Domain report: heise.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

pass

ns.heise.de, ns.plusline.de, ns.pop-hannover.de, ns.s.plusline.de, ns2.pop-hannover.net

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: ns.heise.de, ns.plusline.de, ns.pop-hannover.de, ns.s.plusline.de, ns2.pop-hannover.net
NS in the zone: ns.heise.de, ns.plusline.de, ns.pop-hannover.de, ns.s.plusline.de, ns2.pop-hannover.net

Nameserver	Addresses	Network (AS)	Glue
ns.heise.de	193.99.145.37 2a00:e68:14:800::d1ce	AS15743 NETDE - net.de AG, DE AS15743 NETDE - net.de AG, DE	193.99.145.37 2a00:e68:14:800::d1ce
ns.plusline.de	212.19.48.14 2a02:2e0:1:2:3:4:5:6	AS12306 PLUSLINE - Plus.line AG, DE AS12306 PLUSLINE - Plus.line AG, DE	212.19.48.14 2a02:2e0:1:2:3:4:5:6
ns.pop-hannover.de	193.98.1.200 2a00:e68::2	AS15743 NETDE - net.de AG, DE AS15743 NETDE - net.de AG, DE	193.98.1.200 2a00:e68::2
ns.s.plusline.de	212.19.40.14 2a02:2e0:a:b:c:d:e:f	AS12306 PLUSLINE - Plus.line AG, DE AS12306 PLUSLINE - Plus.line AG, DE	212.19.40.14 2a02:2e0:a:b:c:d:e:f
ns2.pop-hannover.net	62.48.67.66 2a00:e68:0:2::6	AS15743 NETDE - net.de AG, DE AS15743 NETDE - net.de AG, DE	-

Checks

✓ 5 nameservers #6

Delegated to ns.heise.de, ns.plusline.de, ns.pop-hannover.de, ns.s.plusline.de, ns2.pop-hannover.net.
✓ 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: ns.heise.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 5 IPv4 /24s and 4 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS12306 (PLUSLINE - Plus.line AG, DE): 4 addresses; AS15743 (NETDE - net.de AG, DE): 6 addresses.
✓ Nameserver names under 2 TLDs #12

Nameserver names use the TLDs .de, .net.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

info

10 of 10 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns.heise.de 193.99.145.37	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns.heise.de 2a00:e68:14:800::d1ce	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns.plusline.de 212.19.48.14	NOERROR, 4 ms, authoritative	no	yes / yes	refused	nameserver
ns.plusline.de 2a02:2e0:1:2:3:4:5:6	NOERROR, 4 ms, authoritative	no	yes / yes	refused	nameserver
ns.pop-hannover.de 193.98.1.200	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns.pop-hannover.de 2a00:e68::2	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-
ns.s.plusline.de 212.19.40.14	NOERROR, 4 ms, authoritative	no	yes / yes	refused	nameserver
ns.s.plusline.de 2a02:2e0:a:b:c:d:e:f	NOERROR, 4 ms, authoritative	no	yes / yes	refused	nameserver
ns2.pop-hannover.net 62.48.67.66	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
ns2.pop-hannover.net 2a00:e68:0:2::6	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-

Checks

✓ All respond #14

All 10 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.
i

Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: ns.plusline.de: "nameserver"; ns.s.plusline.de: "nameserver".

#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.

SOA

pass

serial 2026102106 · primary ns.heise.de

Found

Primary (MNAME): ns.heise.de
Contact (RNAME): hostmaster.heise.de
Serial: 2026102106
Refresh / retry: 14400 s / 3600 s
Expire: 604800 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
ns.heise.de (193.99.145.37)	2026102106
ns.heise.de (2a00:e68:14:800::d1ce)	2026102106
ns.plusline.de (212.19.48.14)	2026102106
ns.plusline.de (2a02:2e0:1:2:3:4:5:6)	2026102106
ns.pop-hannover.de (193.98.1.200)	2026102106
ns.pop-hannover.de (2a00:e68::2)	2026102106
ns.s.plusline.de (212.19.40.14)	2026102106
ns.s.plusline.de (2a02:2e0:a:b:c:d:e:f)	2026102106
ns2.pop-hannover.net (62.48.67.66)	2026102106
ns2.pop-hannover.net (2a00:e68:0:2::6)	2026102106

