arqu.com

Observed Jul 26, 2026, 22:46 UTC (1d 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

Email byGoogle Workspace

Secured byLet's Encrypt

Also usesGoogle Search ConsoleNotion

domcop

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

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

arqu.com

A / AAAA

76.76.21.21

unattributedserves the site

ns-1432.awsdns-51.orgns-1557.awsdns-02.co.ukns-345.awsdns-43.comns-843.awsdns-41.net

awsdns-51.org + awsdns-02.co.uk + moreanswers its DNS

aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comalt1.aspmx.l.google.com+1 more

Google Workspacereceives its email

TLS

arqu.com

Let's Encryptissued its certificate

DNS Records

A 1

76.76.21.21

MX 5

1aspmx.l.google.com
10alt3.aspmx.l.google.com
10alt4.aspmx.l.google.com
5alt1.aspmx.l.google.com
5alt2.aspmx.l.google.com

TXT 4

google-site-verification=gwGyouk1YZCiPvXvxSgNNuO1watLZhURMN6_fq20c8Qgoogle-site-verification=X5X2Lo0G57H2LqbaXLp0kEfDfHcDbTM39zr47wVaolI
notion-domain-verification=vLz4CHPxlO7zGMwbvph6ieTrln0ssB17Fxnqhihoze2
v=spf1 include:sender.zohosubscriptions.com include:spf.mailjet.com include:zcsend.net include:_spf.google.com ~all
v=DMARC1; p=none; rua=mailto:dmarc-inbound@arqu.com

NS 4

ns-1432.awsdns-51.org
ns-1557.awsdns-02.co.uk
ns-345.awsdns-43.com
ns-843.awsdns-41.net

SOA 1

ns-345.awsdns-43.com awsdns-hostmaster.amazon.com

TLS Certificates (3)

Common Name	Issuer	Expires
`arqu.com`	C=US, O=Let's Encrypt, CN=YR2	Sat, 17 Oct 2026 19:28:30 +0000
`YR2`	C=US, O=ISRG, CN=Root YR	Sat, 02 Sep 2028 23:59:59 +0000
`Root YR`	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 arqu.com. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_9ed2934c74ffef58
Output Hash: 94504f71890c45c7da25343c355355af63c630c422a4a0d44112b2ac4bd8d64c
Signature: ed25519:81bb941bf11e7d4c444c12726636252e0cf7769f6c0974520e27ab64f5fb1539bc7111c69f72008501cbe4aecd0eef2b540f0c93ea00e3423e11bdb5e83cf100
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

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