Domain report: academics.de

Registration

info

.de country-code

Found

TLD: .de (country-code)
ICANN policies apply: no

Checks

i

.de is a country-code TLD (ccTLD)

Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.

#1
✓ TLD delegated and signed #2

.de is delegated in the root zone and DNSSEC-signed.
i

Registration data not available

No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.

#3

Delegation

info

ns-cloud-c1.googledomains.com, ns-cloud-c2.googledomains.com, ns-cloud-c3.googledomains.com, ns-cloud-c4.googledomains.com

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: ns-cloud-c1.googledomains.com, ns-cloud-c2.googledomains.com, ns-cloud-c3.googledomains.com, ns-cloud-c4.googledomains.com
NS in the zone: ns-cloud-c1.googledomains.com, ns-cloud-c2.googledomains.com, ns-cloud-c3.googledomains.com, ns-cloud-c4.googledomains.com

Nameserver	Addresses	Network (AS)	Glue
ns-cloud-c1.googledomains.com	216.239.32.108 2001:4860:4802:32::6c	AS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US	-
ns-cloud-c2.googledomains.com	216.239.34.108 2001:4860:4802:34::6c	AS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US	-
ns-cloud-c3.googledomains.com	216.239.36.108 2001:4860:4802:36::6c	AS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US	-
ns-cloud-c4.googledomains.com	216.239.38.108 2001:4860:4802:38::6c	AS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US	-

Checks

✓ 4 nameservers #6

Delegated to ns-cloud-c1.googledomains.com, ns-cloud-c2.googledomains.com, ns-cloud-c3.googledomains.com, ns-cloud-c4.googledomains.com.
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
✓ No glue needed #8

All nameservers are outside the zone, so no glue records are needed.
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
i

One address family in one network

all IPv6 addresses are in 2001:4860:4802::/48, while the other address family is spread over several networks.

#10
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS15169 (GOOGLE - Google LLC, US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
i

All nameserver names under .com

All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.

#12
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns-cloud-c1.googledomains.com 216.239.32.108	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns-cloud-c1.googledomains.com 2001:4860:4802:32::6c	NOERROR, 14 ms, authoritative	no	yes / yes	refused	-
ns-cloud-c2.googledomains.com 216.239.34.108	NOERROR, 10 ms, authoritative	no	yes / yes	refused	-
ns-cloud-c2.googledomains.com 2001:4860:4802:34::6c	NOERROR, 14 ms, authoritative	no	yes / yes	refused	-
ns-cloud-c3.googledomains.com 216.239.36.108	NOERROR, 41 ms, authoritative	no	yes / yes	refused	-
ns-cloud-c3.googledomains.com 2001:4860:4802:36::6c	NOERROR, 42 ms, authoritative	no	yes / yes	refused	-
ns-cloud-c4.googledomains.com 216.239.38.108	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns-cloud-c4.googledomains.com 2001:4860:4802:38::6c	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-

Checks

✓ All respond #14

All 8 nameserver addresses answered.
✓ All authoritative #15

Every responding nameserver answers authoritatively for the zone.
✓ No recursion #16

The nameservers do not answer recursive queries for other domains.
✓ No version disclosed #17

The nameservers don't reveal their software version.
✓ Zone transfers refused #18

No nameserver allows a zone transfer to the public.
✓ TCP supported #19

All nameservers answer over TCP.
✓ EDNS supported #20

All nameservers support EDNS(0).
✓ Public addresses #21

All nameserver addresses are publicly routable.

