Encodings
Ɐ is encoded in Unicode at U+2C6F Ɐ latin capital letter turned a (HTML: Ɐ) in the block Latin Extended-C, though very few fonts support it as of 2008, and ɐ is encoded in Unicode at U+0250 ɐ latin small letter turned a (HTML: ɐ) in the block IPA Extensions.
The similar turned alphas are at U+2C70 Ɒ latin capital letter turned alpha (HTML: Ɒ capital), and at U+0252 ɒ latin small letter turned alpha (HTML: ɒ).
The mathematical symbol ∀ is encoded at U+2200 ∀ for all (HTML: ∀ ∀), in the mathematical operators and symbols in Unicode, and only in a sans-serif form.
The Symbol font includes ∀ at position 34 (which would produce the quotation mark in ASCII and Unicode).
Read more about this topic: Turned A