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Total

DNS

Email

Security

Network

Availability

Domaindnb.de

IPv41

IPv60

MX records1

StatusActive

Domain technical report

DNB - Startseite

dnb.de

Die Deutsche Nationalbibliothek ist die zentrale Archivbibliothek Deutschlands.

Generated: 2026-08-10T10:45:58-05:00 · Cached result

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IPv41

IPv60

MX1

NS3

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

3 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.

DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

70 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

PTR reverse DNS0 / 30 pts · Network

PTR not detected.

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

HTTP response0 / 40 pts · Availability

HTTP/1.1 400 Bad Request

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

80.245.152.115

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

10 mail.dnb.de.

TXT

10 record(s)

"logmein-verification-code=6a1e13ec-a4f7-4623-9395-131c0d728e77"
"D-TRUST=LVL27RY2V7QKYGORTEHYVGV"
"D-TRUST=KKKUHK6P9JKEG4UBTTKDD7G"
"dpt1o6o9n724ailkbvenucgojo"
"_telesec-domain-validation=354984_2025-11-12_v6FUw1EhBjGSPkL32qicqJF202awPgPwvcBFmQC6X2KrH98T6K"
"HARICA-4pIC9WKqhwsganOEvXh"
"MS=30B747176C24FC3CAAA9EB788B4F238C5A2AEFBB"
"HARICA-vsb4DtMSLpgoh8ciqvr"
"google-site-verification=Ns363X-mIFGqfV3eWNlK701YmMO6sra99f_b28rnchY"
"v=spf1 ip4:193.175.100.144 ip4:193.175.100.0/32 include:_spf.pretix.eu include:oclcspf3.oclc.org include:spf.init.de ~all"

NS

3 record(s)

dns-1.dfn.de.
ns0.dnb.de.
ns1.dnb.de.

SOA

1 record(s)

ns.dnb.de. hostmaster.dnb.de. 2026070288 3600 3600 2419200 3600

CAA

6 record(s)

0 issue "letsencrypt.org"
0 issue "telesec.de"
0 issue "harica.gr"
0 issue "pki.dfn.de"
0 issue "d-trust.net"
0 issue "sectigo.com"

DS

1 record(s)

20819 8 2 DF3E72612D0C435388466C89815942A91FCF6B2BAF010CC3A225999B 4D3E1103

DNSKEY

2 record(s)

256 3 8 AwEAAaMPwLHzZSrSFIsbqM8avSwE6hKfpe2h7tEuCHa5iKtRXp3lnGi5 iDXOgiLDka1gnnGtkeK+gTxYQ6gCBJqmNS4cIdz8luzeBhl5W3vzPuzl m+PcmW7ZOtjoPXWfSbFExEwnGK0rnsGGnXv/ovayi34REaWcqCjINNwC Ti7QVQt5
257 3 8 AwEAAca+M/xqp1PVJyR50Vm5xgEKZq8EOJssOHVTUmodWP8YFsebWo2+ A+yxpeKJHkWFZdDPWodEOynztcnjYLbcfVaQU9iRcDPYsVVmSuijP+B/ A7p2kWbIO62NZP/mELf9w+q/JD6lx2pXvMbgZb6eLRxylxlAIl1YhbA0 loJHnr51kplpPJtC+OHHFzPkaL2vOmT+dfwBxQ7UueAVYQseUvc+WnpS EFwAgwmHsx1fePwdI7Xoy0tjhi4/bfPjtgQwhp7YgsTbaMK7E3vjwaRa jGmxkHsLuC19y8FjXUKUzktzWjrd/ZaUa2Q1KoWewwjAsVZzkoRWHH3E 1OQgtb0vmlc=

RRSIG

4 record(s)

NS 8 2 3600 20260824034225 20260725024521 32778 dnb.de. mlYo2gxwJIaMETtHrrPnK3r1nORhj+KpoYPfULn4RwO599gNez8Weukc /1snfeAs7dc1Y9fNXKeD2jSxpbVKeAy7WFcJUPQOhs50EkrHHDZ8BS1U 5D/etoMuQDVyMoVd++hfPVF+1B8kXGddy48fsKm3hb+p9vu56iKZ360s teI=
SOA 8 2 3600 20260909112618 20260810102618 32778 dnb.de. Bp3zFV8FwxHUxRst3w0cbLJpxOVvad1RCi0h6fw8ecg2TSDeVe0DHjsX N+kutSVTIpglbf2i5W0+Kdg3xarPJitO2lLH3vCEKTA12CFFITf1uhfX ch6pdhu1uMQ+Z9VLCOtFW+lLZQR65noGu/fi9fO5KwSpd36LyDpPudwu 4wM=
DS 8 2 86400 20260817120903 20260803103903 32911 de. LuDFEQz8T0TcQG2bYuy/7xUT4OXlmhrzBFnFNq76cEASWLrftNWq/XNJ REsZ/BNeidrT5SiFiwQqKP1zeBLdkLsg75wes//CFOt9cXUasIaBYnCW tdoJhLPfG55/WZXvHy72vuX1q4QN/oRfWdqe/kviQAk72uuwzEpmjXN+ QP0=
CAA 8 2 3600 20260825011101 20260726010857 32778 dnb.de. Vqaw+VfcQYKyGqHu3y4+IHisAayK5ZhoR0Kp1AEL2x472+80+aO0unlm glF0jGnN0GtRwzx7GlRsu+k7Su2iAb1vDRc5tQus8qGe1a7jekWhYO3l uNh7KMcsxRkhrzXiL6R3SL2gLZNYOQM52d0LHMdvXr5rCt3N7/Tvt1dA pTc=

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

1 record(s)

100 10 "s" "x-eduroam:radius.tls" "" _radsec._tcp.eduroam.de.

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 ip4:193.175.100.144 ip4:193.175.100.0/32 include:_spf.pretix.eu include:oclcspf3.oclc.org include:spf.init.de ~all

DMARC

Configured

v=DMARC1; p=none;

DKIM

Not found

—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

DNB - Startseite

Description

Die Deutsche Nationalbibliothek ist die zentrale Archivbibliothek Deutschlands.

Final URL

https://www.dnb.de/DE/Home/home_node.html

HTTP status

200

HTTP

Status

HTTP/1.1 400 Bad Request

Final URL

https://dnb.de/error_path/400.html?al_req_id=annyKtF62SV5NfBDY8gm_QAACV4

Version

Server

Apache

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

D-Trust GmbH

www.dnb.de

Valid from

2026-04-04T11:32:31-05:00

Valid until

2026-10-19T11:32:31-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

0 active

—

HSTSNot detected

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

—

X-Frame-OptionsNot detected

—

Referrer PolicyNot detected

—

Permissions PolicyNot detected

—

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

80.245.152.115

198,45 ms

Cloudflare

1.1.1.1

80.245.152.115

2.291,91 ms

Quad9

9.9.9.9

80.245.152.115

166,49 ms

OpenDNS

208.67.222.222

80.245.152.115

649,81 ms

AdGuard

94.140.14.14

80.245.152.115

158,66 ms

IP, geolocation and ASNAssociated network information

80.245.152.115

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

mail.dnb.de

Port 25: Closed/unreachable - 115.7 ms - 
Port 465: Closed/unreachable - 4135.2 ms - 
Port 587: Closed/unreachable - 4020.9 ms -

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