netto-online.de

Checked 21 October 2026, 23:31 UTC · via 8.8.8.8
!Passed with warnings
27 passed 1 warning 0 failed 5 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

a1-241.akam.net, a11-65.akam.net, a12-66.akam.net, a14-66.akam.net, a28-64.akam.net, a7-65.akam.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
a1-241.akam.net, a11-65.akam.net, a12-66.akam.net, a14-66.akam.net, a28-64.akam.net, a7-65.akam.net
NS in the zone
a1-241.akam.net, a11-65.akam.net, a12-66.akam.net, a14-66.akam.net, a28-64.akam.net, a7-65.akam.net
NameserverAddressesNetwork (AS)Glue
a1-241.akam.net193.108.91.241 2600:1401:2::f1AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-65.akam.net84.53.139.65 2600:1480:1::41AS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a12-66.akam.net184.26.160.66 2600:1480:f000::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a14-66.akam.net184.26.161.66 2600:1480:1800::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a28-64.akam.net95.100.173.64 2600:1480:d800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-65.akam.net23.61.199.65 2600:1406:32::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-241.akam.net, a11-65.akam.net, a12-66.akam.net, a14-66.akam.net, a28-64.akam.net, a7-65.akam.net.
  • ✓ 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 6 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 2 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.
  • i
    All nameserver names under .net
    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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-241.akam.net 193.108.91.241NOERROR, 3 ms, authoritativenoyes / yesrefused41824.10
a1-241.akam.net 2600:1401:2::f1NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a11-65.akam.net 84.53.139.65NOERROR, 4 ms, authoritativenoyes / yesrefused41824.4
a11-65.akam.net 2600:1480:1::41NOERROR, 5 ms, authoritativenoyes / yesrefused41824.7
a12-66.akam.net 184.26.160.66NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a12-66.akam.net 2600:1480:f000::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a14-66.akam.net 184.26.161.66NOERROR, 4 ms, authoritativenoyes / yesrefused48878.32
a14-66.akam.net 2600:1480:1800::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.29
a28-64.akam.net 95.100.173.64NOERROR, 4 ms, authoritativenoyes / yesrefused48878.30
a28-64.akam.net 2600:1480:d800::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a7-65.akam.net 23.61.199.65NOERROR, 3 ms, authoritativenoyes / yesrefused41824.11
a7-65.akam.net 2600:1406:32::41NOERROR, 5 ms, authoritativenoyes / yesrefused41824.10

Checks

  • ✓ All respond #14
    All 12 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: a1-241.akam.net: "41824.10"; a1-241.akam.net: "41824.11"; a11-65.akam.net: "41824.4"; a11-65.akam.net: "41824.7"; a12-66.akam.net: "48878.27"; a12-66.akam.net: "48878.31"; a14-66.akam.net: "48878.32"; a14-66.akam.net: "48878.29"; a28-64.akam.net: "48878.30"; a28-64.akam.net: "48878.33"; a7-65.akam.net: "41824.11"; a7-65.akam.net: "41824.10". 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

info

serial 2025010761 · primary whatever.netto-online.de

Found

Primary (MNAME)
whatever.netto-online.de
Contact (RNAME)
hostmaster.netto-online.de
Serial
2025010761
Refresh / retry
10800 s / 3600 s
Expire
2419200 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
a1-241.akam.net (193.108.91.241)2025010761
a1-241.akam.net (2600:1401:2::f1)2025010761
a11-65.akam.net (84.53.139.65)2025010761
a11-65.akam.net (2600:1480:1::41)2025010761
a12-66.akam.net (184.26.160.66)2025010761
a12-66.akam.net (2600:1480:f000::42)2025010761
a14-66.akam.net (184.26.161.66)2025010761
a14-66.akam.net (2600:1480:1800::42)2025010761
a28-64.akam.net (95.100.173.64)2025010761
a28-64.akam.net (2600:1480:d800::40)2025010761
a7-65.akam.net (23.61.199.65)2025010761
a7-65.akam.net (2600:1406:32::41)2025010761

