Rank #9,340Updated November 10, 2026
calvin.edu
Calvin University | Grand Rapids, Michigan
The site runs on Drupal, Varnish, cdnjs and 12 other technologies. Its email security grade is D. Its SSL certificate is issued by Let's Encrypt and is valid for 33 more days.
- Domain age
- —
- Technologies
- 15
- Email security
- D
- SSL days left
- 33
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 23.185.0.3 | 2527 |
| MX | mxb-002f7301.gslb.pphosted.com 10 | 3600 |
| MX | mxa-002f7301.gslb.pphosted.com 10 | 3600 |
| NS | dns2.calvin.edu | 3600 |
| NS | dns.calvin.edu | 3600 |
| TXT | bw=sI3BCDP5hiNl8KC9zB3Lx0v1PZ939bxKJmohuLnqvQWF | 3600 |
| TXT | 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 | 3600 |
| TXT | atlassian-domain-verification=DjNBBBOlarzEnFCvY9k/XKjLNq3a45aOAH/hB8dfX42LNc8NtbnpmXk8WhXHZ0oy | 3600 |
| AAAA | 2620:12a:8000::3 | 1388 |
| AAAA | 2620:12a:8001::3 | 1388 |
Technology stack
Analytics and advertising IDs
google_tag_manager:GTM-M374DLSSL certificate
| Valid | Valid |
|---|---|
| Issuer | US, YR1, Let's Encrypt |
| Expires | December 13, 2026 |
| Days remaining | 33 |
| Protocol | TLSv1.3 |
| Names | calvin.edu |
Email security
DScore 63/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
- warnSPF uses 10 of the 10 allowed DNS lookups. Adding another service may break it.
- warnDMARC policy is none (monitoring only). Spoofed mail is still delivered.
- warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
- warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
- warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
- goodSPF record found.
- goodSPF ends with ~all: servers you have not listed are marked as suspicious (soft fail).
- goodDMARC aggregate reports are sent to mailto:[email protected].
- goodDKIM keys found (selector: k2, s1, s2).
- good2 MX record(s) found. Mail is handled by Proofpoint.
Homepage metadata
| Title | Calvin University | Grand Rapids, Michigan |
|---|---|
| Description | Calvin University is a world-class Christian university in Grand Rapids, Michigan. Calvin ranks #1 in the Midwest among regional colleges. |
| Language | en |
| Canonical | https://calvin.edu/ |
| Indexable | Yes |
| Word count | 1091 |
About calvin.edu
What technology does calvin.edu use?
We detected 15 technologies on calvin.edu, including Varnish, cdnjs, Fastly, Drupal, Font Awesome, Pantheon.
Does calvin.edu protect its email with SPF and DMARC?
calvin.edu scores 63/100 (grade D) for email security. SPF uses 10 of the 10 allowed DNS lookups. Adding another service may break it. DMARC policy is none (monitoring only). Spoofed mail is still delivered.
What are the name servers of calvin.edu?
calvin.edu uses dns2.calvin.edu, dns.calvin.edu.