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City: Users can limit search results to devices located by city. For example, “city:sacramento. ” Country: Users can restrict search results to devices by country using the two-digit country code. For example, “country:US. ” Hostname: Users can limit search results to devices by the value in their hostname. For example, “hostname:facebook. com. ” Operating system: Users can search for devices based on operating system. For example, “microsoft os:windows. ”