halberstadt.de

Checked 21 October 2026, 22:41 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 0 failed 6 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

info

nsb0.schlundtech.de, nsc0.schlundtech.de, nsd0.schlundtech.de, srv002.halberstadt.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
nsb0.schlundtech.de, nsc0.schlundtech.de, nsd0.schlundtech.de, srv002.halberstadt.de
NS in the zone
nsb0.schlundtech.de, nsc0.schlundtech.de, nsd0.schlundtech.de, srv002.halberstadt.de
NameserverAddressesNetwork (AS)Glue
nsb0.schlundtech.de185.132.35.227 2607:f1c0:fe:53:185:132:35:227AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
nsc0.schlundtech.de217.160.80.227 2001:8d8:fe:53:217:160:80:227AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
nsd0.schlundtech.de217.160.81.227 2001:8d8:fe:53:217:160:81:227AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
srv002.halberstadt.de81.88.25.89AS8648 ONE-NETWORK - dogado GmbH, DE81.88.25.89

Checks

  • ✓ 4 nameservers #6
    Delegated to nsb0.schlundtech.de, nsc0.schlundtech.de, nsd0.schlundtech.de, srv002.halberstadt.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: srv002.halberstadt.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 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 2 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 4 addresses; AS8648 (ONE-NETWORK - dogado GmbH, DE): 1 address.
  • 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: srv002.halberstadt.de.
    #13

Nameservers

info

7 of 7 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
nsb0.schlundtech.de 185.132.35.227NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsb0.schlundtech.de 2607:f1c0:fe:53:185:132:35:227NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsc0.schlundtech.de 217.160.80.227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsc0.schlundtech.de 2001:8d8:fe:53:217:160:80:227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsd0.schlundtech.de 217.160.81.227NOERROR, 10 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
nsd0.schlundtech.de 2001:8d8:fe:53:217:160:81:227NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
srv002.halberstadt.de 81.88.25.89NOERROR, 17 ms, authoritativenoyes / yesrefusednone

Checks

  • ✓ All respond #14
    All 7 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: nsb0.schlundtech.de: "Served by PowerDNS - https://www.powerdns.com/"; nsc0.schlundtech.de: "Served by PowerDNS - https://www.powerdns.com/"; nsd0.schlundtech.de: "Served by PowerDNS - https://www.powerdns.com/"; srv002.halberstadt.de: "none".
    #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

warn

serial 2026092501 · primary srv002.halberstadt.de

Found

Primary (MNAME)
srv002.halberstadt.de
Contact (RNAME)
it-service.halberstadt.de
Serial
2026092501
Refresh / retry
180 s / 60 s
Expire
25200 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
nsb0.schlundtech.de (185.132.35.227)2026092501
nsb0.schlundtech.de (2607:f1c0:fe:53:185:132:35:227)2026092501
nsc0.schlundtech.de (217.160.80.227)2026092501
nsc0.schlundtech.de (2001:8d8:fe:53:217:160:80:227)2026092501
nsd0.schlundtech.de (217.160.81.227)2026092501
nsd0.schlundtech.de (2001:8d8:fe:53:217:160:81:227)2026092501
srv002.halberstadt.de (81.88.25.89)2026092501

Checks

  • ✓ Serial 2026092501 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 3m is outside 20m–1d; expire 7h is shorter than 7d; secondaries stop answering too soon when the primary is down; negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 3m, retry 1m, expire 7h, negative TTL 3m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver srv002.halberstadt.de is one of the listed nameservers.
  • ✓ Contact it-service@halberstadt.de #25
    The SOA RNAME it-service.halberstadt.de means it-service@halberstadt.de.
  • ✓ Date-based serial #26
    The serial 2026092501 follows the YYYYMMDDnn convention (2026-09-25).

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

16 records at the apex

Found

Read from
185.132.35.227:53
TypeValueTTL
SOAsrv002.halberstadt.de. it-service.halberstadt.de. 2026092501 180 60 25200 1803600
NSnsb0.schlundtech.de.3600
NSsrv002.halberstadt.de.3600
NSnsd0.schlundtech.de.3600
NSnsc0.schlundtech.de.3600
A138.199.155.2433600
MX10 mailgate.halberstadt.de.3600
TXT"apple-domain-verification=UepTj7Jifmk8Rmc7"3600
TXT"2017112807002216iaevkm7ov62todysm02360353aeezu541slryxhh8soyazkn"3600
TXT"google-site-verification=TS1cR83yD43mR-ltblIbGDvM9roKNxO8m2oz-JqbMus"3600
TXT"4wvydpfrv5b7ozns0u1ndcfdkjryh4"3600
TXT"google-site-verification=Xsewp0GZdhljqwl4tW1If55gpi3lZKgGzBGoXI5lxjI"3600
TXT"sophos-domain-verification=8c799e2d683b194750c6fe18a1bb81fa1f6a0a84"3600
TXT"apple-domain-verification=azHAcodoe79Xbnap"3600
TXT"v=spf1 +a +ip4:81.88.25.89 +ip4:193.242.112.150 +ip4:193.242.112.155 +ip4:80.151.89.191 +ip4:85.214.80.231 +ip4:159.69.147.2 +ip4:78.47.67.96 +ip4:49.12.113.220 +ip4:62.55.182.68 +mx -all"3600
TXT"facebook-domain-verification=4wvydpfrv5b7ozns0u1ndcfdkjryh4"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, 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.
  • 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