fc-magdeburg.de

Checked 21 October 2026, 22:20 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 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

warn

ns1.mdlink.de, ns2.mdlink.de, ns3.mdlink.de, ns4.mdlink.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.mdlink.de, ns2.mdlink.de, ns3.mdlink.de, ns4.mdlink.de
NS in the zone
ns1.mdlink.de, ns2.mdlink.de, ns3.mdlink.de, ns4.mdlink.de
NameserverAddressesNetwork (AS)Glue
ns1.mdlink.de213.211.192.35 2a03:5080:6200:1::35AS43341 MDLINK - MDlink online service center GmbH, DE AS43341 MDLINK - MDlink online service center GmbH, DE213.211.192.35 2a03:5080:6200:1::35
ns2.mdlink.de217.160.81.161 2001:8d8:fe:53:217:160:81:161AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE217.160.113.37 2001:8d8:580:401:217:160:113:37
ns3.mdlink.de185.132.35.161 2607:f1c0:fe:53:185:132:35:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB89.146.248.4 2a01:130:2000:118:89:146:248:4
ns4.mdlink.de185.132.34.161 2607:f1c0:fe:53:185:132:34:161AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB74.208.254.4 2607:f1c0:1800:8091:74:208:254:4

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.mdlink.de, ns2.mdlink.de, ns3.mdlink.de, ns4.mdlink.de.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns2.mdlink.de (glue 217.160.113.37, 2001:8d8:580:401:217:160:113:37, zone 217.160.81.161, 2001:8d8:fe:53:217:160:81:161); ns3.mdlink.de (glue 89.146.248.4, 2a01:130:2000:118:89:146:248:4, zone 185.132.35.161, 2607:f1c0:fe:53:185:132:35:161); ns4.mdlink.de (glue 74.208.254.4, 2607:f1c0:1800:8091:74:208:254:4, zone 185.132.34.161, 2607:f1c0:fe:53:185:132:34:161). Update the glue at your registrar.
    #8
  • ✓ 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 4 IPv4 /24s and 3 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 4 addresses; AS43341 (MDLINK - MDlink online service center GmbH, DE): 2 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 2 addresses.
  • i
    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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.mdlink.de 213.211.192.35NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns1.mdlink.de 2a03:5080:6200:1::35NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns2.mdlink.de 217.160.81.161NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns2.mdlink.de 2001:8d8:fe:53:217:160:81:161NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.mdlink.de 185.132.35.161NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns3.mdlink.de 2607:f1c0:fe:53:185:132:35:161NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns4.mdlink.de 185.132.34.161NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns4.mdlink.de 2607:f1c0:fe:53:185:132:34:161NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/

Checks

  • ✓ All respond #14
    All 8 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: ns2.mdlink.de: "Served by PowerDNS - https://www.powerdns.com/"; ns3.mdlink.de: "Served by PowerDNS - https://www.powerdns.com/"; ns4.mdlink.de: "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 2026101401 · primary ns1.mdlink.de

Found

Primary (MNAME)
ns1.mdlink.de
Contact (RNAME)
hostmaster.ns1.mdlink.de
Serial
2026101401
Refresh / retry
21600 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.mdlink.de (213.211.192.35)2026101401
ns1.mdlink.de (2a03:5080:6200:1::35)2026101401
ns2.mdlink.de (217.160.81.161)2026101401
ns2.mdlink.de (2001:8d8:fe:53:217:160:81:161)2026101401
ns3.mdlink.de (185.132.35.161)2026101401
ns3.mdlink.de (2607:f1c0:fe:53:185:132:35:161)2026101401
ns4.mdlink.de (185.132.34.161)2026101401
ns4.mdlink.de (2607:f1c0:fe:53:185:132:34:161)2026101401

Checks

  • ✓ Serial 2026101401 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.mdlink.de is one of the listed nameservers.
  • ✓ Contact hostmaster@ns1.mdlink.de #25
    The SOA RNAME hostmaster.ns1.mdlink.de means hostmaster@ns1.mdlink.de.
  • ✓ Date-based serial #26
    The serial 2026101401 follows the YYYYMMDDnn convention (2026-10-14).

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
213.211.192.35:53
TypeValueTTL
SOAns1.mdlink.de. hostmaster.ns1.mdlink.de. 2026101401 21600 7200 604800 8640086400
NSns1.mdlink.de.86400
NSns2.mdlink.de.86400
NSns3.mdlink.de.86400
NSns4.mdlink.de.86400
A185.243.134.22386400
MX0 fcmagdeburg-de0e.mail.protection.outlook.com.86400
TXT"MS=ms94097916"3600
TXT"v=spf1 ip4:213.211.198.179/32 include:spf.protection.outlook.com include:amazonses.com include:agenturserver.de include:spf.crsend.com a:mx4.eventim.de -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 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.
  • 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