rug.nl
Top 100 University | University of Groningen
rug.nl is registered with Rijksuniversiteit Groningen since June 2, 1988 (38.4 years). The site runs on jQuery, jQuery UI, Java and 3 other technologies. Its email security grade is C. Its SSL certificate is issued by Hellenic Academic and Research Institutions CA and is valid for 21 more days.
- Domain age
- 38.4 yrs
- Technologies
- 6
- Email security
- C
- SSL days left
- 21
Registration
| Registrar | Rijksuniversiteit Groningen |
|---|---|
| IANA ID | 0000 |
| Registered | June 2, 1988 |
| Updated | December 16, 2025 |
| Status | active |
| Name servers | dns1.rug.nl, dns2.rug.nl, dns3.rug.nl, ns1.surfnet.nl, ns2.surfnet.nl |
| DNSSEC | Not signed |
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 129.125.2.51 | 83135 |
| MX | aspmx3.googlemail.com 30 | 86400 |
| MX | aspmx.l.google.com 10 | 86400 |
| MX | alt1.aspmx.l.google.com 20 | 86400 |
| MX | alt2.aspmx.l.google.com 20 | 86400 |
| MX | aspmx2.googlemail.com 30 | 86400 |
| NS | dns3.rug.nl | 86400 |
| NS | ns1.surfnet.nl | 86400 |
| NS | ns2.surfnet.nl | 86400 |
| NS | dns1.rug.nl | 86400 |
| NS | dns2.rug.nl | 86400 |
| TXT | University of Groningen | 86400 |
| TXT | HARICA-VyUX3Mv4LXaUX7ugYDj | 86400 |
| TXT | google-site-verification=pMjlXqlOTWrDjxV9AoW_MGyuGOV3lEAsQ7__vv525Ag | 86400 |
| TXT | google-site-verification=LzOS5q7nSbDRZFZ0FMFKbWSvsfDE8bL861TAh-czT7k | 86400 |
| TXT | MS=ms97484282 | 86400 |
| TXT | bw=7iePWW2zaVtqaRhZZjRWUu985gQ1Ia26nUAJ3BDXMYBp | 86400 |
| TXT | v=spf1 include:spf1.rug.nl include:spf2.rug.nl include:spf3.rug.nl include:spf4.rug.nl ~all | 86400 |
| TXT | mistral-domain-verification=139d17efc022c67581effa2fc6e0bb747d0c9456 | 86400 |
| AAAA | 2001:610:1a08:292:129:125:2:51 | 86400 |
Technology stack
Analytics and advertising IDs
google_tag_manager:GTM-WLHD85VSSL certificate
| Valid | Valid |
|---|---|
| Issuer | GR, GEANT TLS ECC 1, Hellenic Academic and Research Institutions CA |
| Expires | December 1, 2026 |
| Days remaining | 21 |
| Protocol | TLSv1.3 |
| Names | www.rug.nl, www.groningenuniversity.nl, www.rijksuniversiteitgroningen.nl, www.universityofgroningen.nl, rug.nl, production.ucms.rug.nl, www.universiteitgroningen.nl |
Email security
- warnSubdomains use a weaker policy (sp=none) than the main domain (p=quarantine).
- 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 policy is quarantine: failing mail goes to spam. Move to p=reject for full protection.
- goodDMARC aggregate reports are sent to mailto:[email protected].
- goodDKIM keys found (selector: k2, s1, s2, fm1).
- good5 MX record(s) found. Mail is handled by Google Workspace.
Homepage metadata
| Title | Top 100 University | University of Groningen |
|---|---|
| Description | The University of Groningen has a high reputation for academic teaching and research and a large international network and offers degree programmes at Bachelor, Master and PhD levels in virtually every field. |
| Language | en |
| Indexable | Yes |
| Word count | 479 |
About rug.nl
Who is the registrar of rug.nl?
rug.nl is registered with Rijksuniversiteit Groningen (IANA ID 0000).
What technology does rug.nl use?
We detected 6 technologies on rug.nl, including jQuery, jQuery UI, Java, Content Security Policy, HSTS, Google Tag Manager.
Does rug.nl protect its email with SPF and DMARC?
rug.nl scores 73/100 (grade C) for email security. Subdomains use a weaker policy (sp=none) than the main domain (p=quarantine). No MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
What are the name servers of rug.nl?
rug.nl uses dns3.rug.nl, ns1.surfnet.nl, ns2.surfnet.nl, dns1.rug.nl, dns2.rug.nl.