN 43, ISO 52: SV)
- Faroe Islands (part of Denmark, so UN 28, ISO 53: FO)
- Iceland (UN 44, ISO 54: IS)
- Belgium (UN 45, ISO 55: BE)
- Guatemala (UN 46, ISO 56: GT)
- Nicaragua (UN 47, ISO 57: NI)
- Virgin Islands, British (UN 4, ISO 58: VG)
- Montserrat (UN 4, ISO 59: MS)
- Leeward Islands, Netherlands (UN 30, ISO 60: BQ)
- St. Barthélmy (UN 24, ISO 61: BL)
- Japan (UN 48, ISO 62: JP) (2013)
- Thailand (UN 49, ISO 63: TH)
- Sumatra, Indonesia (UN 6, ISO 7)
- Vietnam (UN 50, ISO 64: VN)
- Guam (UN 1, ISO 65: GU)
- Micronesia, Federated States of (UN 51, ISO 66: FM)
- Marshall Islands, Republic of (UN 52, ISO 67: MH)
- South Korea (UN 53, ISO 68: KR)
- Sri Lanka (UN 54, ISO 69: LK)
- Maldives (UN 55, ISO 70: MV)
- Malaysia (UN 56, ISO 71: MY)
- Myanmar (UN 57, ISO 72: MM)
- Bulgaria (UN 58, ISO 73: BG)
- Romania (UN 59, ISO 74: RO)
- Ukraine (UN 60, ISO 75: UA)
- Alaska (UN 1, ISO 1: US)
- South Africa (UN 61, ISO 76: ZA)
- Isle of Man (UN 4, ISO 77: IM)