The country code for North America (USA, Canada, etc.) is +1. The area code for Houston is 713, 281, or 832. Area code 346 will be added as a further overlay in 2014.
The plus sign means "insert your international access prefix here." From Australia, that prefix is usually 0011.
The dialing code for Australia when calling from the USA is 61.
0061 - no that's for calling Australia from New Zealand. The answwer is 0064
The country code for Sweden is +46, no matter where you're calling from.
Country code +354 is Iceland.
Germany is country code +49.
The country code and area code of Central East Australia, Australia is 61, (0)2.
The country code and area code of South East Australia, Australia is 61, (0)3.
To call Australia from the US using Verizon, dial the international access code (011), followed by Australia's country code (61), then the area code and phone number in Australia. Make sure you have an international calling plan with Verizon to avoid additional charges.
Colombia is country code +57.
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You need to know what time it is in Australia. Who ever you are calling should know that you are calling them. The international access code is 011. After the other code is 61. Dial both of those numbers and that is it.
The format for dialing is: your country's exit code + country code you are calling to + city/area code + local number. The country code for the UK is 44. The city code for London is 020, but you must drop the first zero when calling from overseas. The exit code for Australia is 0011. So, you would dial: 0011 + 44 + 20 + the eight digit number of whoever you are calling. If you have been given a full 11 digit UK phone number, just remove the first zero and prefix with 0011 44. For example, mobile phone 07123 456789 becomes 0011 44 7123 456789.