oreilly.de

Checked 21 October 2026, 23:42 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 warnings 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

warn

ns1.nanocomp.com, ns2.nanocomp.com, ns3.nanocomp.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.nanocomp.com, ns2.nanocomp.com, ns3.nanocomp.com
NS in the zone
ns1.nanocomp.com, ns2.nanocomp.com, ns3.nanocomp.com
NameserverAddressesNetwork (AS)Glue
ns1.nanocomp.com62.206.70.180AS20676 PLUSNET - Plusnet GmbH, DE-
ns2.nanocomp.com213.168.78.200AS8422 NETCOLOGNE - NetCologne Gesellschaft fur Telekommunikation mbH, DE-
ns3.nanocomp.com193.109.214.1AS20676 PLUSNET - Plusnet GmbH, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.nanocomp.com, ns2.nanocomp.com, ns3.nanocomp.com.
  • ✓ 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 3 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20676 (PLUSNET - Plusnet GmbH, DE): 2 addresses; AS8422 (NETCOLOGNE - NetCologne Gesellschaft fur Telekommunikation mbH, DE): 1 address.
  • i
    All nameserver names under .com
    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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.nanocomp.com 62.206.70.180NOERROR, 11 ms, authoritativenoyes / yesrefused9.11.2
ns2.nanocomp.com 213.168.78.200NOERROR, 9 ms, authoritativenoyes / yesrefused9.18.28
ns3.nanocomp.com 193.109.214.1NOERROR, 12 ms, authoritativenoyes / yesrefused9.11.2

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.nanocomp.com: "9.11.2"; ns2.nanocomp.com: "9.18.28"; ns3.nanocomp.com: "9.11.2". Hide or replace the version string.
    #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 2026052101 · primary ns3.nanocomp.com

Found

Primary (MNAME)
ns3.nanocomp.com
Contact (RNAME)
grosse.nanocomp.com
Serial
2026052101
Refresh / retry
14400 s / 3600 s
Expire
604800 s
Negative TTL
43200 s

Serial per nameserver

NameserverSerial
ns1.nanocomp.com (62.206.70.180)2026052101
ns2.nanocomp.com (213.168.78.200)2026052101
ns3.nanocomp.com (193.109.214.1)2026052101

Checks

  • ✓ Serial 2026052101 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 7d, negative TTL 12h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns3.nanocomp.com is one of the listed nameservers.
  • ✓ Contact grosse@nanocomp.com #25
    The SOA RNAME grosse.nanocomp.com means grosse@nanocomp.com.
  • ✓ Date-based serial #26
    The serial 2026052101 follows the YYYYMMDDnn convention (2026-05-21).

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

10 records at the apex

Found

Read from
62.206.70.180:53
TypeValueTTL
SOAns3.nanocomp.com. grosse.nanocomp.com. 2026052101 14400 3600 604800 43200172800
NSns1.nanocomp.com.300
NSns3.nanocomp.com.300
NSns2.nanocomp.com.300
A109.71.73.205300
MX10 mx1.heinlein-support.de.300
MX10 mx2.heinlein-support.de.300
MX20 mx3.heinlein-support.de.300
TXT"v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDGcsjRu7V9NzeNaZHPqmJ5UajPa2Mw1JE+ryZiaU0LG1RKoWNrUtrITc3BBDUMALYp2LgOFzvRzVRdurzoCGEIc0Z3VGyDVtfRogYYrywT4AkwG7VSGFZP2q47qW+hFkuY6jxMYEjly+lgNknO8u02ArQUKw37FsvzthHj5DGwUQIDAQAB;"300
TXT"v=spf1 mx a include:spf.nl2go.com ip4:188.40.159.224/28 ip4:88.198.30.128/29 ip4:188.40.133.15 ip4:188.40.73.88 ip4:194.8.219.19/29 -all"300

Checks

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