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Total

100

DNS

Email

Security

Network

100

Availability

Domainuu.nl

IPv41

IPv61

MX records1

StatusActive

Domain technical report

Universiteit Utrecht | Sharing science, shaping tomorrow

uu.nl

De Universiteit Utrecht is een internationaal vooraanstaande onderzoeksuniversiteit waar studenten en onderzoekers samen werken aan een betere wereld.

Generated: 2026-08-08T21:02:47-05:00 · Cached result

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IPv41

IPv61

MX1

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

1 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

4 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

✓

DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓

CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

1 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

✓

MTA-STS5 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

181 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers19 / 35 pts · Security

5 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: 83.217.76.86.static.hosted.by.combell.com

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

83.217.76.86

AAAA

1 record(s)

2a00:1c98:10:25::84

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

0 uu-nl.mail.protection.outlook.com.

TXT

21 record(s)

"atlassian-domain-verification=0iPg6zRItjFaaj30LVQ0AjAJ4N66NNbKdP5fnJ0H6Qg9optMLXJGhlkMR0Jqi/yO"
"QTXhE9VligPDA5a2xw9zRjxg01lC8iPwj7ouX3LnksdJltyh26E0WnV/t78xAeBXBb+8OJoWhfRRCJETQcCA1Q=="
"signrequest-domain-validation=40cdf51de7e51a3f84de9f6f8abd2a374aa3d89acb3d6927003fb52af7f022eb"
"WLgjk988Kp7Qba9XFltAfkL2Toa2uc3OdjwkPdG8qI4iNXGc14jtd3MM7kC70OPfYW0cWVz5mHMuv5jaMkWcQg=="
"cisco-ci-domain-verification=5842c46b62263bd02abd37a7754654a4dff107f06a2b66a8477e2cdc761505a8"
"atlassian-sending-domain-verification=72791b6c-e695-4116-8bbc-dd41675e5b98"
"adobe-idp-site-verification=1f7a24c74c7d57187943e2d4ec7adcd37d3725b9a3a7d5857dd41637da012a6b"
"v=easydus; cg=4b46d154-7e0f-4088-8f50-0a0638724512"
"pardot997561=644046e4432766fb73dbc13a959693022e9e4bdeebddbd369e6a7603dc62aafa"
"brevo-code:af27a511cfadd67db014e628614c7404"
"google-site-verification=K3bIDuPg2RhRc-qYqyEau7MUnp3aN4oIM_6rWDe1M34"
"mistral-domain-verification=4f9997f25fec87a7fa949b979b242e6c4eeb1c28"
"apple-domain-verification=wydMRl66PAsBwOVk"
"faxination=fen44162647"
"v=spf1 ip4:131.211.14.0/24 ip4:145.0.1.0/24 ip4:195.169.13.0/24 ip6:2001:610:188:540::/64 ip4:131.211.31.135 ip4:131.211.194.8/30 ip4:145.101.112.2 ip6:2001:610:188:446:145:101:112:2 ip4:216.146.32.161/27 ip4:170.107.183.89 ip4:212.123.232.134 " "ip4:145.100.12.197  include:mailplus.nl include:mailswitch.nl include:spf.mandrillapp.com include:spf.protection.outlook.com include:spf.flowmailer.net ip4:131.174.59.196/30  -all"
"autodesk-domain-verification=RfCX8IHaalDkeE1T-2PE"
"pipo"
"00D7Q000006uk9x=1TBQs00000007Sx"
"HARICA-qgr0NyZthcl3PvsrBJ5"
"MS=ms59510356"
"bw=oqt3PIuXcjotJ6dvsl4A4bDskSdkcc56EiFM1AAAvZG3"

NS

4 record(s)

azie.net.uu.nl.
australie.net.uu.nl.
ns1.zurich.surf.net.
ns1.surfnet.nl.

