grc.com

Observed 2026-07-13T06:15:35.949Z (7h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Registered withTucows Domains Inc.

Also usesGoogle Search Console

8 subdomains · tranco_40k

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

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

grc.com

A / AAAA

4.79.142.200

Cloudflareserves the site

ns6.customer.level3.netns4.customer.level3.net

level3.netanswers its DNS

grc.com

grc.comreceives its email

HTTPS probe

redirect Redirecting (3xx) 301 → https://www.grc.com/intro.htm

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time610 ms

DNS resolutionNOERROR

Redirect chain

https://www.grc.com/intro.htm

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 1

4.79.142.200

MX 1

10grc.com

TXT 6

_bpovimyxhv2xbvowiwnvlkhz27b4z4f
v=spf1 ip4:4.79.142.192/28 a:client.grc.com a:grc.com -all
7pdq8vl28psslbzzx8g9s3pbwjvksk24
_e9izydias4fdktb7grdz8lx129rf0kz
google-site-verification=lTHvpojcfPIYXGkOqbku5TcOkpo52Exo-qWuQJi5bpw
v=DMARC1; p=reject; sp=reject; rua=mailto:re+2d18e30bd27e@inbound.dmarcdigests.com; adkim=s; aspf=s; fo=1; pct=100

NS 2

ns6.customer.level3.net
ns4.customer.level3.net

SOA 1

grc.com dns2005.grc.com

CAA 1

issue digicert.com

TLS Certificates (0)

None.

Subdomains (8)

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 grc.com. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 0ea9a6ec-632c-47f6-8521-703e9c0b5b28
Output Hash: 7774ba1bda426dc213a51a5119d7a3d879e2ff15983e56fb3db00503dc5887c7
Signature: ed25519:bbd82707294630643d8bf4bdade72279c59953569f0511ff671b408010e02c6b6c17417e0d75541a578825b5ecd1dd4b96f8b613dafe0934e6f14d0e30230205
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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