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"I subscribe to \"it takes two to tango\" for two reasons: \n  \nFirst: In the US, on an ARTCC level, it's easy to see when which ARTCC you're in. Use IFR charts, VATTASTIC or VATSpy. Contact the appropriate CTR 20 miles before the border. If there are multiple CTR sectors online, call one and be sure to state your position and altitude. That'll make it easy to switch you if needed. \n  \nI put the onus for initial contact on the pilot when they need to be in touch with CTR. The borders in the US are generally clearly defined. Please use your charts and pay attention. \n  \nSecond: On, the other hand, TRACONs do not have airspace depicted on pilot charts. So, it's hard to determine if you should contact a particular TRACON or not. This is especially so for SoCal since neither VATTASTIC nor VATSpy accurately depict SCT's borders. \n  \nIn this case, it's more of a \"takes two to tango.\" If I'm on SCT, I'm more likely to send you a contact me. It's hard to tell that PSP is completely covered by SCT if you're not familiar with it. \n"
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