Tero Vesalainen / Shutterstock Airbnb and DoorDash are expecting higher than estimated valuations in two of the most anticipated market debuts this year, the Wall Street Journal reported.Airbnb plans to target a valuation between $30 billion to $33 billion, above its previous $30 billion estimate.DoorDash is seeking a valuation between $25 billion to $28 billion, up from a previous estimate of $25 billion.It is unclear what Airbnb and DoorDash's per-share price ranges are for their mid-December IPOs.Visit Business Insider's homepage for more stories.Airbnb and DoorDash plan to target higher valuations for their December IPOs, as the technology sector continues to attract billions in investor flows, the Wall Street Journal reported Monday.Airbnb is seeking a target range of around $30 billion to $33 billion ahead of its Tuesday investor roadshow, the WSJ said, citing sources.