You can ask the Chronicler, or a Storyteller for more detail. Furthermore, you can see at a glance who controls what, and what are the battlelines in LA. If it's really specific stuff, it may require a roll, e.g.:
Is someone I am looking for there? (Wits+Streetwise+Contacts) Who is the top Kindred in the area? (Intelligence+Politics+Influence) Can I purchase guns here? (Charisma+Firearms+Resources/Manipulation+Streetwise+Contacts)
Also, while you are allowed to travel, and have adventures around the world, Domains can only be built up to Lancaster (North), Santa Barbara (West), Oceanside & Escondido (South) and San Bernardino, nearby mountains included (East). The islands of San Miguel, Santa Rosa, Santa Cruz, San Nicolas, San Clemente and Santa Catalina are also part of the space where one may build a Domain.
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