Checks

✓ Serial 2026102106 everywhere #22

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

SOA refresh 4h, retry 1h, expire 7d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver ns.heise.de is one of the listed nameservers.
✓ Contact hostmaster@heise.de #25

The SOA RNAME hostmaster.heise.de means hostmaster@heise.de.
✓ Date-based serial #26

The serial 2026102106 follows the YYYYMMDDnn convention (2026-10-21).

DNSSEC

warn

Not signed

Found

Validated by resolver: no

Checks

!

Not signed

The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

#27

Records

pass

30 records at the apex

Found

Read from: 193.99.145.37:53

Type	Value	TTL
SOA	ns.heise.de. hostmaster.heise.de. 2026102106 14400 3600 604800 86400	86400
NS	ns.pop-hannover.de.	86400
NS	ns2.pop-hannover.net.	86400
NS	ns.s.plusline.de.	86400
NS	ns.heise.de.	86400
NS	ns.plusline.de.	86400
A	193.99.144.80	86400
AAAA	2a02:2e0:3fe:1001:302::	86400
MX	40 mx04.hornetsecurity.com.	86400
MX	20 mx02.hornetsecurity.com.	86400
MX	10 mx01.hornetsecurity.com.	86400
MX	30 mx03.hornetsecurity.com.	86400
TXT	"c3ViZG9tYWlu"	86400
TXT	"google-site-verification=8kcKAZp-IbbJG7FQzRxIaUXv9Ku4qX0wgMrm_hx_L2s"	86400
TXT	"apple-domain-verification=m53iQZB4O1uMxDGR"	86400
TXT	"docusign=b14b0107-39e4-44c2-b48f-944859786474"	86400
TXT	"google-site-verification=7CvE9FRS3zv0wnl8KzLmVw0TSlQay6qOX_zGFm2wzWw"	86400
TXT	"wUIdRqARf1uNkZkPoWGdYvEmK408vvKC3HKme1h/rnswYDphj9Ytgwt6K1Df1PQnW64Oi3t9c9uKoo989wv8xw=="	86400
TXT	"kT2+bTXGMSIudHQATflucV7vjLhdq9Y18pKTKJxs0O2IebE8seBu4vCAe9MBHYehuRJWwKKt1klytxF4vyuSpA=="	86400
TXT	"atlassian-domain-verification=Gu/57UFQtzGEanzticeKxW4a9uoH0YrH87kO1sZbla9VYc2CYm4IshLxeo9vW170"	86400
TXT	"miro-verification=601d1e3e9623fe2102de9d6d215a2380ae5c69bd"	86400
TXT	"tollbit-domain-verification=6fd594c990db1742b6cb34f3699d3944885e664c32333cf8cb176da9aac3ab71"	86400
TXT	"v=spf1 ip4:193.99.144.0/24 ip4:193.99.145.0/24 ip6:2a02:2e0:3fe:1001::/64 ip6:2a00:e68:14:800::/64 ip4:193.100.232.56 ip6:2a00:e68:14:801:bad::beef include:_spfdiv.heise.de include:spf.dsb.net include:spf.hornetsecurity.com ~all"	86400
TXT	"brevo-code:e09d9e43d8e705fdcf03fb07346ec6f5"	86400
CAA	0 iodef "mailto:hostmaster@heise.de"	86400
CAA	0 issue "amazon.com"	86400
CAA	0 issue "letsencrypt.org"	86400
CAA	0 issue "sectigo.com"	86400
CAA	0 issue "digicert.com"	86400
CAA	0 issuewild "sectigo.com"	86400

Checks

✓ TTLs within range #32

TTLs: A 1d, AAAA 1d, MX 1d, NS 1d.
✓ 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: amazon.com, letsencrypt.org, sectigo.com, digicert.com.