Domain report: hs-mainz.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

barrow.hs-mainz.de, dns-3.dfn.de, newton.hs-mainz.de, ns.hs-worms.de

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: barrow.hs-mainz.de, dns-3.dfn.de, newton.hs-mainz.de, ns.hs-worms.de
NS in the zone: barrow.hs-mainz.de, dns-3.dfn.de, newton.hs-mainz.de, ns.hs-worms.de

Nameserver	Addresses	Network (AS)	Glue
barrow.hs-mainz.de	143.93.114.99	AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE	143.93.114.99
dns-3.dfn.de	193.174.75.58 2001:638:d:b103::1	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
newton.hs-mainz.de	143.93.114.100	AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE	143.93.114.100
ns.hs-worms.de	143.93.160.9 2001:4c80:81:a000::9	AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE	143.93.160.9 2001:4c80:81:a000::9

✓ 4 nameservers #6

Delegated to barrow.hs-mainz.de, dns-3.dfn.de, newton.hs-mainz.de, ns.hs-worms.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: barrow.hs-mainz.de, newton.hs-mainz.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.
✓ 2 autonomous systems #11

The nameservers are spread over: AS2857 (RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE): 4 addresses; AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 2 addresses.
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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: barrow.hs-mainz.de, newton.hs-mainz.de.

#13

fail

5 of 6 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
barrow.hs-mainz.de 143.93.114.99	no response	no	no / no	-	-
dns-3.dfn.de 193.174.75.58	NOERROR, 8 ms, authoritative	no	yes / yes	refused	0
dns-3.dfn.de 2001:638:d:b103::1	NOERROR, 8 ms, authoritative	no	yes / yes	refused	0
newton.hs-mainz.de 143.93.114.100	NOERROR, 4 ms, authoritative	no	yes / yes	refused	[secured]
ns.hs-worms.de 143.93.160.9	NOERROR, 5 ms, authoritative	no	no / yes	refused	9.20.30
ns.hs-worms.de 2001:4c80:81:a000::9	NOERROR, 5 ms, authoritative	no	yes / yes	refused	9.20.30

✗

Nameservers not responding

These addresses did not answer, so resolvers waste time on timeouts: barrow.hs-mainz.de (143.93.114.99): read udp 46.225.38.91:54529->143.93.114.99:53: i/o timeout.

#14
✓ All authoritative #15

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

The nameservers do not answer recursive queries for other domains.
!

Software version disclosed

These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns.hs-worms.de: "9.20.30". Hide or replace the version string.

#17
✓ Zone transfers refused #18

No nameserver allows a zone transfer to the public.
✗

No DNS over TCP

DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns.hs-worms.de (143.93.160.9): read tcp 46.225.38.91:57854->143.93.160.9:53: i/o timeout.

#19
✓ EDNS supported #20

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

All nameserver addresses are publicly routable.

pass

serial 2026083101 · primary newton.hs-mainz.de

✓ Serial 2026083101 everywhere #22

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

SOA refresh 1h, retry 10m, expire 14d, negative TTL 1h.
✓ Primary is a public nameserver #24

The primary nameserver newton.hs-mainz.de is one of the listed nameservers.
✓ Contact named@hs-mainz.de #25

The SOA RNAME named.hs-mainz.de means named@hs-mainz.de.
✓ Date-based serial #26

The serial 2026083101 follows the YYYYMMDDnn convention (2026-08-31).

warn

Not signed

pass

19 records at the apex

Type	Value	TTL
SOA	newton.hs-mainz.de. named.hs-mainz.de. 2026083101 3600 600 1209600 3600	3600
NS	ns.hs-worms.de.	3600
NS	dns-3.dfn.de.	3600
NS	barrow.hs-mainz.de.	3600
NS	newton.hs-mainz.de.	3600
A	167.235.74.169	300
MX	10 mailgate-4.zdv.net.	300
MX	10 mailgate-3.zdv.net.	300
MX	10 mailgate-1.zdv.net.	300
MX	10 mailgate-2.zdv.net.	300
TXT	"adobe-idp-site-verification=93cbc61661d62229247eee3f6f454847862e86f6b392cebc8eba2cf0fe568582"	3600
TXT	"HARICA-kfFq5nN87fVpk8aOA2S"	3600
TXT	"apple-domain-verification=lJx71pzwSjH447tF"	3600
TXT	"v=spf1 a mx -all"	3600
TXT	"HARICA-bPbMdsEGlcRl3VnUTBx"	3600
TXT	"MS=D95C5AA8C3B69D334480541E6FC7A7357C5C832C"	3600
CAA	0 issue "sectigo.com"	3600
CAA	0 issue "pki.dfn.de"	3600
CAA	0 issue "harica.gr"	3600

✓ TTLs within range #32

TTLs: A 5m, MX 5m, NS 1h. The NS TTL at the parent is 1d and in the zone 1h; 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.
✓ CAA restricts issuance #35

Certificates may be issued by: sectigo.com, pki.dfn.de, harica.gr.