I work with Thorndown website (https://thorndown.co.uk/) and we recently updated their DNS to point to a new site on a different server.
This operation was done 12 days ago and we’ve noticed a subset of traffic is still seeing the old website - all of these customers are on either the BT network. No other ISP is affected as far as we can see.
It looks like BT are not refreshing their cache for the DNS records for our website. For reference, this post seems to refer to the same issue: https://community.bt.com/t5/Home-setup-Wi-Fi-network/BT-DNS-Cache-Issues-for-our-website-Users-canno...
Is this something BT can help with as a matter of urgency? This is now affecting our website performance and therefore our whole business.
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