Possible BGP hijack

Beginning at 2019-04-03 09:59:55 UTC, we detected a possible BGP hijack.

Prefix 103.123.100.0/24, is normally announced by AS138145 ADVANCED-AS-AP Advanced Information Company Limited, HK.

But beginning at 2019-04-03 09:59:55, the same prefix (103.123.100.0/24) was also announced by ASN 21859.

This was detected by 78 BGPMon peers.

Expected
Start time: 2019-04-03 09:59:55 UTC
Expected prefix: 103.123.100.0/24
Expected ASN: 138145 (ADVANCED-AS-AP Advanced Information Company Limited, HK)
Event Details
Detected advertisement: 103.123.100.0/24
Detected Origin ASN 21859 (ZNET - Zenlayer Inc, US)
Detected AS Path 20205 6939 21859
Detected by number of BGPMon peers: 78

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