Domain report: gmx.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-gmx.ui-dns.biz, ns-gmx.ui-dns.com, ns-gmx.ui-dns.de, ns-gmx.ui-dns.org

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: ns-gmx.ui-dns.biz, ns-gmx.ui-dns.com, ns-gmx.ui-dns.de, ns-gmx.ui-dns.org
NS in the zone: ns-gmx.ui-dns.biz, ns-gmx.ui-dns.com, ns-gmx.ui-dns.de, ns-gmx.ui-dns.org

Nameserver	Addresses	Network (AS)	Glue
ns-gmx.ui-dns.biz	217.160.81.199 185.132.33.199 2607:f1c0:fe:53:185:132:33:199 2001:8d8:fe:53:0:d9a0:51c7:100	AS8560 IONOS-AS - IONOS SE, DE AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS8560 IONOS-AS - IONOS SE, DE	-
ns-gmx.ui-dns.com	185.132.34.199 217.160.82.199 2607:f1c0:fe:53:185:132:34:199 2001:8d8:fe:53:0:d9a0:52c7:100	AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS8560 IONOS-AS - IONOS SE, DE AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS8560 IONOS-AS - IONOS SE, DE	-
ns-gmx.ui-dns.de	217.160.80.199 185.132.32.199 2001:8d8:fe:53:0:d9a0:50c7:100 2607:f1c0:fe:53:185:132:32:199	AS8560 IONOS-AS - IONOS SE, DE AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS8560 IONOS-AS - IONOS SE, DE AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB	-
ns-gmx.ui-dns.org	217.160.83.199 185.132.35.199 2001:8d8:fe:53:0:d9a0:53c7:100 2607:f1c0:fe:53:185:132:35:199	AS8560 IONOS-AS - IONOS SE, DE AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS8560 IONOS-AS - IONOS SE, DE AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB	-

Checks

✓ 4 nameservers #6

Delegated to ns-gmx.ui-dns.biz, ns-gmx.ui-dns.com, ns-gmx.ui-dns.de, ns-gmx.ui-dns.org.
✓ 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.
✓ Nameservers in different networks #10

The nameservers are spread over 8 IPv4 /24s and 2 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 8 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 8 addresses.
✓ Nameserver names under 4 TLDs #12

Nameserver names use the TLDs .biz, .com, .de, .org.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

info

16 of 16 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns-gmx.ui-dns.biz 217.160.81.199	NOERROR, 9 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.biz 185.132.33.199	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.biz 2607:f1c0:fe:53:185:132:33:199	NOERROR, 6 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.biz 2001:8d8:fe:53:0:d9a0:51c7:100	NOERROR, 12 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.com 185.132.34.199	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.com 217.160.82.199	NOERROR, 9 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.com 2607:f1c0:fe:53:185:132:34:199	NOERROR, 6 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.com 2001:8d8:fe:53:0:d9a0:52c7:100	NOERROR, 12 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.de 217.160.80.199	NOERROR, 9 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.de 185.132.32.199	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.de 2001:8d8:fe:53:0:d9a0:50c7:100	NOERROR, 12 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.de 2607:f1c0:fe:53:185:132:32:199	NOERROR, 6 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.org 217.160.83.199	NOERROR, 9 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.org 185.132.35.199	NOERROR, 3 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.org 2001:8d8:fe:53:0:d9a0:53c7:100	NOERROR, 12 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns-gmx.ui-dns.org 2607:f1c0:fe:53:185:132:35:199	NOERROR, 6 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/

Checks

✓ All respond #14

All 16 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-gmx.ui-dns.biz: "Served by PowerDNS - https://www.powerdns.com/"; ns-gmx.ui-dns.com: "Served by PowerDNS - https://www.powerdns.com/"; ns-gmx.ui-dns.de: "Served by PowerDNS - https://www.powerdns.com/"; ns-gmx.ui-dns.org: "Served by PowerDNS - https://www.powerdns.com/".

