I'm researching how internationalized domain names are managed and need to find details for the '.career Arabic' IDN table. Specifically, what is its current version and which organization is responsible for its maintenance? Additionally, explain the primary purpose of the 'e164.arpa' second-level domain and identify the RFC document that defines its operational usage.
Navigate to the 'Repository of IDN Practices' page on iana.org. Locate the entry for '.career Arabic' in the displayed table. Extract the 'Version' and 'Responsible Party' for '.career Arabic'. Navigate to the '.ARPA Zone Management' page on iana.org. Locate the 'e164.arpa' entry in the table of second-level domains. Extract the 'Usage / Reference' information, specifically the RFC number, for 'e164.arpa'. Synthesize the collected information into a concise answer.
State the version of the .career Arabic IDN table as 2.5. State the responsible party for the .career Arabic IDN table as Verisign Inc. Explain that 'e164.arpa' is used for mapping E.164 numbers to Internet URIs. State the RFC that defines 'e164.arpa' usage as RFC 6116.