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I have a Japanese language sub-domain: ja.example.com, which is hosted by server A.
The root domain (example.com) is hosted by server B.
They have completely different IP addresses: (e.g.) 220.127.116.11 vs. 56.45.03.12.
Will the sub-domain be indexed by search engines?
The sub-domain has been live for one month and there have been no visits by organic searches.