Maximum number of option sin select attribute

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I have a website at stringermanagement.com run for a local real estate rental company. One of the field created when trying to add a new listing has a list of condos/subdivision the property is in. The list is about 445 long for options. For some reason, I cannot get it to accept any options in that select attribute past the 332'd option. It acts like it saves it but will not. Is there a limitation on the number of options in a select list?