We know a traditional HTTP Server Response codes like 200, 404 and 500 . But Akamai Content Delivery Network follows slightly additional set of HTTP Status codes like 000 .
Here is the details of Akamai Edge HTTP Response Codes mentioned in Akamai KB Article
OK: content was delivered to the client (200, 206, 408)
Not-Modified: a positive response to a content freshness request (304)
Redirect: a redirect response was...