Checks

  • ✓ Serial 2025010761 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 28d, negative TTL 1d.
  • i
    Hidden master (not resolvable)
    The primary nameserver whatever.netto-online.de is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.
    #24
  • ✓ Contact hostmaster@netto-online.de #25
    The SOA RNAME hostmaster.netto-online.de means hostmaster@netto-online.de.
  • ✓ Date-based serial #26
    The serial 2025010761 follows the YYYYMMDDnn convention (2025-01-07).

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
24 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
6923ECDSAP256SHA256 (13)SHA256 7DDCE612C0F69F34…yes

DNSKEY in the zone

Key tagRoleAlgorithm
50165ZSK (256)ECDSAP256SHA256 (13)
6923KSK (257)ECDSAP256SHA256 (13)
13621ZSK (256)ECDSAP256SHA256 (13)
18342KSK (257)ECDSAP256SHA256 (13)

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 6923 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 73h0m0s and created on demand; the current one was made at 2026-10-21 10:04 UTC and expires at 2026-10-24 11:04 UTC.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

26 records at the apex

Found

Read from
193.108.91.241:53
TypeValueTTL
SOAwhatever.netto-online.de. hostmaster.netto-online.de. 2025010761 10800 3600 2419200 8640086400
NSa14-66.akam.net.86400
NSa1-241.akam.net.86400
NSa12-66.akam.net.86400
NSa28-64.akam.net.86400
NSa11-65.akam.net.86400
NSa7-65.akam.net.86400
A20.79.75.118600
MX20 waldorf.netto-online.de.600
MX20 statler.netto-online.de.600
TXT"wh9lm6q813p0s8nj18q4357k23l79ltv"600
TXT"openai-domain-verification=dv-gBMWGAi98Dh7IBKMuQgRwzM1"600
TXT"_359oa9pn1yr725xk6yopc4yfoae9qet"600
TXT"RL51qa17wcHpjuAXyjwqX7qAV84e0BMDVitgqf+sH0yH5t2gFfwVAEG3KnpHAZJ/SxWF64nqwEIZ0F5y2oDk3Q=="600
TXT"MS=F6E560ABA0B7D930BB42C13DDD07D0B818F1C922"600
TXT"facebook-domain-verification=llol2ja9zupa9owfbf7sohtiwduhw2"600
TXT"v=spf1 ip4:195.250.57.71 ip4:195.250.57.72 ip4:195.250.57.3 ip4:80.237.192.59 ip4:46.22.39.100 ip4:62.138.214.50 ip4:62.153.222.70 a mx include:spf.mandrillapp.com include:spf.protection.outlook.com ~all"600
TXT"jetbrains-domain-verification=erway2wxb6eeqe04qkv6o7jsa"600
TXT"apple-domain-verification=Sc2Fm8KJ2vPdaLbS"600
TXT"google-site-verification=ZuBRGlbjsbXWCE_eAwnvbFgamtvj9KuMmw7U5U94HIY"600
TXT"figma-domain-verification=58d9c8a15a7bca890c24a2d5d835e36b4cb1fb6dbf32157be5350fb5d42c8247-1747047358"600
TXT"anthropic-domain-verification-pm3n7s=KgAk1MD4dq8iEtjgIccPmazew"600
TXT"_xtcmvqd0o7ant8if7dzjjz4zzld9kaa"600
TXT"atlassian-domain-verification=01vX6jaMzr6JB2z4nsExriYXWSA/AgtOEuDbxbgZoTMByB5LnEYM083dkKADMdHj"600
TXT"49f4ddhpk85zc8d1xnnby2r4vztmjy8b"600
TXT"notion-domain-verification=8RWmFx3kfQzwlciOboDe0ig4E1C8PgBUiTadSjYlIOd"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, NS 1d.
  • ✓ 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