# Allowed Numbers Parameters

When you export your Allowed Numbers list, or build a file to import one, the data is stored as a CSV (comma-separated values) file: a plain-text table where each row is one entry. Each row describes a single entry using the columns below. Use this reference to fill in every column correctly before importing.

## Name

- **Required:** Yes
- **Restriction:** Up to 127 characters.
- **Default:** None.

A label that identifies the entry.

:::caution
Keep the name to 127 characters or fewer. This is the maximum the field accepts, so a longer value will cause that row to fail when you import the file.
:::

## Type

- **Required:** Yes
- **Default:** `inbound`

Sets the direction that the entry applies to. Choose one of the following values:

- `inbound`, the number or numbers may place calls into your phone system.
- `outbound`, extensions on your phone system may place calls to the number or numbers.
- `both`, calls are permitted in both directions: the number or numbers may call in, and extensions may call out to them.

:::note
If you leave this column blank, the entry is saved with the default value `inbound`.
:::

## Number

- **Required:** Yes
- **Restriction:** May contain digits, letters, and the characters `[` `]` `*` `#` `(` `)` `.` `-` `+` `!`.
- **Default:** None.

The number or number pattern the entry allows.

:::tip
To include several numbers or patterns in one entry, separate them with an ampersand (`&`), for example `{number1}&{number2}`. This lets you group related numbers into a single row instead of creating one row per number.
:::