This is a brief article where we are going to list several websites that provide solid tools to gather data from different endpoints. So if you have a username, email address, phone number or IP Address, you will be able to whois that data to get more datapoint on your research.
Username
https://namechk.com/
https://checkleaked.cc/
https://leakcheck.net/
https://ghostproject.fr/
https://www.secureito.com/
https://haveibeenpwned.com/
https://breachdirectory.org/
https://dehashed.com/
https://intelx.io/
http://breachnet.space/
https://leak.watch/
https://www.snusbase.com/
https://weleakinfo.to/
https://whatsmyname.app/
https://leaked.site/
https://knowem.com/
https://www.namecheckr.com/
https://usersearch.org/index.php
https://checkusernames.com/
https://namecheckup.com/
https://instantusername.com/#/
https://github.com/WebBreacher/WhatsMyName
https://github.com/soxoj/maigret
https://github.com/sherlock-project/sherlock
Email Address
https://tools.epieos.com/ (Gmail)
https://thatsthem.com/reverse-email-lookup
https://ashley.cynic.al/
https://hunter.io/
https://www.melissa.com/v2/lookups/emailcheck/email/
https://pipl.com/
https://www.voilanorbert.com/
https://www.reversephonecheck.com/
http://www.edge-security.com/theharvester.php
https://maildb.io/
https://www.skymem.info/
https://www.mailshunt.com/
https://leakcheck.net/
https://ghostproject.fr/
https://www.secureito.com/
https://haveibeenpwned.com/
https://breachdirectory.org/
https://dehashed.com/
https://intelx.io/
http://breachnet.space/
https://leak.watch/
https://www.snusbase.com/
https://weleakinfo.to/
https://leaked.site/
https://github.com/m4ll0k/infoga
Ip-Address
https://leakcheck.net/
https://ghostproject.fr/
https://thatsthem.com/reverse-ip-lookup
https://www.secureito.com/
https://breachdirectory.org/
https://dehashed.com/
https://intelx.io/
http://breachnet.space/
https://leak.watch/
https://www.snusbase.com/
https://weleakinfo.to/
https://leaked.site/
https://db-ip.com/
https://hackertarget.com/reverse-dns-lookup/
https://iptoasn.com/
https://spyse.com/tools/asn-lookup
https://asn.cymru.com/
https://www.onyphe.io/
https://www.ipaddress.my/
https://www.iptrackeronline.com/
https://www.infobyip.com/
http://en.utrace.de/
https://www.infosniper.net/
https://www.iplocation.net/
https://www.ipfingerprints.com/
https://www.maxmind.com/en/home
https://www.ip2location.com/demo/
Phone-Numbers
https://opencellid.org/
https://www.spydialer.com/
http://www.fonefinder.net/
https://www.twilio.com/lookup
https://thatsthem.com/reverse-phone-lookup
https://calleridtest.com/
https://www.411.com/reverse-phone
https://www.reversephonecheck.com/
https://www.hlr-lookups.com/
https://dehashed.com/
https://www.snusbase.com/
Public-Records
https://www.govdata.de/
https://www.opengov-muenchen.de/
https://www.brbpub.com/
https://voterrecords.com/
https://publicrecords.netronline.com/
https://www.blackbookonline.info/USA-Voter-Records.aspx
https://ce.naco.org/index.html
https://www.findagrave.com/
https://www.melissa.com/v2/lookups/deathcheck/
http://www.graveinfo.com/
https://www.binbase.com/search.html
https://vat-search.eu/
https://www.bop.gov/inmateloc/
https://mugshots.com/
https://www.peoplefinders.com/criminal-records
https://www.familywatchdog.us/Default.asp
https://cityprotect.com/map/list/
http://worldlii.org/
https://www.melissa.com/v2/lookups/prope…r/zipcode/
https://www.zillow.com/
https://www.emporis.com/
https://www.homefacts.com/
https://neighbor.report/
https://www.redfin.com/