this post was submitted on 19 Dec 2025
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One of the biggest fails in phone service was the ability to spoof caller ID. Spammers will use prefixes from known cell phone blocks or the same prefix you’re on to make it look more legitimate. The carriers should have also included source number checking too as they shouldn’t be getting an external call from a number that they own.
phone companies could fix this tomorrow
they don’t because money
This is one of the ways I identify spam calls. My cell phone number is from a long way away from where I live now. As far as I know I have no remaining associations with any businesses in the area - certainly none that wouldn't have cause to leave a voicemail - and I know the numbers of my friends and family in the area.
Therefore, if I get a call from an unknown number in that area code and they don't leave a voicemail, they were nearly certainly spam callers. Often even if they do leave a voicemail.
A little while ago I got a call from a number in that area code and they did leave a voicemail, but I haven't been able to figure out what the point was. For the purposes of this anecdote, let's pretend my name is John Smith. The voicemail consisted of the following:
"[Long silence] John? [Another long pause] John ... [One more long pause] Smmmmmiiiiiiiiiiiiiitthhhhh .... [Final long pause, then disconnect]"
They haven't called back, so I have no idea what they wanted. For the two times saying my first name, I figured they were just a recruiter who thought I had picked up, rather than my voicemail; but the way they stretched out my last name (and said nothing further) was honestly creepy as hell.
Back when I had a Pixel 2 Google would look up the numbers that would call and if the number was associated with a business in their database then they’d show the business name with the caller ID (because cellphones in the US for some reason don’t show the names that would appear if calling a landline). My wife owned a successful bakery at the time and one day I got a call that showed up as being from one of her competitors. Curious, I answered the call, but it was just another scammer. This was fairly early in the days of scammers, so I called the number back and connected to the bakery, so I told them they should call their phone company.
I’m pretty sure the scammers just make up numbers, not caring if they’re active or not. There’s a fundamental flaw with the design of the phone system that they don’t require authentication. It’s absurd to me that this has been widely abused for close to a decade now and they haven’t changed the system to prevent this. It seems like it should be fairly straightforward to have a system that authenticates that a call comes from someone authorized to use a number.