The part about the 55515 makes me think that all those fake 555 phone numbers on TV and in movies is some kind of spell. Sleep pleb, sleep.
That 555 etc number is weird. I have no clue.
My understanding, being somewhat involved while in the industry, is that in early television production, ATT agreed to use that preliminary digital code for its own business - NO area codes or exchange segments available. That allowed show writers and producers to use it on shows and movies without having to worry about some poor schlepp in West Tumbleweed, Miniconsin getting inundated in crank telephone calls - and suing someone's bloomers off. đ¤đ
In about 1948 Bell Labs published in one of their technical journals a proud report for the computer age of many (all?) of their digital codes they were going to use in high speed switching and routing equipment, including proposed satellite access codes. (For example, the 'disconnect' tone for all calls was - and may still be - 2600 hz)
Someone at Bell Labs woke up and realized they had just given away their whole operating platform including all service billing bypass codesâ Bell Telephone had a mad dash to recover as many of those published issues as they possibly could - and did a fairly good job of it.
But not quite good enough - naturally. Phone hackers, like 'Captain Crunch', built what became known as the 'Blue Box' which allowed him in his computerized van to pull up to a random terminal box along the road, hook up anonymously to some phone line, and start 'stacking up' trunk lines, satellite up links and build a round the world 'Round Robin' back to another phone line in his van.
The Blue Box looked and worked just like a Touch Tone pad on a house phone - except the tone codes were different, naturally.
I knew someone who built a Blue Box back in the 70s. I don't think they were much interested in more than to see if the technology worked. It didâ
I know by the 80s Bell/ATT redesigned their network operating system to stop the phone hackers. I really am not sure how successful they were but I suspect pretty darn successfulâđ¤ˇ