Q: icloud caller list

Hi valbuz,

I understand that you have some questions about your backup and what is stored there. Let's go over some information to help clear this up for you. 

The first thing I would look at is the first article below. It will details what content is backed up when using iCloud to backup your iPhone. 

About backups in iCloud and iTunes
https://support.apple.com/en-us/HT204136

Now if you would like iCloud to not have your contact, you can simply turn that off. Go to Setting > iCloud and then turn off Contacts. You will be prompted to either keep or delete the contacts from your iPhone. You will want to keep them on your iPhone. Take a look at the next article for details on changing features of iCloud on your iPhone. 

iCloud: Change iCloud feature settings
https://support.apple.com/kb/PH2613

If you would like to delete the contact from iCloud, you would simply log on to iCloud.com and navigate to the contacts tab. I would make sure you have a safe copy of your contacts first but then you would be able to delete the contacts afterwards. Take a look at the next to articles to make a back up and delete the contacts. 

Archive or make copies of your iCloud data
https://support.apple.com/en-us/HT204055

Delete a contact
http://help.apple.com/icloud/#/mm6704c88a​

Have a good day