How do I know who owns a (secondary) Tumblr blog? How to know followers blogs?

Definitions, information in Tumblr before my question is clear:

• In Tumblr, the entire user account had a main blog, for example noticiasdepoliticahoy.tumblr.com.
• This user can create secondary blogs, which had limitations: cannot follow as a secondary blog of another blog, cannot like this additional blog of another blog, just the main user of the account.

My questions:

Q1: how do I know when I follow any Tumblr blog, is it someone's primary blog or secondary blog?

Q2: If I follow the secondary user block, how do I know this primary user name of this user?

An example of a real world with examples of Tumblr blog names: 1. I follow the block ABC1.tumblr.com 2. I follow the block ABC2.tumblr.com 3. User DEFG3.tumblr.com started to follow me 4. User HIJK4.tumblr. com started to follow me

How do I know who owns ABC1.tumblr.com and the blog ABC2.tumblr.com?

If I check a blog using http://postlimit.com , I can get information on what can help to find this blog as primary or secondary.

Check this out, 3queries, possibly the primary account first and 2 secondary:

URL:                http://whisperedepiphanies.tumblr.com/  
Username:           whisperedepiphanies
Blog Title:         ~whispered epiphanies~
Total Posts:        6539
Allows Ask:         Yes
Allows Ask (anon):  Yes
Number of Likes:    6685
Shares Likes:       Yes


URL:                http://noticiasdepoliticahoy.tumblr.com/    
Username:           noticiasdepoliticahoy
Blog Title:         Noticias de Política
Total Posts:        1169
Allows Ask:         No
Allows Ask (anon):  No
Number of Likes:    Not Shared
Shares Likes:       No 

URL:                http://lobo-de-luna.tumblr.com/     
Username:           lobo-de-luna
Blog Title:         In ignota
Total Posts:        2011
Allows Ask:         Yes
Allows Ask (anon):  Yes
Number of Likes:    Not Shared
Shares Likes:       No 

So, the secondary account now had no preferences with share. But how do you know - back to my example - who owns the secondary blog?

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