SOA

1 record(s)

dns.uu.nl. hostmaster.uu.nl. 2014760242 3600 600 1209600 3600

CAA

9 record(s)

0 issue "letsencrypt.org"
0 issue "sectigo.com"
0 issuewild "digicert.com"
0 issuewild "harica.gr"
0 iodef "mailto:hostmaster@uu.nl"
0 issuewild "sectigo.com"
0 issue "harica.gr"
0 issuewild "letsencrypt.org"
0 issue "digicert.com"

DS

1 record(s)

47936 13 2 67F250B85CDAC792FB9488F653D182B93BEFCC4CA7A1E6BBEFDCD8BA 6D87CC32

DNSKEY

3 record(s)

257 3 13 Jr2tNMgbQrGxI7B2lz6dDqEnHDRmJi/WTxGhc6FwfaKVx/f2ogc5xWoz zxzjJkWBFKyqtL/t+MauCiPjLBGeAw==
256 3 13 KVBIXAwC9m0doSnGvp6HC503TPv/grAb1C2FWmNQapG/jerSDkZuk0YE Gs4GyolPjERrkOiQ7atMysnzUGPPAQ==
256 3 13 RrqNlGjcUxMc1K50pfZ4YTSi8Ulq5q8oMLy5rjsuT5VZ5KshEynttFGg D3HGISVxCBwNGVnZC1pN5h/4l7AzIw==

RRSIG

4 record(s)

NS 13 2 300 20260822175146 20260723171817 58065 uu.nl. lCC+ZlwnMS3FFGDCFtUfvzIkcf0/JFaw/E/5d1hakOAgrqgU45fp7JbZ FHlGie8nVcldEJqzvy3suHEoYzpWaA==
TXT 13 2 3600 20260828075915 20260729073358 58065 uu.nl. S58pjoSdIqhljwBg2ojrfwxane8IzGtTbHRdLBuZ9dUbZ/rrYK5LtVAL b5IJzsU5y69R+TKTQr6wqfwxJf+jKw==
MX 13 2 3600 20260901164022 20260802154849 58065 uu.nl. o5C54d3ZN6pGBjpmUjApm/7nsBQzaxAJYoelNtYdJ2eNFceYc1N6iGnf xrHzBlM6mPu9JliAtMDt7ZR0RiawjQ==
DS 13 2 3600 20260831200657 20260804000820 467 nl. lfogKCbTEkjlmMknM31YVg5n0UsIznp61CseWDo/IiTUnqM2UpHOvjwE Un2XeB+UmvSMKMpdydrv5mceDoZdCw==

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 ip4:131.211.14.0/24 ip4:145.0.1.0/24 ip4:195.169.13.0/24 ip6:2001:610:188:540::/64 ip4:131.211.31.135 ip4:131.211.194.8/30 ip4:145.101.112.2 ip6:2001:610:188:446:145:101:112:2 ip4:216.146.32.161/27 ip4:170.107.183.89 ip4:212.123.232.134 ip4:145.100.12.197  include:mailplus.nl include:mailswitch.nl include:spf.mandrillapp.com include:spf.protection.outlook.com include:spf.flowmailer.net ip4:131.174.59.196/30  -all

DMARC

Configured

v=DMARC1; p=quarantine; pct=100; rua=mailto:4ikuptsm@ag.eu.dmarcadvisor.com,mailto:dmarc.reporting@uu.nl;

DKIM

Selector selector1

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC9uK1cwYkKFVXBGuGE/hlVBtdYoxKtobhDOxupIBkvyf/xFn6TaVlsIswrnjmw+SVTvvuqKDX2xIZUMsJo8QFlm7+XfsVe6eu0CailHx7vheFJktVJYotQBtu2O/5MoXw/aAopeb1xq5AVf2q9U6LkaEEQSXRBf/nfFHLR6wIUqQIDAQAB; n=1024,1450040940,1465852140

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Universiteit Utrecht | Sharing science, shaping tomorrow

Description

De Universiteit Utrecht is een internationaal vooraanstaande onderzoeksuniversiteit waar studenten en onderzoekers samen werken aan een betere wereld.

Final URL

https://www.uu.nl/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://www.uu.nl/

Version

Server

Apache

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Hellenic Academic and Research Institutions CA

uu.nl

Valid from

2026-07-22T01:46:50-05:00

Valid until

2027-02-06T00:46:49-06:00

Days remaining

181

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

5 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

✓

Referrer PolicyImplemented

✓

Permissions PolicyImplemented

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

83.217.76.86

66,85 ms

Cloudflare

1.1.1.1

83.217.76.86

130,54 ms

Quad9

9.9.9.9

83.217.76.86

164,74 ms

OpenDNS

208.67.222.222

83.217.76.86

234,41 ms

AdGuard

94.140.14.14

83.217.76.86

157,81 ms

IP, geolocation and ASNAssociated network information

83.217.76.86

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

uu-nl.mail.protection.outlook.com

Port 25: Closed/unreachable - 22.7 ms - 
Port 465: Closed/unreachable - 4020.6 ms - 
Port 587: Closed/unreachable - 4034.1 ms -

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