Possible BGP hijack

Beginning at 2021-09-26 14:07:48 UTC, we detected a possible BGP hijack.

Prefix, is normally announced by AS4972 UPS-AS4972, US.

But beginning at 2021-09-26 14:07:48, the same prefix ( was also announced by ASN 136933.

This was detected by 6 BGPMon peers.

Start time: 2021-09-26 14:07:48 UTC
Expected prefix:
Expected ASN: 4972 (UPS-AS4972, US)
Event Details
Detected advertisement:
Detected Origin ASN 136933 (GIGABITBANK-AS-AP Gigabitbank Global, HK)
Detected AS Path 138540 9299 3491 58453 136933
Detected by number of BGPMon peers: 6

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