What’s causing the Error Code BLZBNTBGS000003F8?
Method 1: Rolling back networking driver (if applicable)
Several Windows 10 users that were encountering this issue with Killer E2200 networking drivers have managed to fix this issue entirely after rolling back the driver using Device Manager. After they manage to revert to an older version of the networking driver, they were able to play COD Modern Warfare or COD Black Ops 4 without getting random BLZBNTBGS000003F8 disconnects. Here’s a quick guide on rolling back on the networking driver: If the same problem is still occurring with the same frequency, move down to the next potential fix below to resolve the BLZBNTBGS000003F8 error.
Method 2: Using a VPN
As it turns out, one of the most common instances that will end up triggering the BLZBNTBGS000003F8 error is a situation in which your PC is unable to get through to some servers on Blizzard or Battle.net network. It has now been confirmed that some ISPs are having trouble routing to Blizzard and Battle.net servers. This issue is being consistently reported in Australia and certain Asian countries. In Australia, the vast majority of reports are with the Optus Australia ISP. Fortunately, if this scenario is applicable, you can fix the issue quite easily by using a VPN – This will end up changing the routing to these problematic servers and allow the connection to be established. Note: You don’t have to use a paid VPN if you don’t want to. It works just as well with free options (as you’re going to see below). Here’s a quick guide on installing and using a free VPN to avoid the BLZBNTBGS000003F8 error code: If the same problem is still occurring, move down to the next method below.
Method 3: Changing the DNS server
Another popular fix for the BLZBNTBGS000003F8 error is to modify the default DNS server from the Network and Internet menu. This fix was confirmed to be successful on all recent Windows versions. A lot of affected users that we’re encountering the issue when trying to play on ASIA servers have confirmed that the issue was resolved after they modified the Preferred DNS Server to 1.1.1.1 and the Alternate DNS Server to 1.0.1.0. Here’s a quick guide on how to change the DNS server in order to fix the Call of Duty BLZBNTBGS000003F8 error via the Network Connection section:
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