> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

# Scenario 5: Transformation of Cellphone Number into E164 Format Using a Custom Transformer

To transform an incoming cellphone number with country code into e164 format, you can use this custom transformer. For example, let’s say, you are bringing in a raw cell phone number with country code as `<Country_code> <Cellphone number>`. For example, `34 679594499`. By default, Zeotap CDP creates hashes of `SHA256` and `MD5`. In this example, to transform the `SHA256` hashed value into e164 format, you can use the following directives:

#### Directives for Data Transformation

```bash Code theme={null}
copy phone cellphone_number_e164_sha256
set-type :cellphone_number_e164_sha256 string
find-and-replace cellphone_number_e164_sha256 s/^/+/
hash cellphone_number_e164_sha256 SHA-256 true
```

Below are details of how each directive functions:

| **Directive**                                          | **Description**                                                                                                                                      |
| ------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------- |
| `copy phone cellphone_number_e164_sha256`              | Copies the value from the phone field and assigns it to the `cellphone_number_e164_sha256` field.                                                    |
| `set-type :cellphone_number_e164_sha256 string`        | Sets the data type of the `cellphone_number_e164_sha256` field to string, ensuring it is interpreted and processed as a string data type.            |
| `find-and-replace cellphone_number_e164_sha256 s/^/+/` | Finds the beginning of the value in the `cellphone_number_e164_sha256` field and replaces it with a plus sign (+).                                   |
| `hash cellphone_number_e164_sha256 SHA-256 true`       | Hashes the value in the `cellphone_number_e164_sha256` field using the SHA256 hash function, ensuring irreversible encryption for security purposes. |