roller.de

Checked 22 October 2026, 00:00 UTC · via 8.8.8.8
!Passed with warnings
20 passed 1 warning 0 failed 8 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

balu.sector27.de, pns.dtag.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
balu.sector27.de, pns.dtag.de
NS in the zone
balu.sector27.de, pns.dtag.de
NameserverAddressesNetwork (AS)Glue
balu.sector27.de194.25.239.2AS3320 DTAG - Deutsche Telekom AG, DE194.25.239.2
pns.dtag.de194.25.0.125 2003:40:8000::100AS3320 DTAG - Deutsche Telekom AG, DE AS3320 DTAG - Deutsche Telekom AG, DE194.25.0.125 2003:40:8000::100

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: balu.sector27.de, pns.dtag.de.
    #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 1 IPv6 /48.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS3320 (DTAG - Deutsche Telekom AG, DE): 3 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • 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: balu.sector27.de.
    #13

Nameservers

info

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
balu.sector27.de 194.25.239.2NOERROR, 11 ms, authoritativenoyes / yesrefused-
pns.dtag.de 194.25.0.125NOERROR, 9 ms, authoritativenoyes / yesrefusedDomainNameServer
pns.dtag.de 2003:40:8000::100NOERROR, 10 ms, authoritativenoyes / yesrefusedDomainNameServer

Checks

  • ✓ All respond #14
    All 3 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: pns.dtag.de: "DomainNameServer".
    #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 2026091843 · primary balu.sector27.de

Found

Primary (MNAME)
balu.sector27.de
Contact (RNAME)
hkiy.sector27.de
Serial
2026091843
Refresh / retry
7200 s / 3600 s
Expire
1209600 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
balu.sector27.de (194.25.239.2)2026091843
pns.dtag.de (194.25.0.125)2026091843
pns.dtag.de (2003:40:8000::100)2026091843

Checks

  • ✓ Serial 2026091843 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 1h, expire 14d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver balu.sector27.de is one of the listed nameservers.
  • ✓ Contact hkiy@sector27.de #25
    The SOA RNAME hkiy.sector27.de means hkiy@sector27.de.
  • ✓ Date-based serial #26
    The serial 2026091843 follows the YYYYMMDDnn convention (2026-09-18).

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

11 records at the apex

Found

Read from
194.25.239.2:53
TypeValueTTL
SOAbalu.sector27.de. hkiy.sector27.de. 2026091843 7200 3600 1209600 600600
NSpns.dtag.de.600
NSbalu.sector27.de.600
A34.117.96.45300
MX10 roller-de-1.fortimailcloud.com.3600
MX20 roller-de-2.fortimailcloud.com.3600
TXT"v=spf1 mx a:mail.portal.iwofurn.com ip4:34.78.178.91 ip4:46.235.17.248/29 ip4:213.203.219.181 ip4:213.203.208.210 ip4:213.203.208.218 ip4:195.145.23.169 ip4:195.145.23.179 a:db.roller.de ip4:88.198.252.229" " include:mail.zendesk.com ip4:195.145.23.178 include:spf.topdesk.net include:_spf.profils.org include:zimbra.dh-software.de include:spf.protection.outlook.com include:_spf.fortimailcloud.com -all"3600
TXT"cNY499QBfFQ+DyG+W9skr0qFUSSaArF8zHEjiwjUBn46CSv6lDhfTCQaVwgRU52GC80hED2RvoW0coUmkAwj9w=="3600
TXT"MS=ms61379289"3600
TXT"apple-domain-verification=QSjTVy8eepYgdfzm"3600
TXT"google-site-verification=KhZ7_VhxtF2z74lkG8NSrMzU_EOqJptzz5EbJ8d69SA"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1h, NS 10m. The NS TTL at the parent is 1d and in the zone 10m; 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