#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 2013084663 · primary ns-gmx.ui-dns.org

Found

Primary (MNAME): ns-gmx.ui-dns.org
Contact (RNAME): dnsadmin.1und1.de
Serial: 2013084663
Refresh / retry: 28800 s / 7200 s
Expire: 604800 s
Negative TTL: 600 s

Serial per nameserver

Nameserver	Serial
ns-gmx.ui-dns.biz (217.160.81.199)	2013084663
ns-gmx.ui-dns.biz (185.132.33.199)	2013084663
ns-gmx.ui-dns.biz (2607:f1c0:fe:53:185:132:33:199)	2013084663
ns-gmx.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51c7:100)	2013084663
ns-gmx.ui-dns.com (185.132.34.199)	2013084663
ns-gmx.ui-dns.com (217.160.82.199)	2013084663
ns-gmx.ui-dns.com (2607:f1c0:fe:53:185:132:34:199)	2013084663
ns-gmx.ui-dns.com (2001:8d8:fe:53:0:d9a0:52c7:100)	2013084663
ns-gmx.ui-dns.de (217.160.80.199)	2013084663
ns-gmx.ui-dns.de (185.132.32.199)	2013084663
ns-gmx.ui-dns.de (2001:8d8:fe:53:0:d9a0:50c7:100)	2013084663
ns-gmx.ui-dns.de (2607:f1c0:fe:53:185:132:32:199)	2013084663
ns-gmx.ui-dns.org (217.160.83.199)	2013084663
ns-gmx.ui-dns.org (185.132.35.199)	2013084663
ns-gmx.ui-dns.org (2001:8d8:fe:53:0:d9a0:53c7:100)	2013084663
ns-gmx.ui-dns.org (2607:f1c0:fe:53:185:132:35:199)	2013084663

Checks

✓ Serial 2013084663 everywhere #22

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

SOA refresh 8h, retry 2h, expire 7d, negative TTL 10m.
✓ Primary is a public nameserver #24

The primary nameserver ns-gmx.ui-dns.org is one of the listed nameservers.
✓ Contact dnsadmin@1und1.de #25

The SOA RNAME dnsadmin.1und1.de means dnsadmin@1und1.de.
✓ Timestamp serial #26

The serial 2013084663 is a Unix timestamp (2033-10-16 14:11 UTC).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 24 iterations, 8-byte salt
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
26497	RSASHA256 (8)	SHA256 E7A00568AC320816…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
43065	ZSK (256)	RSASHA256 (8)
26497	KSK (257)	RSASHA256 (8)

Checks

✓ Signed and validated #27

The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
✓ DS matches a key #28

The DS record at the parent matches a key in the zone: key tag 26497 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-10-29 #30

The earliest DNSKEY/SOA signature expires at 2026-10-29 06:53 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 24 iterations 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

pass

24 records at the apex

Found

Read from: 217.160.81.199:53

Type	Value	TTL
SOA	ns-gmx.ui-dns.org. dnsadmin.1und1.de. 2013084663 28800 7200 604800 600	86400
NS	ns-gmx.ui-dns.org.	86400
NS	ns-gmx.ui-dns.biz.	86400
NS	ns-gmx.ui-dns.de.	86400
NS	ns-gmx.ui-dns.com.	86400
A	217.72.199.108	300
A	217.72.199.107	300
MX	10 mx01.emig.gmx.net.	900
MX	10 mx00.emig.gmx.net.	900
TXT	"google-site-verification=8jV5RCya962H1ur14xR3xWCFUBsExt_YibC3HkuJ9X8"	300
TXT	"_vf2mst30i595nhxgwsxlgw479ijaaby"	86400
TXT	"v=spf1 redirect=_spf.gmx.net"	3600
TXT	"kqpx82j1ql9zhqh54gdr8pj9f1ytvht1"	86400
TXT	"Trustpilot-Verification-kqvVskCm6JQ9Vg1qAmahpBSJ5tvZORbriFyVIk4E"	300
TXT	"179gjz475x3lvxbtsv2mn24vc1l1q9tb"	86400
TXT	"nq42wrnqffyy7fypgqp6z79rkhrxkmqv"	86400
TXT	"9mskmp7hmzfbdhgdd0wlqyjhdkrm0r8f"	86400
TXT	"google-site-verification=msmRa0huIPbhSmk5g86YT8k-4ZATMrbyFiqx4c7V7Y8"	86400
CAA	0 issuewild "digicert.com"	86400
CAA	0 issue "sectigo.com"	86400
CAA	0 issuewild "telesec.de"	86400
CAA	0 issuewild "sectigo.com"	86400
CAA	0 issue "telesec.de"	86400
CAA	0 issue "Digicert.com"	86400

Checks

✓ TTLs within range #32

TTLs: A 5m, MX 15m, 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: digicert.com, sectigo.com, telesec.de, Digicert.com.