pen.io

Observed Jul 21, 2026, 16:51 UTC (2d 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

Not responding

Runs onCloudflare

Email byGoogle Workspace

Secured byGoogle Trust Services

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 pen.io actually stands on - every host below is a signed observation

pen.io

A / AAAA

172.67.205.73104.21.37.712606:4700:3037::ac43:cd492606:4700:3035::6815:2547

Cloudflareserves the site

nina.ns.cloudflare.compaul.ns.cloudflare.com

cloudflare.comanswers its DNS

aspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comalt1.aspmx.l.google.com+1 more

Google Workspacereceives its email

TLS

pen.io

Google Trust Servicesissued its certificate

DNS Records

A 2

172.67.205.73
104.21.37.71

AAAA 2

2606:4700:3037::ac43:cd49
2606:4700:3035::6815:2547

MX 5

1aspmx.l.google.com
10aspmx2.googlemail.com
10aspmx3.googlemail.com
5alt1.aspmx.l.google.com
5alt2.aspmx.l.google.com

TXT 2

google-site-verification=TZ7sO-oik6w2f2abY-nFfvyXy1sKmUULYyKS5WHSRxw
v=spf1 include:_spf.google.com ~all

NS 2

nina.ns.cloudflare.com
paul.ns.cloudflare.com

SOA 1

nina.ns.cloudflare.com dns.cloudflare.com

TLS Certificates (3)

Common Name	Issuer	Expires
`pen.io`	C=US, O=Google Trust Services, CN=WE1	Sat, 17 Oct 2026 12:31:07 +0000
`WE1`	C=US, O=Google Trust Services LLC, CN=GTS Root R4	Tue, 20 Feb 2029 14:00:00 +0000
`GTS Root R4`	C=BE, O=GlobalSign nv-sa, 2.5.4.11=Root CA, CN=GlobalSign Root CA	Fri, 28 Jan 2028 00:00:42 +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 pen.io. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_89e899d93204dac2
Output Hash: f298236be2b94c5f0a3bc19250a0f299fd6191899d6b5bf0eea530dc6936bc7a
Signature: ed25519:77417ae7849170170bc4d3cb8791e09ac24bf0fa5491191068a196218b228f8204b38496b7399fdf063c67e639990cd0b1b791b22a48cc232a7d66f6ba701102
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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