swr.de

Checked 22 October 2026, 00:31 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 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

ns01.brandshelter.com, ns02.brandshelter.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns01.brandshelter.com, ns02.brandshelter.net
NS in the zone
ns01.brandshelter.com, ns02.brandshelter.net
NameserverAddressesNetwork (AS)Glue
ns01.brandshelter.com193.227.117.15 2a04:2b00:14cc::15AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-
ns02.brandshelter.net194.50.187.16 2a04:2b00:14dd::16AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns01.brandshelter.com, ns02.brandshelter.net.
    #6
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1921 (RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns01.brandshelter.com 193.227.117.15NOERROR, 3 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns01.brandshelter.com 2a04:2b00:14cc::15NOERROR, 4 ms, authoritativenoyes / yesrefusedRcodeZero DNS
ns02.brandshelter.net 194.50.187.16NOERROR, 11 ms, authoritativenoyes / yesrefusedreg-wie1
ns02.brandshelter.net 2a04:2b00:14dd::16NOERROR, 11 ms, authoritativenoyes / yesrefusedreg-wie1

Checks

  • ✓ All respond #14
    All 4 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: ns01.brandshelter.com: "RcodeZero DNS"; ns02.brandshelter.net: "reg-wie1".
    #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 2026100500 · primary ns01.brandshelter.com

Found

Primary (MNAME)
ns01.brandshelter.com
Contact (RNAME)
hostmaster.swr.de
Serial
2026100500
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns01.brandshelter.com (193.227.117.15)2026100500
ns01.brandshelter.com (2a04:2b00:14cc::15)2026100500
ns02.brandshelter.net (194.50.187.16)2026100500
ns02.brandshelter.net (2a04:2b00:14dd::16)2026100500

Checks

  • ✓ Serial 2026100500 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns01.brandshelter.com is one of the listed nameservers.
  • ✓ Contact hostmaster@swr.de #25
    The SOA RNAME hostmaster.swr.de means hostmaster@swr.de.
  • ✓ Date-based serial #26
    The serial 2026100500 follows the YYYYMMDDnn convention (2026-10-05).

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

17 records at the apex

Found

Read from
193.227.117.15:53
TypeValueTTL
SOAns01.brandshelter.com. hostmaster.swr.de. 2026100500 10800 3600 604800 36003600
NSns01.brandshelter.com.3600
NSns02.brandshelter.net.3600
A34.96.100.443600
MX0 swr-de.mail.protection.outlook.com.3600
TXT"v=spf1 include:_spf.swr.de ~all"3600
TXT"apple-domain-verification=GgfFpP5li6zYrgWq"3600
TXT"flexera-domain-verification-pcskhgqmovcquxgz"3600
TXT"jamf-site-verification=CTw9wZEYLa0ucOzQpBCzOg"3600
TXT"bitrise-verification=24ea5adcfa5d37cc-IoDQuUklHlAb"3600
TXT"d365mktkey=sxyM650irRfseKaSxGamg9KcI9wx48vkezjuAtoc5gwx"3600
TXT"facebook-domain-verification=n6d0i343ktjegg2ohyp9496fjjsv6t"3600
TXT"adobe-idp-site-verification=ef5834e3-9e81-4300-b462-18f63d3d5aed"3600
TXT"google-site-verification=DcCgbIVyO-rFeBzleluzeqQj9QwiPzxp-Pk2y8_AbTI"3600
TXT"google-site-verification=DfeFfV_QDEvjXmvUZ1i5Hh2qbpHSg4PBDlG5ZQd0_SE"3600
TXT"google-site-verification=FHXvejlCadtpuVlZIJdYtdMyDxRzQjjsXnOTzFlQKOY"3600
TXT"Wgm54MhrLv3EWMoyHLWEuZYZY9lsCBz2RKxX22A0isFJoCeuOanQR9ghXhpstYCl2WsigHsh2AEgSpfQzdX+bg=="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