deref-web.de

Checked 21 October 2026, 22:13 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 0 failed 4 info

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-mam.ui-dns.biz, ns-mam.ui-dns.com, ns-mam.ui-dns.de, ns-mam.ui-dns.org

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns-mam.ui-dns.biz, ns-mam.ui-dns.com, ns-mam.ui-dns.de, ns-mam.ui-dns.org
NS in the zone
ns-mam.ui-dns.biz, ns-mam.ui-dns.com, ns-mam.ui-dns.de, ns-mam.ui-dns.org
NameserverAddressesNetwork (AS)Glue
ns-mam.ui-dns.biz217.160.81.214 185.132.33.214 2001:8d8:fe:53:0:d9a0:51d6:100 2607:f1c0:fe:53:185:132:33:214AS8560 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-mam.ui-dns.com217.160.82.214 185.132.34.214 2001:8d8:fe:53:0:d9a0:52d6:100 2607:f1c0:fe:53:185:132:34:214AS8560 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-mam.ui-dns.de185.132.32.214 217.160.80.214 2001:8d8:fe:53:0:d9a0:50d6:100 2607:f1c0:fe:53:185:132:32:214AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns-mam.ui-dns.org185.132.35.214 217.160.83.214 2001:8d8:fe:53:0:d9a0:53d6:100 2607:f1c0:fe:53:185:132:35:214AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-mam.ui-dns.biz, ns-mam.ui-dns.com, ns-mam.ui-dns.de, ns-mam.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

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-mam.ui-dns.biz 217.160.81.214NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.biz 185.132.33.214NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.biz 2001:8d8:fe:53:0:d9a0:51d6:100NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.biz 2607:f1c0:fe:53:185:132:33:214NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.com 217.160.82.214NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.com 185.132.34.214NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.com 2001:8d8:fe:53:0:d9a0:52d6:100NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.com 2607:f1c0:fe:53:185:132:34:214NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.de 185.132.32.214NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.de 217.160.80.214NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.de 2001:8d8:fe:53:0:d9a0:50d6:100NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.de 2607:f1c0:fe:53:185:132:32:214NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.org 185.132.35.214NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.org 217.160.83.214NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.org 2001:8d8:fe:53:0:d9a0:53d6:100NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-mam.ui-dns.org 2607:f1c0:fe:53:185:132:35:214NOERROR, 3 ms, authoritativenoyes / yesrefusedServed 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-mam.ui-dns.biz: "Served by PowerDNS - https://www.powerdns.com/"; ns-mam.ui-dns.com: "Served by PowerDNS - https://www.powerdns.com/"; ns-mam.ui-dns.de: "Served by PowerDNS - https://www.powerdns.com/"; ns-mam.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 2016021742 · primary ns-mam.ui-dns.com

Found

Primary (MNAME)
ns-mam.ui-dns.com
Contact (RNAME)
dnsadmin.ionos.com
Serial
2016021742
Refresh / retry
14400 s / 3600 s
Expire
605000 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns-mam.ui-dns.biz (217.160.81.214)2016021742
ns-mam.ui-dns.biz (185.132.33.214)2016021742
ns-mam.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51d6:100)2016021742
ns-mam.ui-dns.biz (2607:f1c0:fe:53:185:132:33:214)2016021742
ns-mam.ui-dns.com (217.160.82.214)2016021742
ns-mam.ui-dns.com (185.132.34.214)2016021742
ns-mam.ui-dns.com (2001:8d8:fe:53:0:d9a0:52d6:100)2016021742
ns-mam.ui-dns.com (2607:f1c0:fe:53:185:132:34:214)2016021742
ns-mam.ui-dns.de (185.132.32.214)2016021742
ns-mam.ui-dns.de (217.160.80.214)2016021742
ns-mam.ui-dns.de (2001:8d8:fe:53:0:d9a0:50d6:100)2016021742
ns-mam.ui-dns.de (2607:f1c0:fe:53:185:132:32:214)2016021742
ns-mam.ui-dns.org (185.132.35.214)2016021742
ns-mam.ui-dns.org (217.160.83.214)2016021742
ns-mam.ui-dns.org (2001:8d8:fe:53:0:d9a0:53d6:100)2016021742
ns-mam.ui-dns.org (2607:f1c0:fe:53:185:132:35:214)2016021742

Checks

  • ✓ Serial 2016021742 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 168h3m20s, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-mam.ui-dns.com is one of the listed nameservers.
  • ✓ Contact dnsadmin@ionos.com #25
    The SOA RNAME dnsadmin.ionos.com means dnsadmin@ionos.com.
  • ✓ Date-based serial #26
    The serial 2016021742 follows the YYYYMMDDnn convention (2016-02-17).

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

info

9 records at the apex

Found

Read from
217.160.81.214:53
TypeValueTTL
SOAns-mam.ui-dns.com. dnsadmin.ionos.com. 2016021742 14400 3600 605000 60086400
NSns-mam.ui-dns.biz.172800
NSns-mam.ui-dns.com.172800
NSns-mam.ui-dns.de.172800
NSns-mam.ui-dns.org.172800
A217.72.196.59300
MX10 mxint02.1and1.com.86400
MX10 mxint01.1and1.com.86400
TXT"google-site-verification=kz5OMw8pNxY7rtN_JDU9ktSdd3IeoWYkMse5z-4yhsg"86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1d, NS 2d. The NS TTL at the parent is 1d and in the zone 2d; 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