I know many topics were made about Anokata's whereabouts, but I think that we should all combine every little possible evidence suggests the identity of Anokata. And eliminate every wrong claim about Anokata.
1. Anokata is referred to by Gin as he, and Vermouth is Anokata's favorite so the highest possibility is that Anokata is in fact male. So we may remove every female suspect.
2. As once Ai Haibara said:"I'm afraid that you dear Kudo are part of half a century project test", implying that the B.O is at least 50 years old. Thus Anokata is either young male because like Vermouth he is able not to age, or Anokata is an old male which suggests that he is physically weak not in his prime.
3. Anokata is respected by all B.O members including both Vermouth who is giving independence, and Gin who is merciless and will kill at times. Which can be deduced that Anokata not just a very smart person but also intimidating one too.
4. It is known that Gosho Aoyama's wife who also is the voice of Conan, KNOWS the identity of Anokata. Implying that he already been introduced since she wouldn't know his identity if he is yet to appear as Aoyama isn't that type of person. We can now deduce that Anokata has been seen at least once before.
5. Gosho already mentioned that Anokata's name has appeared somewhere before, also Gosho didn't think that DC will last more than 3 months indicating that within the first 12 episodes a hint was giving about Anokata.
6. The B.O wears only black and resembles ravens suggesting that Anokata thought of Nanatsu no Ku as the basic idea to implant to his creation of an organization. Since black is every member wears black, it means every member resembles a crow.
7. If the B.O is more than 50 years old, the most rational idea is that Anokata is more than one person.
8. Anokata love mysteries and detective after all APTX4869 stand for Sherlock and Shelling a password that B.O uses is a prototype name that Sir Arthur Conan Doyle considered for a name to his character Sherlock Holmes, before settling on the name. Means that Anokata is either was a detective once or a novelist once, or even Sherlockian freak.
9. Evidently he is Japanese, and since Gosho admitted that Ai would be surprised by Anokata's identity. He is probably connected to her father somehow, a co worker family relative or is it even her own father.
10. As suggested Anokata is someone who Gin and Vermouth can blindly trust, thus it can be that Vermouth is his love interest and Gin is in debt for him since Anokata somehow saved Gin's life before. Which would suggest why Gin would hate Vermouth as she will make Anokata 'soft'.
11. Gosho did tell that the official name of the B.O will give away the identity of Anokata, so Anokata's name was heard before which make the official name of the B.O is something we heard before. Like that we can safely presume it's more of a company than an organization since no one would make his name being obvious in a criminal organization, that's why it is more likely to be a company.
12. Conan did get the phone number of Anokata, but so far he didn't call as was adviced by Ai. Knowing Conan/Shinichi he would manage to call Anokata without raising too much suspicions meaning that Ai still have secrets about Anokata that she wouldn't share as of yet as evidently she knew Anokata's phone number even before Conan deduced it out.
For the moment this is the board for most likely possibilities please share your opinions in order to make a conclusive conclusion .....