Passive DNS

Historic DNS Timeline

Shows every DNS record the platform has observed over time (the DNS audit appends, it doesn't overwrite). For deep historic passive DNS beyond your own observations, add a provider like SecurityTrails/WhoisXML (API key).

Observed Records for securereading.com

TypeValueTTLFirst/Last Observed
A 104.21.6.22 300 2026-08-08 20:56:09
A 172.67.134.47 300 2026-08-08 20:56:09
AAAA 2606:4700:3036::6815:616 300 2026-08-08 20:56:09
AAAA 2606:4700:3032::ac43:862f 300 2026-08-08 20:56:09
MX securereading-com.mail.protection.outlook.com 300 2026-08-08 20:56:09
NS nucum.ns.cloudflare.com 21600 2026-08-08 20:56:09
NS harlan.ns.cloudflare.com 21600 2026-08-08 20:56:09
SOA harlan.ns.cloudflare.com 1800 2026-08-08 20:56:09
TXT google-site-verification=TtPDI1U_NNEGARYz0ejwUn6G-bsybnmVOhzHv5q8mTk 300 2026-08-08 20:56:09
TXT MS=ms21264303 300 2026-08-08 20:56:09
TXT v=spf1 +a +mx +ip4:85.187.128.60 include:spf.a2hosting.com include:spf.protection.outlook.com~all 300 2026-08-08 20:56:09

Most-Observed Hosts

HostRecordsLast Seen
zoominfo.com 5215h ago
185.220.101.27 5015h ago
185.220.101.23 501d ago
185.220.101.29 501d ago
185.220.101.25 501d ago
185.220.101.19 5015h ago
185.220.101.7 501d ago
185.220.101.24 5015h ago
185.220.101.26 5015h ago
185.220.101.5 501d ago
185.220.101.13 501d ago
185.220.101.22 5015h ago
gitlab.com 405h ago
twitter.com 3816h ago
totvs.com 387h ago
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