techbook.de

Checked 22 October 2026, 00:40 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 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

info

a1-130.akam.net, a11-67.akam.net, a14-64.akam.net, a16-65.akam.net, a6-66.akam.net, a7-67.akam.net, ns11.netuse.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
a1-130.akam.net, a11-67.akam.net, a14-64.akam.net, a16-65.akam.net, a6-66.akam.net, a7-67.akam.net, ns11.netuse.de
NS in the zone
a1-130.akam.net, a11-67.akam.net, a14-64.akam.net, a16-65.akam.net, a6-66.akam.net, a7-67.akam.net, ns11.netuse.de
NameserverAddressesNetwork (AS)Glue
a1-130.akam.net193.108.91.130 2600:1401:2::82AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-67.akam.net84.53.139.67 2600:1480:1::43AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a14-64.akam.net184.26.161.64 2600:1480:1800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a16-65.akam.net23.211.132.65 2600:1406:1b::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a6-66.akam.net23.211.133.66 2600:1401:1::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-67.akam.net23.61.199.67 2600:1406:32::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
ns11.netuse.de52.137.9.10AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-

Checks

  • ✓ 7 nameservers #6
    Delegated to a1-130.akam.net, a11-67.akam.net, a14-64.akam.net, a16-65.akam.net, a6-66.akam.net, a7-67.akam.net, ns11.netuse.de.
  • ✓ 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 7 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 1 address; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 11 addresses; AS8075 (MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns11.netuse.de.
    #13

Nameservers

warn

13 of 13 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-130.akam.net 193.108.91.130NOERROR, 4 ms, authoritativenoyes / yesrefused41824.7
a1-130.akam.net 2600:1401:2::82NOERROR, 5 ms, authoritativenoyes / yesrefused41824.6
a11-67.akam.net 84.53.139.67NOERROR, 4 ms, authoritativenoyes / yesrefused41824.7
a11-67.akam.net 2600:1480:1::43NOERROR, 3 ms, authoritativenoyes / yesrefused41824.6
a14-64.akam.net 184.26.161.64NOERROR, 5 ms, authoritativenoyes / yesrefused48878.29
a14-64.akam.net 2600:1480:1800::40NOERROR, 5 ms, authoritativenoyes / yesrefused48878.31
a16-65.akam.net 23.211.132.65NOERROR, 4 ms, authoritativenoyes / yesrefused48878.26
a16-65.akam.net 2600:1406:1b::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.32
a6-66.akam.net 23.211.133.66NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a6-66.akam.net 2600:1401:1::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.29
a7-67.akam.net 23.61.199.67NOERROR, 3 ms, authoritativenoyes / yesrefused41824.4
a7-67.akam.net 2600:1406:32::43NOERROR, 4 ms, authoritativenoyes / yesrefused41824.6
ns11.netuse.de 52.137.9.10NOERROR, 13 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 13 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: a1-130.akam.net: "41824.7"; a1-130.akam.net: "41824.6"; a11-67.akam.net: "41824.7"; a11-67.akam.net: "41824.6"; a14-64.akam.net: "48878.29"; a14-64.akam.net: "48878.31"; a16-65.akam.net: "48878.26"; a16-65.akam.net: "48878.32"; a6-66.akam.net: "48878.30"; a6-66.akam.net: "48878.29"; a7-67.akam.net: "41824.4"; a7-67.akam.net: "41824.6". 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 2026102100 · primary ns11.netuse.de

Found

Primary (MNAME)
ns11.netuse.de
Contact (RNAME)
hostmaster.netuse.de
Serial
2026102100
Refresh / retry
3600 s / 1200 s
Expire
3600000 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
a1-130.akam.net (193.108.91.130)2026102100
a1-130.akam.net (2600:1401:2::82)2026102100
a11-67.akam.net (84.53.139.67)2026102100
a11-67.akam.net (2600:1480:1::43)2026102100
a14-64.akam.net (184.26.161.64)2026102100
a14-64.akam.net (2600:1480:1800::40)2026102100
a16-65.akam.net (23.211.132.65)2026102100
a16-65.akam.net (2600:1406:1b::41)2026102100
a6-66.akam.net (23.211.133.66)2026102100
a6-66.akam.net (2600:1401:1::42)2026102100
a7-67.akam.net (23.61.199.67)2026102100
a7-67.akam.net (2600:1406:32::43)2026102100
ns11.netuse.de (52.137.9.10)2026102100

Checks

  • ✓ Serial 2026102100 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 20m, expire 1000h, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns11.netuse.de is one of the listed nameservers.
  • ✓ Contact hostmaster@netuse.de #25
    The SOA RNAME hostmaster.netuse.de means hostmaster@netuse.de.
  • ✓ Date-based serial #26
    The serial 2026102100 follows the YYYYMMDDnn convention (2026-10-21).

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

15 records at the apex

Found

Read from
193.108.91.130:53
TypeValueTTL
SOAns11.netuse.de. hostmaster.netuse.de. 2026102100 3600 1200 3600000 6003600
NSns11.netuse.de.3600
NSa16-65.akam.net.3600
NSa1-130.akam.net.3600
NSa11-67.akam.net.3600
NSa14-64.akam.net.3600
NSa6-66.akam.net.3600
NSa7-67.akam.net.3600
A76.223.57.2151800
A13.248.163.2101800
MX0 techbook-de.mail.protection.outlook.com.86400
TXT"google-site-verification=R9YUcmsvQkH0tHaSpkAv-wJiPWIcqkLjgMCxOfao3Bg"300
TXT"v=spf1 include:spf.asv.de include:spf.protection.outlook.com ?all"300
TXT"MS=ms46931471"300
TXT"tollbit-domain-verification=eb18e4eac4ab78f38a606d3f669f2a5e6c0ec4a96c1e1438e1a12bbe15b33b47"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 30m, MX 1d, 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