x-amz-version-id

The version of the object. When you enable versioning Amazon S3 generates a random number for objects added to a bucket. The value is UTF-8 encoded and URL ready. When you PUT an object in a bucket where versioning has been suspended the version ID is always null.

Header usage statistics

x-amz-version-id response header information and usage statistics.

Websites using header x-amz-version-id	81,003
Percentage of websites that use x-amz-version-id header	0.10%
Total discovered header values	More than 10,000
Header uses directives	No
Header values are unique or random	No
Most popular in the country	United States