SNS messages in my billing but not in service details

Question

I've noticed that each month I have entries like the following in my billing for SNS:
> Number of SMS messages sent to Comoros via Senderid | 458 Messages
It's different counts and countries each month.

But I'm not sending those. I have an integration with the SNS API, but looking at my records we haven't sent any SMS messages via the API in the past few months.

I tried looking in the SNS service section in AWS console, but "SMS delivery logs", "Delivery statistics", and "Delivery statistics by country" all show no activity for the past 3 months. I don't really understand where else this could be coming from.

How can I find out what is sending these, and any other info about this beyond the billing line item?

Answer

Are you sure this is on the AWS bill?

Sounds a lot like a twilio bill

Answer

1. Go to Cost Explorer -> Choose Date Range in right pane
2. Granularity -> Daily
3. Dimension -> Usage Type
4. Service -> SNS

Note: Repeat same by changing option in **Dimensions** field as **Cost Category**, **Availability zone** and **Charge Type** one by one and see where you see charges.

This would show you when and what are the resources/which AZ that's happening.

If you want to setup alert, you can consider setting up AWS budgets and configure alarm on those, which would notify you, if you cross the defined usage threshold. Follow the [Well Architected Lab](https://www.wellarchitectedlabs.com/cost/100_labs/100_2_cost_and_usage_governance/1_budget_forecast/)  instructions here for setting up budget alert based on your usage.

However, if you still don't figure out and think that it's not a legitimate charge, contact AWS Billing Support Team by following instructions at [here](https://docs.aws.amazon.com/cur/latest/userguide/billing-get-answers.html)

Hope you find this helpful.

Abhishek

SNS messages in my billing but not in service details

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