Quick Answer: How Do You Store Phone Numbers?

Which data type is best for storing a phone number?

Choosing the right data type.

(Integer or String)…Best way to store Phone Number in a database.Take input from the user.Identify the country of the user.

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Check the formatting of the phone number and compare with that country’s format.If Invalid, prompt the user to re-enter.If Valid, convert the format into E..

Will we ever run out of phone numbers?

With ten digits, assuming a non-zero first digit, you can have 9,000,000,000 phone numbers. The population of the US (2012) is 313.9 million, or 313,900,000. … [2] estimates that the US population will hit a billion in 2100, so a few years from then is probably when we will run out of phone numbers.

Is a phone number an integer?

5 Answers. Telephone numbers are strings of digit characters, they are not integers.

Is 411 still available?

Just dial 1-800-FREE-411 (or 1-800-373-3411) from your phone. Since the service is sponsored by advertisers, you’ll have to listen to a 10-second ad before you can speak, but the service is free, easy to remember, and easy to use.

Is phone number varchar or INT?

A subset of the INT type are the signed and unsigned integers. Signed means that the integer field can contain a negative number. Unsigned means that it only contains positive numbers. The easiest format for telephone numbers is a VARCHAR .

Which datatype is used for phone number in SQL?

Numeric data types:Data typeStoragebigint8 bytesdecimal(p,s)5-17 bytesnumeric(p,s)5-17 bytessmallmoney4 bytes7 more rows

How are phone numbers stored in database?

A phone number should always be stored as a string or text and never an integer. Some phone numbers generally use hyphens and possibly parentheses. Also, you might need to indicate the country code before the phone number such as +46 5555-555555.

How do I store phone numbers in SQL?

If this is realistically the main way anything is done to the table, store only the digits in a secondary column as I said, and then make the index for that column the clustered one. We use varchar(15) and certainly index on that field. Use CHAR(10) if you are storing US Phone numbers only.

What is the shortest phone number?

Thanks to the international phone numbering plan (ITU-T E. 164), phone numbers cannot contain more than 15 digits. The shortest international phone numbers in use contain seven digits. With all of this in mind, let’s look at the regular expression again after breaking it into its pieces.

How many digits is the longest phone number?

15 digitsThe International Telecommunication Union (ITU) has established a comprehensive numbering plan, designated E. 164, for uniform interoperability of the networks of its member state or regional administrations. It is an open numbering plan, however, imposing a maximum length of 15 digits to telephone numbers.

What kind of data is a phone number?

Both numerical and categorical data can take numerical values. Categorical data can take values like identification number, postal code, phone number, etc.

What is the oldest phone number?

In the early 1930’s, it was given the phone number “PE6-5000”— in today’s phone parlance the letters P and E become 7 and 3 respectively, giving it the number 212-736-5000. Still in use today, it’s the longest continually operating phone number.

What type of data are telephone numbers?

A nominal number names something—a telephone number, a player on a team. Nominal numbers do not show quantity or rank. They are used only to identify something.

What data type should be used for the telephone field and why?

Telephone numbers need to be stored as a text/string data type because they often begin with a 0 and if they were stored as an integer then the leading zero would be discounted.

What is varchar data type?

A varchar or Variable Character Field is a set of character data of indeterminate length. The term varchar refers to a data type of a field (or column) in a Database Management System which can hold letters and numbers.

What is e164 number?

E. 164 is the international telephone numbering plan that ensures each device on the PSTN has globally unique number. This number allows phone calls and text messages can be correctly routed to individual phones in different countries. E.

What is the longest international phone number?

In the United States and other countries participating in NANP, the maximum length of a phone number is 10 digits. Internationally, phone lengths vary, but the ITU E. 164 states that phone numbers around the globe are recommended to not be longer than 15 digits.

Why is 555 a fake number?

Narrator: The short answer is that most 555 numbers are not working numbers, so real people won’t be harassed if diehard fans try to call them. 555 was an exchange combination that was not used very often in the American telephone system. You may get a wrong number, or no number at all.