# Where do the first three digits of a telephone number come from?

## Where do the first three digits of a telephone number come from?

Within the director areas, the first three digits of the seven digit subscriber number would relate to the local telephone exchange on which the number could be found. Before all-figure dialling, these were usually three-digit letter codes, based on the first three letters of the exchange name.

## Are there more than one digit in a number?

We have seen that there are single digit as well as two digits numbers, three digits numbers that is, more than one digit numbers. It means in numbers, all digits have their value is called as Place Value. Each digit has its place value. It is counted from right to left. First we shall see what the place value is.

**What do the first 3 digits of a bar code mean?**

For example, the first 3 digits of the bar code reflect the country code where the product was made. All bar codes that start with 690, 691, 692, thru 695 are MADE IN CHINA. Bar code items starting with 471 are Made in Taiwan like this one:

**How are the first three digits of a Social Security number determined?**

The first three (3) digits of a person’s social security number are determined by the ZIP Code of the mailing address shown on the application for a social security number.

### How many 3 digit numbers have exactly 2 digits that are the same?

In a three digit number, the first two digits can be same or the second and third digit can be same or the first and third digit can be same. So, there are three possible ways in a three digit number ,starting with a given number. Hence, total number of ways 9 x 3 = 27

For example, the first 3 digits of the bar code reflect the country code where the product was made. All bar codes that start with 690, 691, 692, thru 695 are MADE IN CHINA. Bar code items starting with 471 are Made in Taiwan like this one:

The first three (3) digits of a person’s social security number are determined by the ZIP Code of the mailing address shown on the application for a social security number.

### What do the first three digits on a UPC barcode mean?

The first digits of a UPC barcode are referred to as a company prefix. Itâ€™s used to identify product manufacturers, and their country of origin. Companies that are based in China are assigned a three-digit company prefix between 690-699.