I have been receiving dubious calls with spoofed caller ID information for several months now, which I believe to be part of an identity theft scam. When these phone calls come in, I hear a recorded advertisement offering to lower my credit card interest rate and directing me to press 1 to speak with a representative or to press 3 to discontinue future calls. The phone numbers that show up on caller ID for these calls have different area codes and prefixes each time they call, but the last four digits are always 9999. Is it possible to use wildcards for area code and prefix to blacklist all numbers ending in 9999?