SOA

warn

serial 1 · primary ns-cloud-c1.googledomains.com

Found

Primary (MNAME): ns-cloud-c1.googledomains.com
Contact (RNAME): cloud-dns-hostmaster.google.com
Serial: 1
Refresh / retry: 21600 s / 3600 s
Expire: 259200 s
Negative TTL: 300 s

Serial per nameserver

Nameserver	Serial
ns-cloud-c1.googledomains.com (216.239.32.108)	1
ns-cloud-c1.googledomains.com (2001:4860:4802:32::6c)	1
ns-cloud-c2.googledomains.com (216.239.34.108)	1
ns-cloud-c2.googledomains.com (2001:4860:4802:34::6c)	1
ns-cloud-c3.googledomains.com (216.239.36.108)	1
ns-cloud-c3.googledomains.com (2001:4860:4802:36::6c)	1
ns-cloud-c4.googledomains.com (216.239.38.108)	1
ns-cloud-c4.googledomains.com (2001:4860:4802:38::6c)	1

Checks

✓ Serial 1 everywhere #22

All nameservers serve the same version of the zone.
!

Unusual SOA timers

expire 3d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 6h, retry 1h, expire 3d, negative TTL 5m.

#23
✓ Primary is a public nameserver #24

The primary nameserver ns-cloud-c1.googledomains.com is one of the listed nameservers.
✓ Contact cloud-dns-hostmaster@google.com #25

The SOA RNAME cloud-dns-hostmaster.google.com means cloud-dns-hostmaster@google.com.
✓ Counter serial #26

The serial 1 is a plain counter.

DNSSEC

warn

Signed, but no DS at parent

Found

Validated by resolver: no
Denial of existence: NSEC3
NSEC3: 1 iterations, 8-byte salt
Signatures valid until: 11 November 2026

DNSKEY in the zone

Key tag	Role	Algorithm
39429	ZSK (256)	RSASHA256 (8)
36694	KSK (257)	RSASHA256 (8)

Checks

!

Signed but not delegated securely

The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.

#27
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-11-11 #30

The earliest DNSKEY/SOA signature expires at 2026-11-11 09:16 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 1 iteration and a 8-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.

#31

Records

info

18 records at the apex

Found

Read from: 216.239.32.108:53

Type	Value	TTL
SOA	ns-cloud-c1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300	21600
NS	ns-cloud-c2.googledomains.com.	21600
NS	ns-cloud-c3.googledomains.com.	21600
NS	ns-cloud-c1.googledomains.com.	21600
NS	ns-cloud-c4.googledomains.com.	21600
A	34.117.34.78	300
MX	1 academics-de.mail.protection.outlook.com.	300
TXT	"miro-verification=00f74b9596272eaafb51a7d481892788837e487b"	300
TXT	"atlassian-domain-verification=0KXQ/HyHlWaW2LeS2kKh/QYjoZkk7smirpVo/Q1IPHetkLFv/eN7OwNE/FKNVMh7"	300
TXT	"v=spf1 include:spf.protection.outlook.com include:spf.mailjet.com -all"	300
TXT	"figma-domain-verification=fc45e849dcd2ce9cd3259cbf9b9dcbb5c4733e0695bf890f938d242eb615fd70-1768554626"	300
TXT	"anthropic-domain-verification-c05hbf=9VGnt8AkGuSAVLTYDA0Ktdi3v"	300
TXT	"adobe-idp-site-verification=23219eabc0a82ab7eca544a45515b433090e77f559461941395be62189f6d8f0"	300
TXT	"canva-site-verification=iF1ZOnQC0QHJl-ML4hlfFQ"	300
TXT	"MS=ms76518027"	300
TXT	"google-site-verification=eTO6F1AGk8vAO4tU-le4FfZDCzn2PZHJtWNw8Xzf3D0"	300
TXT	"1password-site-verification=JXGVZISOIVFINEO4SRU4YACK2M"	300
TXT	"mgverify=bd8ef880d042beb1cf938de0c52ad31393601d68468c08bb04dd1938b8ab7730"	300

Checks

✓ TTLs within range #32

TTLs: A 5m, MX 5m, NS 6h. The NS TTL at the parent is 1d and in the zone 6h; resolvers may use either.
✓ No CNAME at the apex #33

The zone apex has no CNAME record.
✓ No wildcard #34

Names that don't exist return NXDOMAIN.
i

No CAA records

Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.

#35