Time Warner Cable's flirtation with potential merger suitors may include Comcast, which is seeking advice on possible regulatory hurdles if it should pursue a bid, sources close to the situation told CNBC on Friday.

Comcast, the parent company of CNBC and NBC, is not in active discussions on deal terms with Time Warner Cable, these sources say, but is asking for guidance on antitrust and telecommunications-related issues. According to people familiar with the matter, TWC has made it clear that if it should sell itself, Comcast would be its preferred buyer.

These people add that Comcast has been quietly mulling a deal with TWC for some time, although Time Warner was the first to indicate interest to Comcast. "It's not as if Comcast is trying to [aggressively] go after Time Warner Cable," said one source with knowledge of the situation.

Time Warner Cable is on the verge of a bid from Charter Communications, according to The Wall Street Journal, which said Charter is near an agreement with banks for the funds to make that offer. Analysts, however, say Time Warner's needs may be better suited with Comcast.



(Read more: Charter nears funding for Time Warner Cable bid: WSJ)