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A lot of telcos used to have phone numbers you could call that would just say the number you're calling from (like with a computerized voice). I forget what th
by amatecha 3y ago
A lot of telcos used to have phone numbers you could call that would just say the number you're calling from (like with a computerized voice). I forget what this was called, but it was talked about in phreaking community or so on. Not sure if these "caller identifier" phone numbers are still around today though.
- miki123211 3y agoThey're easier to make than ever, all you need is Twillio and a bit of Python code. There are quite a few in the US alone, both provided by carriers as well as enthusiasts and other companies in the industry.
- bsagdiyev 3y ago800-444-4444 still works. Even starts with "thank you for calling MCI"
- razakel 3y agoThey're called ANACs - automatic number announcement circuits.
- amatecha 2y agoAh yeah that's right, thanks!
- BayesianDice 3y agoBT in the UK has 17070 which tells you the number and lets you do tests like the "quiet line test". Handy when working out what was going on when I moved into a property with no live phone service (so no normal outgoing calls), lots of phone extension sockets, and (I discovered) two landlines coming in...