calvin.edu

Observed Jul 22, 2026, 00:49 UTC (19m ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onFastly

Email byProofpoint

Secured byLet's Encrypt

Also usesAtlassian

IPv6 · tranco_40k

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

INFRASTRUCTURE MAPwhat calvin.edu actually stands on - every host below is a signed observation

calvin.edu

A / AAAA

23.185.0.32620:12a:8000::32620:12a:8001::3

Fastlyserves the site

dns.calvin.edudns2.calvin.edu

calvin.eduanswers its DNS

mxb-002f7301.gslb.pphosted.commxa-002f7301.gslb.pphosted.com

Proofpointreceives its email

TLS

calvin.edu

Let's Encryptissued its certificate

DNS Records

A 1

23.185.0.3

AAAA 2

2620:12a:8000::3
2620:12a:8001::3

MX 2

10mxb-002f7301.gslb.pphosted.com
10mxa-002f7301.gslb.pphosted.com

TXT 4

bw=sI3BCDP5hiNl8KC9zB3Lx0v1PZ939bxKJmohuLnqvQWF
v=spf1 ip4:148.163.143.211 ip4:148.163.146.16 ip4:153.106.124.191 ip4:153.106.124.17 ip4:153.106.142.10 ip4:153.106.135.33 ip4:153.106.124.21 ip4:153.106.124.9 include:_spf1.calvin.edu ~all
atlassian-domain-verification=DjNBBBOlarzEnFCvY9k/XKjLNq3a45aOAH/hB8dfX42LNc8NtbnpmXk8WhXHZ0oy
v=DMARC1; p=none; rua=mailto:e3skxwvt@ag.us.dmarcian.com; ruf=mailto:e3skxwvt@fr.us.dmarcian.com;

NS 2

dns.calvin.edu
dns2.calvin.edu

SOA 1

dns.calvin.edu dns-admin.calvin.edu

TLS Certificates (3)

Common Name	Issuer	Expires
`calvin.edu`	C=US, O=Let's Encrypt, CN=YR1	Wed, 14 Oct 2026 11:52:26 +0000
`YR1`	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 calvin.edu. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_c969b807949fbe37
Output Hash: 2c106420f13e82bebb640c965636e87a6387ca9d29cfb3227e00b89bf549a5dc
Signature: ed25519:b6e7c089733ec037bd96f563ab90e9377e54e3e617fa9054904a3f32296376cda0e9da359816b48d5ea721de106c717e045f8f25ff307e2272babd7364a3140e
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/calvin.edu