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It does keep a log… of caller IDs. The problem isn’t the volume of data, it is that the system isn’t setup to authenticate callers so you can’t tie a spam call

• nobody9999 5y ago
  >It does keep a log… of caller IDs. The problem isn’t the volume of data, it is that the system isn’t setup to authenticate callers so you can’t tie a spam call to any persistent identity to block Except the system is set up to authenticate callers[0] and that's been in place (at least in the US) for almost a year. That it hasn't been as effective as it should be is another issue, but the technology exists and is (or should be) in place as specified by the law. [0] https://www.fcc.gov/call-authentication https://www.fcc.gov/call-authentication
• titzer 5y ago
  SMTP isn't authenticated either, and is by many measures way looser than the telephone system (which was built around managing physical wires for almost a century), and yet spam filtering has gotten pretty good?