Based on your location, but I know that there's stories about location not being accurate, remember seeing a report that some Pizza app and ride sharing apps can be more accurate. Someone told me on their cell phone 911 went to state's highway patrol instead of the city police, not sure if true or not since haven't had to dial 911 from a cell phone.

However if you have VOIP, not all VOIP providers support 911 but the ones that do want you to set a 911 address on your account itself, phone number or for a specific Analog telephone adapter - ATA Device from my understanding. I know our cable company provides phone service and the old modem had a sticker warning about VOIP and E911, not sure if the new one does or not since haven't looked at it too much.

California 911 - the fact that your phone is from NY is not only ignored but never referenced in the process - this isn't a great analogy but you could think of your cellphone as having a built-in walkie-talkie that it uses for emergency calls. All the mechanisms for making a normal phone call are discarded when you dial an emergency number. So, nowhere on the state diagram of making an emergency phone call, is the box that says "Tell the user to dial 1 before a long distance number" - they are two separate systems.