strato.de

Checked 22 October 2026, 00:31 UTC · via 8.8.8.8
!Passed with warnings
28 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-strato.ui-dns.biz, ns-strato.ui-dns.com, ns-strato.ui-dns.de, ns-strato.ui-dns.org

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns-strato.ui-dns.biz, ns-strato.ui-dns.com, ns-strato.ui-dns.de, ns-strato.ui-dns.org
NS in the zone
ns-strato.ui-dns.biz, ns-strato.ui-dns.com, ns-strato.ui-dns.de, ns-strato.ui-dns.org
NameserverAddressesNetwork (AS)Glue
ns-strato.ui-dns.biz217.160.81.220 2001:8d8:fe:53:0:d9a0:51dc:100AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
ns-strato.ui-dns.com185.132.34.220 2607:f1c0:fe:53:185:132:34:220AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns-strato.ui-dns.de217.160.80.220 2001:8d8:fe:53:0:d9a0:50dc:100AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
ns-strato.ui-dns.org185.132.35.220 2607:f1c0:fe:53:185:132:35:220AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-strato.ui-dns.biz, ns-strato.ui-dns.com, ns-strato.ui-dns.de, ns-strato.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 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 4 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 4 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

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-strato.ui-dns.biz 217.160.81.220NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-strato.ui-dns.biz 2001:8d8:fe:53:0:d9a0:51dc:100NOERROR, 14 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-strato.ui-dns.com 185.132.34.220NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-strato.ui-dns.com 2607:f1c0:fe:53:185:132:34:220NOERROR, 7 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-strato.ui-dns.de 217.160.80.220NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-strato.ui-dns.de 2001:8d8:fe:53:0:d9a0:50dc:100NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-strato.ui-dns.org 185.132.35.220NOERROR, 3 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns-strato.ui-dns.org 2607:f1c0:fe:53:185:132:35:220NOERROR, 8 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: ns-strato.ui-dns.biz: "Served by PowerDNS - https://www.powerdns.com/"; ns-strato.ui-dns.com: "Served by PowerDNS - https://www.powerdns.com/"; ns-strato.ui-dns.de: "Served by PowerDNS - https://www.powerdns.com/"; ns-strato.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

warn

serial 2026071187 · primary ns-strato.ui-dns.de

Found

Primary (MNAME)
ns-strato.ui-dns.de
Contact (RNAME)
dnsadmin.ionos.com
Serial
2026071187
Refresh / retry
3600 s / 7200 s
Expire
3542400 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns-strato.ui-dns.biz (217.160.81.220)2026071187
ns-strato.ui-dns.biz (2001:8d8:fe:53:0:d9a0:51dc:100)2026071187
ns-strato.ui-dns.com (185.132.34.220)2026071187
ns-strato.ui-dns.com (2607:f1c0:fe:53:185:132:34:220)2026071187
ns-strato.ui-dns.de (217.160.80.220)2026071187
ns-strato.ui-dns.de (2001:8d8:fe:53:0:d9a0:50dc:100)2026071187
ns-strato.ui-dns.org (185.132.35.220)2026071187
ns-strato.ui-dns.org (2607:f1c0:fe:53:185:132:35:220)2026071187

Checks

  • ✓ Serial 2026071187 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 2h should be shorter than refresh 1h. Current values: refresh 1h, retry 2h, expire 41d, negative TTL 10m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-strato.ui-dns.de 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 2026071187 follows the YYYYMMDDnn convention (2026-07-11).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
29 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
6982RSASHA256 (8)SHA256 055A56FA414F29FE…yes

DNSKEY in the zone

Key tagRoleAlgorithm
44409ZSK (256)RSASHA256 (8)
6982KSK (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 6982 (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 06:55 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

29 records at the apex

Found

Read from
217.160.81.220:53
TypeValueTTL
SOAns-strato.ui-dns.de. dnsadmin.ionos.com. 2026071187 3600 7200 3542400 6003600
NSns-strato.ui-dns.biz.3600
NSns-strato.ui-dns.de.3600
NSns-strato.ui-dns.org.3600
NSns-strato.ui-dns.com.3600
A192.67.198.333600
AAAA2a01:238:20a:202:6660:0:198:33300
MX1 smtp.google.com.300
TXT"MS=ms50420025"3600
TXT"MS=ms57092901"3600
TXT"X-NIC Certified Quality Zone"3600
TXT"4btvf4r50tzz12bg5qhndx3301tqsf6f"3600
TXT"_cuzi5qci9s7s8hn0mavqae6ehca7bmu"3600
TXT"_vgnorr6604h8o038eq50vjbgcbu21jq"3600
TXT"_xbng04g3oajsqj39peb49y1xm34i9zw"3600
TXT"bztf4l28jjz36ldxpgxpb3j16w0573x8"3600
TXT"r94c4lgtsx45rsfx1c4jgyhhg0tsgsyx "3600
TXT"apple-domain-verification=c5AYpwx37Vii11g0"3600
TXT"flexera-domain-verification-istusjrqrnokqdqz"3600
TXT"docker-verification=e4c78c46-4006-4ebe-9f45-a21943106615"3600
TXT"knowbe4-site-verification=ea92e091b44a2e728b98725e65e73528"3600
TXT"anthropic-domain-verification-ahgss2=bKjL5BoP3OH7rUfArBk7XeR6p"3600
TXT"google-site-verification=hkIYPFLCjRTsOk7E8u24c1UVQHQpNKt8fVwqA2drFPc"3600
TXT"google-site-verification=wrxqXbUddA0HM62nkrDFeqIqavU_4qUXBOc8nH42RvU"3600
TXT"browserstack-domain-verification=bd6ad633-28d3-489a-a562-403c8b6e9def"3600
TXT"_telesec-domain-validation=2025-01-21_LmfEGoTgPqgJMaCxorMDNS2AdsqoQLzecdrxyyMg2v9hxcY5a7"3600
TXT"atlassian-domain-verification=KAEkvhtoErKIDdiyb7e0wzavuISNOteHVzuoJX6M4VNN5REeLHY0BhBUYNFjFEt9"3600
TXT"figma-domain-verification=bf994688b54b476ea25cff12b37502eef47a3bad935472aa4fbafa862e2c3c14-1750658762"3600
TXT"v=spf1 a:ap4-p00-ob.smtp.rzone.de a:ap4-p02-ob.smtp.rzone.de a:ap4-p03-ob.smtp.rzone.de a:ap6-p00-ob.smtp.rzone.de a:ap6-p02-ob.smtp.rzone.de a:ap6-p03-ob.smtp.rzone.de include:_spf.google.com include:_spf-corporate.ionos.com ~all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 5m, MX 5m, 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