Possible BGP hijack

Beginning at 2019-06-13 20:12:51, we detected a possible BGP hijack.

Prefix, Normally announced by AS21928 T-MOBILE-AS21928 - T-Mobile USA, Inc., US

Starting at 2019-06-13 20:12:51, a more specific route ( was announced by ASN 28306.

This was detected by 2 BGPMon peers.

Start time: 2019-06-13 20:12:51 UTC
Expected prefix:
Expected ASN: 21928 (T-MOBILE-AS21928 - T-Mobile USA, Inc., US)
Event Details
Detected advertisement:
Detected Origin ASN 28306 (Britis Telecom LTDA, BR)
Detected AS Path 267170 28140 263110 52840 28306
Detected by number of BGPMon peers: 2

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