Q:

What is "EC2-Other" filter in "Cost Explorer" mean?

While investigating AWS Bill using Cost Explorer tool, I selected EC2-Other filter under services and it showed an amount around 5k monthly but I still don’t know what services are costing all this amount. What does EC2-Other include in Cost Explorer?

A:

There are 2 parts to your question (give a man a fish, and teach him how to fish). 

Costs for EC2-Other include things such EBS, Data transfer, Load Balancers, etc.
If you'd really want to check internally what you're being charged for, go to "Cost Explorer", select the monthly cost report, filter on the right the "EC2-Other" service, and group by "Usage Type"

Good luck 

A:

In order to understand EC2-Other Costs you'll need to get its details In AWS Cost Explorer > Explore Cost & Usage > in the right panel filter by Service and select EC2-Other. In the graph, group by "usage type".
I present below a list with the most common EC2-Other costs, which are associated to the following services:

EBS:VolumeUsage.gp2($)    
EBS:SnapshotUsage($)  
CPUCredits:t2/t3($)   
NatGateway-Hours($)
DataTransfer-Regional-Bytes($)
ElasticIP:IdleAddress($)
NatGateway-Bytes($)   
REGION1-REGION2-AWS-Out-Bytes($)  
REGION1-REGION2-AWS-In-Bytes($)
Others

For the detailed list in your current AWS account you can look at the list below the graph, and consider downloading the .csv file in case you need to share this info w/ your accounting/finance staff.

Reference Links:

https://www.devcop.io/2018/12/12/pesky-aws-ec2-other-costs-confusion-all-around/
https://www.itproportal.com/features/7-hidden-aws-costs-that-could-be-killing-your-budget/
https://forums.aws.amazon.com/message.jspa?messageID=705136

