`qsearch-a.akamaihd.net`

Found in [`modules/medianetAnalyticsAdapter.js`](https://github.com/prebid/Prebid.js/blob/master/modules/medianetAnalyticsAdapter.js) and [`modules/medianetBidAdapter.js`](https://github.com/prebid/Prebid.js/blob/master/modules/medianetBidAdapter.js) in Prebid.js.