Add Validin's free DNS history portal

Released this week, full DNS history available free of charge
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Kenneth Kinion 2023-10-27 16:48:24 -04:00 committed by GitHub
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commit 9002dc6b38

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@ -680,6 +680,7 @@ algorithms, knowledgebase and AI technology.
* [You Get Signal](http://www.yougetsignal.com)
* [WiGLE](https://wigle.net/) - Wi-fi "wardriving" database. Contains a global map containing crowdsourced information on the location, name, and other properties of wi-fi networks. Software available to download to contribute data to the public infoset.
* [urlscan](https://urlscan.io/) - is a free service to scan and analyse websites.
* [Validin](https://app.validin.com/) - Website and API to search current and historical DNS records for free
## [](#-table-of-contents) Keywords Discovery and Research