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mx-1-4.server-filter.com checked at 2025-12-13T11:19:19.181Z 1062ms 19/19/19 100% R:7 allDone:true timedOut:false

`mx-1-4.server-filter.com`

	A	221.121.128.13^{🇦🇺 Servers Australia AS45671}
			PTR	`mx-1-4.server-filter.com`

	NS	`dan.ns.cloudflare.com`
	NS	`kate.ns.cloudflare.com`

13.128.121.221.in-addr.arpa

mx-1-4.server-filter.com resolves to a single IP: 221.121.128.13.