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Just like 1.1.1.1 used to be null routed?

Not exactly; example.com and .org are reserved in RFC 2606[1]. 1.1.1.1 is not listed in the special use RFC[2], it's just an address previously unused by APNIC.

[1]: https://tools.ietf.org/html/rfc2606

[2]: https://tools.ietf.org/html/rfc5735

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