example.com, example.net, and example.org are currently served by EdgeCast CDN (now Edgio).
Edgio went bankrupt and the CDN will be shutdown on January 15 [0].
As of January 14, the example domains still resolve to 93.184.215.14 which is an EdgeCast IPv4 address [1][2].
I'm not sure who in IANA or IETF manages these domains [3].
If you have scripts, tests, or infrastructure that reference these domains, you might get errors or outages if these domains are not updated by January 15.
Disclosure: I previously worked at EdgeCast and remembered that we were serving these domains.
[0] https://docs.edg.io/applications/v7/release_notes [1] https://www.nslookup.io/domains/example.com/dns-records/ [2] https://ipinfo.io/93.184.215.14 [3] https://www.iana.org/help/example-domains