A valid mobile number in international format typically begins with the country code, followed by the mobile number itself. The country code is a numerical prefix assigned to each country or region by the International Telecommunication Union. For example, the country code for the United States is +1. A valid mobile number in international format for a US number would look like this: +1 (XXX) XXX-XXXX.
An example of a valid mobile phone number might be +1 417 555-0123, except with an actual mobile phone number instead of the fictitious 555-0123. An example in the UK would be +44 7700 900123, which is the (fictitious) UK mobile number 07700 900123 written in international format. A valid mobile phone number is a real phone number that actually connects to a working mobile phone.
That is a valid format for a UK mobile (cell) number. The 7 in the position that it is in identifies it as a mobile number. 00 is the international gateway code, 44 is the country code for UK. Short of dialling it there's no way to know whether it is actually an active number.
In the UK, a valid business number typically refers to a company's unique registration number with Companies House, the registrar of companies in the UK. The number "44770" does not appear to be a standard format for a UK business number. It is possible that it could be a specific reference number for a particular organization or entity, but without more context, it is not possible to determine its validity as a UK business number.
That's an Etisalat mobile number from the United Arab Emirates, country code +971. The correct international format is +971 56 xxx xxxxDo not use any punctuation at all, other than the plus symbol at the start. In particular, no periods, dots, dashes, parentheses, or brackets should be used.(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 are no valid international numbers beginning with +7501 (Country code +7 is Russia and Kazakhstan, but numbers beginning +7 5 are unassigned.) In the UK, 07501, or in international format +44 7501, is a mobile code.
That is not a valid international telephone number.
00 isn't part of the telephone number, it is a commonly used prefix for dialing international calls. However, many countries use different prefixes, so it is less confusing to quote the number in correct international format, beginning with the plus sign and the country code.Country code +241 is Gabon in Africa. However, there are no valid numbers beginning with +241 0. Mobile phone numbers in Gabon begin with 0 in domestic format, but you must drop the trunk prefix 0 when dialing in international format. Without the 0, you do not have enough digits for a valid telephone number. All numbers in Gabon have 8 digits after the country code. Note also that Gabon changed all telephone numbers in the country in 2012.(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.)
This is a UK mobile (cell phone) number.
That's not a valid number.
That is not a valid telephone number either in North America or in international format. Unfortunately, it is very easy for a business switchboard to be "accidentally" programmed to send bogus Caller ID data.
There are no valid UK telephone numbers beginning with 0728 (or +44 728 in international format).
No....valid format symbols are (+,-,*,/ and ^)