Setting DNS under heroku (root domain)?

Question

Domain Name System

Trying to set up DNS for heroku.
1 — Registered a domain at 2domains.ru (mydomen.ru type domain)
2 — added domains (www.mydomen.ru, mydomen.ru) to heroku for the application
3 — added 2 CNAME records (@) in the 2domens.ru admin panel for my domain CNAME herokuapp.com, www CNAME herokuapp.com)

www.mydomen.ru works, but mydomen.ru doesn't, Any thoughts?

(no more DNS records)

Answer 1

setup example via heroku ip:
@ A 174.129.212.2
@ A 75.101.145.87
@ A 75.101.163.44
www CNAME yourapp.herokuapp.com.

Answer 2

There is another option CNAME record of the subdomain www looks at heroku, and CNAME record of the root domain looks at www:
www.domain.com . 3600 IN CNAME app.herokuapp.com.
@ 3600 IN CNAME www.domain.com .

Answer 3

Use add-on: https://devcenter.heroku.com/articles/zerigo_dns