[宽带症候群] ipv6 地址也有人扫描?

最近看到有这种日志,里面没带 Hostname ,应该不是通过域名查找的
没公开过 IP 也没设置过 DNS 之类的,所以这种是怎么扫描的?
ipv6 地址空间那么大,总不能是随机扫描的吧?

2a05:d01c:b43:8a10:bb5e:c1d5:3159:4687 [01/Jul/2022:00:20:58] "GET /" "'Cloud mapping experiment. Contact research@pdrlabs.net'"
2a05:d01c:b43:8a10:bb5e:c1d5:3159:4687 [01/Jul/2022:00:37:21] "GET /" "'Cloud mapping experiment. Contact research@pdrlabs.net'"
2a05:d01c:b43:8a10:bb5e:c1d5:3159:4687 [01/Jul/2022:00:53:43] "GET /" "'Cloud mapping experiment. Contact research@pdrlabs.net'"