Public cloud market leader Amazon Web Services (AWS) today announced price cuts for a few types of virtual machine (VM) instances that people can use to run applications remotely.

This is at least the third time the C4 instance family has gotten a price cut and the second time for the M4. This is the first time that I know of for the T2 family — which launched in 2014 — to see a price drop.

But the cuts are only specific to certain AWS data center regions. For example, the C4 price cuts are only applicable in US East (Northern Virginia), EU (Ireland), Asia Pacific (Mumbai), and Asia Pacific (Sydney). In the first two of those regions, prices are going down by 5 percent, while in the second two, they’re going down by 20 percent, effective December 1, AWS chief evangelist Jeff Barr wrote in a blog post.

The story is similar with M4: 10 percent down in US East (Northern Virginia), EU (Ireland), and EU (Frankfurt), and 25 percent down in Asia Pacific (Singapore). And for T2, in the widely used US East (Northern Virginia) region prices go down 10 percent, while in Asia Pacific (Singapore) they drop 25 percent.

Other popular public clouds, like Google Cloud Platform and Microsoft Azure, also announce price cuts from time to time. The clouds also compete on features and their geographic reach.