Possible BGP hijack

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

Prefix 103.1.248.0/22, Normally announced by AS55383 IDC-JP YYY Group, Inc., JP

Starting at 2020-09-29 17:46:06, a more specific route (103.1.249.0/24) was announced by ASN 1221.

This was detected by 142 BGPMon peers.

Expected
Start time: 2020-09-29 17:46:06 UTC
Expected prefix: 103.1.248.0/22
Expected ASN: 55383 (IDC-JP YYY Group, Inc., JP)
Event Details
Detected advertisement: 103.1.249.0/24
Detected Origin ASN 1221 (ASN-TELSTRA Telstra Corporation Ltd, AU)
Detected AS Path 8399 3257 4637 1221
Detected by number of BGPMon peers: 142

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