00 = commonly used international access prefix, not part of the country code
+7 = country code for Russia and Kazakhstan
423 = area code for landlines in Primorsky Krai
09xxxx = invalid local number (too few digits, can't start with 0)
Alternatively,
007 = international access prefix from a few places
+423 = country code for Liechtenstein
09xxxx = invalid number in Liechtenstein
There is no country that never uses the number 6.
Chad uses telephone country code +235. To write a mobile number in Chad in international format, just put +235 in front of the domestic number.
The territory of Western Sahara is occupied and controlled by Morocco, so it uses Morocco's telephone country code +212.
There is no telephone country code +0919; telephone country codes never begin wtih zero.Country code +91 is India, and a number beginning +91 9 is a mobile.(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.)
A calling code, also called a telephone area code or just area code, is a number that identifies a particular geographic area for telephone numbering purposes. For example, in the UK, telephone area code 01244 identifies telephone numbers from the city of Chester and nearby areas.A calling code for an entire country is called a telephone country code. For example, the telephone country code for North Korea is +850.(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.)
There is no telephone country code +443.Telephone country code +44 is the United Kingdom, and a number beginning with +44 3 is a non-geographic number, billed within the UK at rates comparable to calling a landline number within the UK. Rates for calls from outside the UK may vary.(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.)
Telephone country code +57 is Colombia, in South America.(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.)
It's impossible to say without knowing what country you're asking about. For example, the Netherlands uses telephone country code +31, and a number beginning with +31 6 is a mobile phone.
The French overseas territory of Wallis and Futuna uses country code +681.
Since Ontario is not a country, it does not have a telephone country code. Both the Canadian province of Ontario and the city of Ontario, California, are in North America's telephone country code +1, with a three-digit area code and seven-digit subscriber number. Telephone country code +1 includes the USA, Canada, and 18 assorted Caribbean-ish islands.(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 Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
Telephone country code +40 (dialed as 00 40 from many places) is Romania.The structure of telephone numbers in Romania is unusual. The '3' immediately after the country code identifies this number as a landline served by a competing telephone company such as Astral Telecom/UPC Romania or Romania Data Systems/RDS. The next two digits, 72, identify this number as a non-geographic number, located anywhere within Romania.(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.)
There is no telephone country code +0564, because telephone country codes never begin with zero.Telephone country code +56 is Chile. A number beginning with +56 4 is a landline in Bí­o-Bí­o, Ñuble, Concepción, Arauco, or Araucaní­a.(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.)