l.de

Checked 21 October 2026, 23:11 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

info

x.ns.sgx-leipzig.de, y.ns.sgx-leipzig.de, z.ns.sgx-leipzig.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
x.ns.sgx-leipzig.de, y.ns.sgx-leipzig.de, z.ns.sgx-leipzig.de
NS in the zone
x.ns.sgx-leipzig.de, y.ns.sgx-leipzig.de, z.ns.sgx-leipzig.de
NameserverAddressesNetwork (AS)Glue
x.ns.sgx-leipzig.de212.6.40.225 2a10:1f40:1:6::1AS211007 AS_NetzLeipzig - Netz Leipzig GmbH, DE AS211007 AS_NetzLeipzig - Netz Leipzig GmbH, DE212.6.40.225 2a10:1f40:1:6::1
y.ns.sgx-leipzig.de212.6.40.226 2a10:1f40:1:6::2AS211007 AS_NetzLeipzig - Netz Leipzig GmbH, DE AS211007 AS_NetzLeipzig - Netz Leipzig GmbH, DE212.6.40.226 2a10:1f40:1:6::2
z.ns.sgx-leipzig.de85.232.11.170 2a02:238:1:f084::170AS16097 HLKOMM - HL komm Telekommunikations GmbH, DE AS16097 HLKOMM - HL komm Telekommunikations GmbH, DE85.232.11.170 2a02:238:1:f084::170

Checks

  • ✓ 3 nameservers #6
    Delegated to x.ns.sgx-leipzig.de, y.ns.sgx-leipzig.de, z.ns.sgx-leipzig.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 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS16097 (HLKOMM - HL komm Telekommunikations GmbH, DE): 2 addresses; AS211007 (AS_NetzLeipzig - Netz Leipzig GmbH, DE): 4 addresses.
  • 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
x.ns.sgx-leipzig.de 212.6.40.225NOERROR, 9 ms, authoritativenoyes / yesrefusedNetzLeipzig DNS (310)
x.ns.sgx-leipzig.de 2a10:1f40:1:6::1NOERROR, 10 ms, authoritativenoyes / yesrefusedNetzLeipzig DNS (310)
y.ns.sgx-leipzig.de 212.6.40.226NOERROR, 8 ms, authoritativenoyes / yesrefusedNetzLeipzig DNS (410)
y.ns.sgx-leipzig.de 2a10:1f40:1:6::2NOERROR, 9 ms, authoritativenoyes / yesrefusedNetzLeipzig DNS (411)
z.ns.sgx-leipzig.de 85.232.11.170NOERROR, 10 ms, authoritativenoyes / yesrefusedNetzLeipzig DNS (510)
z.ns.sgx-leipzig.de 2a02:238:1:f084::170NOERROR, 11 ms, authoritativenoyes / yesrefusedNetzLeipzig DNS (510)

Checks

  • ✓ All respond #14
    All 6 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: x.ns.sgx-leipzig.de: "NetzLeipzig DNS (310)"; y.ns.sgx-leipzig.de: "NetzLeipzig DNS (410)"; y.ns.sgx-leipzig.de: "NetzLeipzig DNS (411)"; z.ns.sgx-leipzig.de: "NetzLeipzig DNS (510)".
    #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 2026102003 · primary x.ns.sgx-leipzig.de

Found

Primary (MNAME)
x.ns.sgx-leipzig.de
Contact (RNAME)
hostmaster.sgx-leipzig.de
Serial
2026102003
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
x.ns.sgx-leipzig.de (212.6.40.225)2026102003
x.ns.sgx-leipzig.de (2a10:1f40:1:6::1)2026102003
y.ns.sgx-leipzig.de (212.6.40.226)2026102003
y.ns.sgx-leipzig.de (2a10:1f40:1:6::2)2026102003
z.ns.sgx-leipzig.de (85.232.11.170)2026102003
z.ns.sgx-leipzig.de (2a02:238:1:f084::170)2026102003

Checks

  • ✓ Serial 2026102003 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver x.ns.sgx-leipzig.de is one of the listed nameservers.
  • ✓ Contact hostmaster@sgx-leipzig.de #25
    The SOA RNAME hostmaster.sgx-leipzig.de means hostmaster@sgx-leipzig.de.
  • ✓ Date-based serial #26
    The serial 2026102003 follows the YYYYMMDDnn convention (2026-10-20).

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

warn

28 records at the apex

Found

Read from
212.6.40.225:53
TypeValueTTL
SOAx.ns.sgx-leipzig.de. hostmaster.sgx-leipzig.de. 2026102003 10800 3600 604800 9003600
NSx.ns.sgx-leipzig.de.86400
NSz.ns.sgx-leipzig.de.86400
NSy.ns.sgx-leipzig.de.86400
A172.66.167.193137
A104.20.42.147137
AAAA2606:4700:10::ac42:a7c129
AAAA2606:4700:10::6814:2a9329
MX10 mr01.l.de.86400
MX20 mr02.l.de.86400
TXT"_n89fy79hdduv3ydwitvb7rbwf4f1wyj"3600
TXT"_m2n58eoqegje6f2ojofzgm0latyddsq"3600
TXT"google-site-verification=SHiPm2BfeaBtUKdZh_kelvEPiJXlJkvxgt_--god21Q"3600
TXT"apple-domain-verification=NtXJjMkODXDQiuQq"3600
TXT"_f5qt55mnf1yr4w4dnd3zlo3v4b6nwwj"3600
TXT"v=spf1 mx ip4:212.202.227.154 ip4:212.6.40.72 include:spf.protection.outlook.com include:amazonses.com include:spf.mailjet.com -all"3600
TXT"atlassian-domain-verification=qAkUVUdjLZ5iyYEba4aKVykDWNCBFA3mqo1TuVBDNenn4f4LQgt6jWChSSa1uIqw"3600
TXT"_globalsign-domain-verification=QNDipd_lkggrl7M5Amko030UW6Aib61ck9FXj-2vnO"3600
TXT"2w/fZ/1tkYd8kxK07OZaklymKK6aDz12wJDHrPFO/rh4KVelSqgxQiUoi49/FLnmeFKnXlr2GZZGvnktKipmmA=="3600
TXT"swisssign-check=tLQA47Dp6YNfSAyvwm4ioaqhNd0"3600
TXT"phk2w96t0f9rlb6m4zp6wnx23xh6fq21"3600
TXT"_ziszhcn83uij6ahvjyur3l6f3kl746e"3600
TXT"202110122356392v322si9h6xh85gb35opf90gs0uh9dkgef9gqle1iuzeja25n6"3600
TXT"p/alrOsYBlpHkG8r31YxXFsGQq2Tse7tSWTzKsSzpgUIa/tDmrQ+8qRhmv2Ff99JTJwnrNgQtxYC4Fskup3s6w=="3600
TXT"d365mktkey=DTPb53xobjT3o7Pw7vSeRxfY0mojYe4iWx7NPR7kgX4x"3600
TXT"_rpb5oxt5xbjb2mrl6h8a3wbntyvdfp7"3600
TXT"MS=ms30224816"3600
TXT"CA261005-0021"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (2m17s), AAAA (29s). Low TTLs are useful just before a planned change.
    #32
  • ✓ 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