Best Answer

Because then they are more complicated so there can be more phone numbers. Imagine if phone numbers were 3 numbers long! We would have run out a long time ago.

Q: Why are phone numbers 7 digits?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

Assuming you can use the values listed, and the phone number is 7 digits (e.g. XXX-XXXX), then you can select 3 numbers for the first digit (0 is exempt) then 4 selections for the rest of the digits. So, 3*4*4*4*4*4*4 = 12288 phone numbers.

It is a number that has 7 numbers (or digits) in it. Such as 1,234,567

Any variation of 10 digits.

7

A crore has 7 digits.

Related questions

Telephone numbers throughout Russia are uniformly 3 digits for the area code plus 7 digits for the local number.

10,000

Phone numbers are seven digits long in some countries but differing lengths in others. It purely depends upon what number of phone numbers the country needs .

Assuming you can use the values listed, and the phone number is 7 digits (e.g. XXX-XXXX), then you can select 3 numbers for the first digit (0 is exempt) then 4 selections for the rest of the digits. So, 3*4*4*4*4*4*4 = 12288 phone numbers.

There are no local phone numbers in London beginning with 961, nor even beginning with 9. Local numbers in London begin with 3, 7, or 8, with a further seven digits.

It is a number that has 7 numbers (or digits) in it. Such as 1,234,567

7 = digits in a telephone number (not counting the area code)

the area code

Any variation of 10 digits.

No! The number of digits varies by country, and may vary within a country. International standards restrict the total phone number length including country code to 15 digits maximum (which would be 11 digits for the US and Canada including our country code +1), but what happens after the country code is up to that country. 10-digit and 9-digit phone numbers within a country are common. Smaller countries may have fewer digits: Iceland has 7-digit numbers. China uses 10 digits for landlines but 11 digits for mobile phones; it is effectively in a slow migration to 11 digits. Germany until a few years ago had variable length numbers from 7 to 12 digits, the subscriber (local) part being as short as 4 digits for old numbers and longer for new numbers, but since 2010 uses 10 or 11 digits total. Most countries use 2-digit area codes (with 7 or 8-digit local subscriber numbers), but that varies too, with some using 3 or 4-digit area codes. The UK uses a variable length area code: Even though UK phone numbers are 10 digits almost everywhere (9 digits for certain old numbers), the city code portion can be from 2 to 6 digits, so that large cities have a 2-digit city code and 8-digit local portion, while smaller towns have longer city codes and shorter local numbers.

A crore has 7 digits.

7