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 duo.com
| Type | Value | TTL | First/Last Observed |
|---|---|---|---|
| A | 18.238.109.36 |
60 | 2026-08-08 12:04:20 |
| A | 18.238.109.81 |
60 | 2026-08-08 12:04:20 |
| A | 18.238.109.129 |
60 | 2026-08-08 12:04:20 |
| A | 18.238.109.2 |
60 | 2026-08-08 12:04:20 |
| MX | rcdn-mx-01.cisco.com |
300 | 2026-08-08 12:04:20 |
| MX | alln-mx-01.cisco.com |
300 | 2026-08-08 12:04:20 |
| MX | aer-mx-01.cisco.com |
300 | 2026-08-08 12:04:20 |
| NS | ns-1365.awsdns-42.org |
21018 | 2026-08-08 12:04:20 |
| NS | ns-932.awsdns-52.net |
21018 | 2026-08-08 12:04:20 |
| NS | ns-55.awsdns-06.com |
21018 | 2026-08-08 12:04:20 |
| NS | ns-1733.awsdns-24.co.uk |
21018 | 2026-08-08 12:04:20 |
| SOA | ns-55.awsdns-06.com |
900 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=UxTqzaF64RMmCuE_cfz67aerfbJyPW7jSWJaDRf8U4Q |
300 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=gY1gXbTT44Hc2xjnx-TmKdBLXKzpthxWKGhlqJL0EDw |
300 | 2026-08-08 12:04:20 |
| TXT | apple-domain-verification=0NFHW4xLPA7qMAUl |
300 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=zagew00MIXPj4NT7NSuvolRYA9BWUFvOvUU9On5SkLs |
300 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=QSlNcf5REPqDzZZtYQdQ02iTtFdCkF4iGzRgOHWeAfk |
300 | 2026-08-08 12:04:20 |
| TXT | identrust_validate=SMpkw2Y899uXgKrzdHnqptIfXiIOyDNlX1foFF1S209M |
300 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=_6xJQkVWQvhjZ8WH17r2qEjOu0CYifwUq5DqV-aUPIE |
300 | 2026-08-08 12:04:20 |
| TXT | v=spf1 ip4:72.35.40.113/28 ip4:66.51.154.240/29 include:_spf.google.com include:_spf.salesforce.com include:mktomail.com include:stspg-customer.com include:_spf.intacct.com include:servers.mcsv.net ~all |
300 | 2026-08-08 12:04:20 |
| TXT | identrust_validate=VOOjXXB2PpF7kC14MiiEHi40phwnkIP1dhJ1AbyZxWKP |
300 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=uo-yyMBObeQzZDH55aAFLRLyf0IiN20p0GJ0H6N2jQQ |
300 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=F16Zf7RnF8CVcYnsbn6C308KFSeldSRrLiJK1cCgoBQ |
300 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=FyHTkA00weOnJqC50U6D_1Etz0FeTAV36UzX-mR0t7Y |
300 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=88KLpNEv0nOJ-yRHH3mp3TIvrG4rhNTP3DbODLQeIYg |
300 | 2026-08-08 12:04:20 |
| TXT | google-site-verification=WvGzO9Z62GF-06EZawhrguz4lX-3soAJz8l5Zdd0kpc |
300 | 2026-08-08 12:04:20 |
| TXT | workplace-domain-verification=M0nohbh4MpXazNtpfeLQrdlEAbaeQ3 |
300 | 2026-08-08 12:04:20 |
Most-Observed Hosts
| Host | Records | Last Seen |
|---|---|---|
aaa.com |
102 | 1d ago |
fedex.com |
82 | 2d ago |
prudential.com |
64 | 2d ago |
marriott.com |
62 | 2d ago |
udemy.com |
60 | 1d ago |
pb.com |
60 | 5h ago |
ringcentral.com |
57 | 1d ago |
zoominfo.com |
52 | 3d ago |
185.220.101.5 |
50 | 4d ago |
185.220.101.7 |
50 | 4d ago |
185.220.101.19 |
50 | 3d ago |
185.220.101.13 |
50 | 4d ago |
185.220.101.29 |
50 | 4d ago |
185.220.101.25 |
50 | 4d ago |
185.220.101.24 |
50 | 3d ago |
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