The Curious Case of basejumper.apple.com

After updating two of my iOS devices to iOS 17.1 I noticed some odd DNS queries coming from these devices in my local DNS resolver’s logs.

Oct 29 21:05:54 dnsmasq[1711]: query[A] basejumper.apple.com from 10.0.0.126
Oct 29 21:05:54 dnsmasq[1711]: cached basejumper.apple.com is NODATA-IPv4

The odd thing here is that basejumper.apple.com does not resolve to anything. All A/AAAA/HTTPS queries for the name return a NOERROR empty response. So what is this endpoint?

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