theory.com

Observed Jul 17, 2026, 14:53 UTC (1d ago). Every field below was attested with an Ed25519 signature at scan time.

Guarded by a firewall

Email byMicrosoft 365

Secured byDigiCert

Also usesGoogle Search ConsoleAtlassianFacebook/Meta

tranco_100k

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat theory.com actually stands on - every host below is a signed observation

theory.com

A / AAAA

96.45.82.4296.45.83.196.45.82.15596.45.83.150

unattributedserves the site

ns0.dnsmadeeasy.comns4.dnsmadeeasy.comns2.dnsmadeeasy.comns1.dnsmadeeasy.com+1 more

dnsmadeeasy.comanswers its DNS

theory-com.mail.protection.outlook.com

Microsoft 365receives its email

TLS

*.theory.com

DigiCert Incissued its certificate

DNS Records

A 4

96.45.82.42
96.45.83.1
96.45.82.155
96.45.83.150

MX 1

5theory-com.mail.protection.outlook.com

TXT 13

998e759d81e34fedb06ffc19411d9d71
apple-domain-verification=XcAY1V8vdF3eN6p7
google-site verification=vKHE6qn0qWMfWEDm33vL9d1BxnuuktcoAWJtFwPtMJs
google-site-verification=qk5T2AtYiOfgDECD8hrwgYpHJNAYaVrRuY2wdP7cpfY
hgNjckvrUxFmbKF+tpfDtN1X2FovQCJQcYmV8lPofYNQ3pkV6osFuF9L5Gpthb+ltWClgGUyY+ZD5IwR+kisyg==
atlassian-domain-verification=DWDHXMar9/0VPemzDGa693escrPzjw0dO16bdfX5MMee6HsZ2pi3gu3qVBgl9z32
zscaler-verification-70805-1372026-xhg532j2s
MS=ms62625959
facebook-domain-verification=22umle1tf4z35l22ot442u9jkw0w5r
google-site-verification=alNhedMF8_AqGOLHzqDUqwMAoWh008dx5mcNgrn6Rc4

NS 5

ns0.dnsmadeeasy.com
ns4.dnsmadeeasy.com
ns2.dnsmadeeasy.com
ns1.dnsmadeeasy.com
ns3.dnsmadeeasy.com

SOA 1

ns10.digicertdns.com dns.digicertdns.com

TLS Certificates (3)

Common Name	Issuer	Expires
`*.theory.com`	C=US, O=DigiCert Inc, CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1	Fri, 01 Jan 2027 23:59:59 +0000
`DigiCert Global G2 TLS RSA SHA256 2020 CA1`	C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root G2	Sat, 29 Mar 2031 23:59:59 +0000
`DigiCert Global Root G2`	C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root G2	Fri, 15 Jan 2038 12:00:00 +0000

Subdomains (0)

None observed.

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for theory.com. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/theory.com">
  <img src="https://domaindrift.io/badge/theory.com.svg"
       width="300" height="64" alt="DomainDrift signed observations for theory.com">
</a>

Ed25519 Receipt

Receipt ID: 50f17624-2061-44c6-bcc3-59adefb48881
Output Hash: be47848538d2a2c26b8c23aa9043c3345a96ec33bd2df910874b7d1b59beac9d
Signature: ed25519:185a20220440d205e02b8fe0bc8a002f056f09d798b45811f9bb85b44e880efcdf5a190ea4221f66e6f8591bc3fb948c4bf1f60b8989b753fabebbe749137e06
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/theory.com