In the United Arab Emirates, telephone area code 02, or +971 2 in international format, is Abu Dhabi.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
Area code 02 (+33 2 in international format) is roughly the northwest quadrant of France. A telephone number beginning with 02 99 is most likely in or near the city of Rennes in Brittany (Bretagne).
Abu Dhabi, as the capital of the United Arab Emirates (UAE), shares the country code of the UAE, which is +971. This international dialing code is used when making phone calls to the UAE from abroad. Within the UAE, local numbers may begin with specific area codes, with Abu Dhabi itself using the area code 02.
The telephone country code for France is +33. The area code for Bretagne is 02, or +33 2 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. The area code for Basse Normandie is 02, or +33 2 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. The area code for the Centre region is 02, or +33 2 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. The area code for Haute Normandie is 02, or +33 2 in international format. The local number is a further 8 digits.
The telephone country code for France is +33. The area code for the Pays de la Loire region is 02, or +33 2 in international format. The local number is a further 8 digits.
A telephone number beginning with +61 2 8 [or (02) 8 in Australian domestic format] is in Sydney, NSW.
There are actually two very different places in New South Wales, Australia, with telephone numbers beginning with 80. Any telephone number beginning with 8 in area code 02 is in Sydney or its suburbs. Any telephone number beginning with 80 in area code 08 is in the area around Broken Hill, NSW, or nearby areas of S.A. There are a few other places near the edges of NSW where the state line zigs and the area code boundary zags.
Australian telephone area code 02 (or +61 2 in international format) covers most of New South Wales, all of A.C.T., and a couple of odd bits of neighbouring states. A number beginning with 02 49 is in the Newcastle/Lower Hunter area.
A French telephone number beginning with 02 is a landline in the northwestern part of France. A number beginning with 02 31 51 is probably in or near Bayeux.
France does not have area codes - they have ten digit phone numbers that are dialled in full. Numbers starting '02' are normally in north west France.