There are some rouge ham radio operators in San Antonio, currently facing legal action from the FCC & local court system. This number belongs to one of them. The caller won't leave a message, just blank airtime, but if you answer it, he'll say "Breaker one nine" (like on a CB radio), or similiar comments. He started calling multiple ham radio operators yesterday at all hours. One of his 5 calls to me was at 2:36 AM.