Why is a + needed for a phone number? What does it mean and why can’t it be omitted if the full number follows after anyway?

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Why is a + needed for a phone number? What does it mean and why can’t it be omitted if the full number follows after anyway?

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An international call prefix or dial out code is a trunk prefix used to select an international telephone circuit for placing an international call. It is now called an IDD prefix (international direct dialing) – a country will typically have an NDD prefix as well (national direct dialing). The international dialing prefix must be dialed before the country calling code and the destination telephone number. It is synonymous with international access code or exit code. The international call prefix is part of the telephone numbering plan of a country for calls to another country.

When phone numbers are published for use abroad, they typically show a plus sign (+) prefix in place of any international call prefix, to signify that the caller should use the prefix code appropriate for their country. Many phones allow the plus sign to be entered in their saved number lists, often by holding down the zero (0) key (most GSM mobile phones) or with two consecutive presses of the star (*) key. When making a call, the system then automatically converts the plus sign to the correct international prefix, depending on where the phone is being used, which enables callers to use the same stored number when calling from either their own country or any other

Its to indicate that the next few digit show the country code. And it can be replaced with 00

In some places at least you don’t need it if your call is within the country

Don’t know in depth technical reasons for why, but you can substitute the + with 00.
The next 1-3 numbers usually tells you which country / continent you’re calling.

Multiple countries can have the same phone numbers, since there is only so many combinations you can make with 8-9 digits, so the country code is necessary to know which one you’re calling. Without it, it would default to the number in the country you’re calling from. That should answer if you can omit it.

Hope this helped.

The + symbol indicates that you should replace the ‘+” with the code for dialling international numbers – whatever that code is in your country. In the U.S. it is ’00’, here it is ‘0011’

Many phones follow this standard, meaning that you can dial a number including the + and the phone does the right thing.

Also note that if you have 00 instead of +, whatsapp can’t pick up that your contact is a whatsapp user.