refactoring.guru

Observed Jul 24, 2026, 20:06 UTC (8d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Runs onCloudflare

Email byGoogle Workspace

Secured byLet's Encrypt

Also usesGoogle Search Console

IPv6 · tranco_100k

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

INFRASTRUCTURE MAPwhat refactoring.guru actually stands on - every host below is a signed observation

refactoring.guru

A / AAAA

172.67.222.11104.21.25.252606:4700:3036::ac43:de0b2606:4700:3033::6815:1919

Cloudflareserves the site

cheryl.ns.cloudflare.comguss.ns.cloudflare.com

cloudflare.comanswers its DNS

aspmx.l.google.comalt1.aspmx.l.google.comalt2.aspmx.l.google.com

Google Workspacereceives its email

TLS

refactoring.guru

Let's Encryptissued its certificate

DNS Records

A 2

172.67.222.11
104.21.25.25

AAAA 2

2606:4700:3036::ac43:de0b
2606:4700:3033::6815:1919

MX 3

10aspmx.l.google.com
20alt1.aspmx.l.google.com
20alt2.aspmx.l.google.com

TXT 4

google-site-verification=D_gdsT4xXJ4QI_GkM8OvV5Oczz-MEBMZATAAs45gjrA
v=spf1 include:_spf.google.com include:mailgun.org include:smtp.userecho.com ~all
yandex-verification: f60f0d9e27249415
v=DMARC1; p=quarantine; pct=100; fo=1; ri=3600; rua=mailto:e3e30fea@dmarc.mailgun.org,mailto:5fd7086b@inbox.ondmarc.com; ruf=mailto:e3e30fea@dmarc.mailgun.org,mailto:5fd7086b@inbox.ondmarc.com;

NS 2

cheryl.ns.cloudflare.com
guss.ns.cloudflare.com

SOA 1

cheryl.ns.cloudflare.com dns.cloudflare.com

TLS Certificates (4)

Common Name	Issuer	Expires
`refactoring.guru`	C=US, O=Let's Encrypt, CN=YE1	Sat, 12 Sep 2026 01:42:36 +0000
`YE1`	C=US, O=ISRG, CN=Root YE	Sat, 02 Sep 2028 23:59:59 +0000
`Root YE`	C=US, O=Internet Security Research Group, CN=ISRG Root X2	Thu, 02 Sep 2032 23:59:59 +0000
`ISRG Root X2`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +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 refactoring.guru. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_0fa92e252e6cfd1f
Output Hash: 24f09ce3dbe325f05b35d6c5ecd029a99d70881da952202e6dccb98adc1e1ce8
Signature: ed25519:7bf6321bf78d5e55c5aae627bb389c49b314e03f35406bd7d84e09e1a9112ffcfef7408eac59466b15b0f99afc5544644e7a79f4db463ba40d665885bb12f80d
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/refactoring.guru