How can I know the phone numbers and email addresses of major companies? I always receive advertising text messages from other companies. I also want to send advertising text messages.

It’s actually very simple...

First of all, you need to know the name of the company.

Then, you can use Baidu to search for it. You can know the contact information and your company's email address on the company's official website.

You can also ask for your company's phone number through 114, then call and ask for your email address.