Domain report: hs-hannover.de

Registration

info

.de country-code

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.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.
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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

info

deneb.dfn.de, dns-1.dfn.de, dns-2.dfn.de, dns1.hs-hannover.de

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: deneb.dfn.de, dns-1.dfn.de, dns-2.dfn.de, dns1.hs-hannover.de
NS in the zone: deneb.dfn.de, dns-1.dfn.de, dns-2.dfn.de, dns1.hs-hannover.de

Nameserver	Addresses	Network (AS)	Glue
deneb.dfn.de	192.76.176.9 2001:638:800:1::9	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
dns-1.dfn.de	193.174.75.50 2001:638:d:b101::1	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
dns-2.dfn.de	193.174.75.54 2001:638:d:b102::1	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
dns1.hs-hannover.de	192.108.52.10	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	192.108.52.10

✓ 4 nameservers #6

Delegated to deneb.dfn.de, dns-1.dfn.de, dns-2.dfn.de, dns1.hs-hannover.de.
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
✓ Glue present and correct #8

Glue is published for the nameservers inside the zone: dns1.hs-hannover.de.
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
✓ Nameservers in different networks #10

The nameservers are spread over 3 IPv4 /24s and 2 IPv6 /48s.
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All nameservers in one AS

All nameserver addresses are announced by one network operator (AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 7 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
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All nameserver names under .de

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
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Partly IPv6

These nameservers have no IPv6 address: dns1.hs-hannover.de.

#13

info

7 of 7 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
deneb.dfn.de 192.76.176.9	NOERROR, 14 ms, authoritative	no	yes / yes	refused	0
deneb.dfn.de 2001:638:800:1::9	NOERROR, 13 ms, authoritative	no	yes / yes	refused	0
dns-1.dfn.de 193.174.75.50	NOERROR, 13 ms, authoritative	no	yes / yes	refused	0
dns-1.dfn.de 2001:638:d:b101::1	NOERROR, 12 ms, authoritative	no	yes / yes	refused	0
dns-2.dfn.de 193.174.75.54	NOERROR, 7 ms, authoritative	no	yes / yes	refused	0
dns-2.dfn.de 2001:638:d:b102::1	NOERROR, 7 ms, authoritative	no	yes / yes	refused	0
dns1.hs-hannover.de 192.108.52.10	NOERROR, 9 ms, authoritative	no	yes / yes	refused	-

✓ All respond #14

All 7 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.
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Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: deneb.dfn.de: "0"; dns-1.dfn.de: "0"; dns-2.dfn.de: "0".

#17
✓ 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.

pass

serial 2026102100 · primary dns1.hs-hannover.de

✓ Serial 2026102100 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 1h, retry 15m, expire 14d, negative TTL 1h.
✓ Primary is a public nameserver #24

The primary nameserver dns1.hs-hannover.de is one of the listed nameservers.
✓ Contact postmaster@hs-hannover.de #25

The SOA RNAME postmaster.hs-hannover.de means postmaster@hs-hannover.de.
✓ Date-based serial #26

The serial 2026102100 follows the YYYYMMDDnn convention (2026-10-21).

warn

Not signed

info

15 records at the apex

Type	Value	TTL
SOA	dns1.hs-hannover.de. postmaster.hs-hannover.de. 2026102100 3600 900 1209600 3600	3600
NS	dns-1.dfn.de.	86400
NS	dns-2.dfn.de.	86400
NS	dns1.hs-hannover.de.	86400
NS	deneb.dfn.de.	86400
A	46.231.239.82	900
A	46.231.239.98	900
A	46.231.239.126	900
MX	0 hshannover-de0e.mail.protection.outlook.com.	3600
TXT	"anthropic-domain-verification-zwr0b9=E5fvtqZBqlq0CT2ZrwzuVm9gw"	3600
TXT	"adobe-idp-site-verification=223fe2cacdd796ba78a7bbe5cbf37ff905d753d078af2e0735dcdc1716f902fa"	3600
TXT	"v=spf1 include:spf.protection.outlook.com include:spf-intern.hs-hannover.de include:_spf.nol-is.de include:rm01.hs-hannover.de -all"	3600
TXT	"MS=ms88839796"	3600
TXT	"google-site-verification=H3Qh3Q9YAZUEnPcfYNMZeq3FZAXU3JB7bncosihm6ns"	3600
TXT	"xKHqseJvhxi+KOTNyY2CPSRe5eIwQlrrtkgcjkiRPtxpkGbOicX8V6xx9p5h1aRrRFXbnVl2oj5wyTaEwRkyuQ=="	3600