In general, you're not going to find arthouse flms with big traditional media spends as they tend to target internet/viral marketing.
Otherwise they usually target older demos and older skewing programs. So CBS is generally the most arthouse despite not really having an arthouse label owned by its parent company (CBS Films, Paramount Vantage/Paramount Classics are all gone).
NBC when they do is generally a more inhouse brand like Focus Features. ABC, 20th Century (Formerly Fox)
In general news/investment programs so CNN/MSNBC/FOX News/Fox Business.