You can glean a lot from #BGP route changes. #AS397222 recently began announcing 192.28.94.0/24 a #3M prefix which includes an address mapped to an authoritative name server for 3m.com.
The significance? 397222 is originated by #Neustar security group. The other auth name server is also being originated by another Neustar ASN. What we can't know definitely from routes alone is intent. Could be proactive, an active DDoS mitigation in progress, minor configuration change, a test, or something else.
For more:
* CIDR Report https://www.cidr-report.org/cgi-bin/as-report?as=AS397199&view=2.0
* RIPE routing-history https://stat.ripe.net/widget/routing-history#w.resource=192.28.94.0/24