Possible BGP hijack

Beginning at 2020-07-11 12:27:15 UTC, we detected a possible BGP hijack.

Prefix 203.23.96.0/24, is normally announced by AS1221 ASN-TELSTRA Telstra Corporation Ltd, AU.

But beginning at 2020-07-11 12:27:15, the same prefix (203.23.96.0/24) was also announced by ASN 15580.

This was detected by 147 BGPMon peers.

Expected
Start time: 2020-07-11 12:27:15 UTC
Expected prefix: 203.23.96.0/24
Expected ASN: 1221 (ASN-TELSTRA Telstra Corporation Ltd, AU)
Event Details
Detected advertisement: 203.23.96.0/24
Detected Origin ASN 15580 (Gutenbergstrasse 8, DE)
Detected AS Path 15547 8220 3356 4637 15580
Detected by number of BGPMon peers: 147

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