Possible BGP hijack

Beginning at 2020-09-29 17:46:06 UTC, we detected a possible BGP hijack.

Prefix 157.133.40.0/21, is normally announced by AS393335 SAP-DC-CO2, US.

But beginning at 2020-09-29 17:46:06, the same prefix (157.133.40.0/21) was also announced by ASN 1221.

This was detected by 141 BGPMon peers.

Expected
Start time: 2020-09-29 17:46:06 UTC
Expected prefix: 157.133.40.0/21
Expected ASN: 393335 (SAP-DC-CO2, US)
Event Details
Detected advertisement: 157.133.40.0/21
Detected Origin ASN 1221 (ASN-TELSTRA Telstra Corporation Ltd, AU)
Detected AS Path 49463 8218 6461 4637 1221
Detected by number of BGPMon peers: 141

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