Possible BGP hijack

Beginning at 2020-05-21 04:06:51 UTC, we detected a possible BGP hijack.

Prefix 131.28.120.0/22, is normally announced by AS383 AFCONC-BLOCK1-AS, US.

But beginning at 2020-05-21 04:06:51, the same prefix (131.28.120.0/22) was also announced by ASN 136933.

This was detected by 20 BGPMon peers.

Expected
Start time: 2020-05-21 04:06:51 UTC
Expected prefix: 131.28.120.0/22
Expected ASN: 383 (AFCONC-BLOCK1-AS, US)
Event Details
Detected advertisement: 131.28.120.0/22
Detected Origin ASN 136933 (GIGABITBANK-AS-AP Gigabitbank Global, HK)
Detected AS Path 28329 13786 7195 22356 3491 3491 58453 136933
Detected by number of BGPMon peers: 20

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