svlfg.de

Checked 22 October 2026, 00:31 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 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

warn

ns1.bios-online.de, ns2.bios-online.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.bios-online.de, ns2.bios-online.de
NS in the zone
ns1.bios-online.de, ns2.bios-online.de
NameserverAddressesNetwork (AS)Glue
ns1.bios-online.de217.31.82.10AS29140 HOSTSERVER-AS - Hostserver GmbH, DE-
ns2.bios-online.de62.116.145.206AS15456 INTERNETX-AS - InterNetX GmbH, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.bios-online.de, ns2.bios-online.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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS15456 (INTERNETX-AS - InterNetX GmbH, DE): 1 address; AS29140 (HOSTSERVER-AS - Hostserver GmbH, DE): 1 address.
  • 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.bios-online.de 217.31.82.10NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns2.bios-online.de 62.116.145.206NOERROR, 10 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2026101900 · primary ns1.bios-online.de

Found

Primary (MNAME)
ns1.bios-online.de
Contact (RNAME)
hostmaster.adns2.de
Serial
2026101900
Refresh / retry
39940 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.bios-online.de (217.31.82.10)2026101900
ns2.bios-online.de (62.116.145.206)2026101900

Checks

  • ✓ Serial 2026101900 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 11h5m40s, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.bios-online.de is one of the listed nameservers.
  • ✓ Contact hostmaster@adns2.de #25
    The SOA RNAME hostmaster.adns2.de means hostmaster@adns2.de.
  • ✓ Date-based serial #26
    The serial 2026101900 follows the YYYYMMDDnn convention (2026-10-19).

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

14 records at the apex

Found

Read from
217.31.82.10:53
TypeValueTTL
SOAns1.bios-online.de. hostmaster.adns2.de. 2026101900 39940 7200 604800 8640086400
NSns1.bios-online.de.86400
NSns2.bios-online.de.86400
A185.152.220.1703600
MX60 mx4.svlfg.de.900
MX10 mail.svlfg.de.900
MX50 mx2.svlfg.de.900
TXT"asap-site-verification-faeecfa9-5b3c-48ae-91d3-5ce9f0fb4e5e"3600
TXT"MS=6706A3E918A6186E636D9495B9327AFD62BDA237"3600
TXT"cisco-ci-domain-verification=7a96c8ebf63fe9fe322e4378c3699774ce855eea1aca4180dc1008dc69d6889e"3600
TXT"adobe-idp-site-verification=dc109dca6f85afa53c8fd53ff23119ddb69248ddde39c4ae0bb83dede3284154"3600
TXT"v=spf1 mx a:mailout01-011.syncpilot.com a:mailout02-011.syncpilot.com ip4:185.152.220.0/22 ip4:185.251.178.0/24 include:spf.protection.outlook.com ~all"900
TXT"ppe-ef6e673e211a0b5c3f96e2996efb5a08706eb1de"3600
TXT"apple-domain-verification=wEYAztX2dcDGgyEz"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 15m, 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