Los Angeles Major issue:

Widespread underlying fiber-optic cable failures affecting Cogent and Zayo have led to reduced network stability in the Los Angeles area.
Due to nested leasing arrangements within US Tier-1 backbones, the impact has extended to GTT and Arelion.
Packet loss has been observed on routes from Los Angeles toward the East (including Europe); the DMIT NOC has temporarily removed some of the most severely affected routes.

Some AS174 and AS3257 single home networks are not able to be migrated for network reachablity reason.

https://tranzact.zayo.com/#!/networkStatus

https://ecogent.cogentco.com/network-status