schueco.com

Checked 22 October 2026, 10:34 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 warnings 0 failed 6 info

Registration

warn

.com generic · InterNetX GmbH · expires 2026-11-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
InterNetX GmbH
Registered
9 November 1998
Last changed
9 November 2025
Expires
8 November 2026
Status
client transfer prohibited
Registry nameservers
linbicos.bicos.de, ns3.bicos.de, ns4.bicos.de
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • !
    Expires in 16 days
    The registration expires on 2026-11-08. Make sure it is renewed.
    #3
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

linbicos.bicos.de, ns3.bicos.de, ns4.bicos.de

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
linbicos.bicos.de, ns3.bicos.de, ns4.bicos.de
NS in the zone
linbicos.bicos.de, ns2.bicos.de, ns4.bicos.de
NameserverAddressesNetwork (AS)Glue
linbicos.bicos.de212.100.32.1 2a00:d58::212:100:32:1 2a00:d58::1AS12466 BICOS - Bicos Computer GmbH, DE AS12466 BICOS - Bicos Computer GmbH, DE AS12466 BICOS - Bicos Computer GmbH, DE-
ns2.bicos.de (zone only)193.24.2.221AS12466 BICOS - Bicos Computer GmbH, DE-
ns3.bicos.de (parent only)193.24.2.222 2a00:d58::5AS12466 BICOS - Bicos Computer GmbH, DE AS12466 BICOS - Bicos Computer GmbH, DE-
ns4.bicos.de195.4.173.228AS60175 WAG - Wortmann AG, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to linbicos.bicos.de, ns3.bicos.de, ns4.bicos.de.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns3.bicos.de; only in the zone: ns2.bicos.de. linbicos.bicos.de, ns2.bicos.de, ns3.bicos.de, ns4.bicos.de report NS linbicos.bicos.de ns2.bicos.de ns4.bicos.de.
    #7
  • ✓ 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.
  • i
    One address family in one network
    all IPv6 addresses are in 2a00:d58::/48, while the other address family is spread over several networks.
    #10
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12466 (BICOS - Bicos Computer GmbH, DE): 6 addresses; AS60175 (WAG - Wortmann AG, 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns2.bicos.de, ns4.bicos.de.
    #13

Nameservers

info

7 of 7 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
linbicos.bicos.de 212.100.32.1NOERROR, 11 ms, authoritativenoyes / yesrefusedBind
linbicos.bicos.de 2a00:d58::212:100:32:1NOERROR, 12 ms, authoritativenoyes / yesrefusedBind
linbicos.bicos.de 2a00:d58::1NOERROR, 11 ms, authoritativenoyes / yesrefusedBind
ns2.bicos.de 193.24.2.221NOERROR, 9 ms, authoritativenoyes / yesrefusedBind
ns3.bicos.de 193.24.2.222NOERROR, 10 ms, authoritativenoyes / yesrefusedBind
ns3.bicos.de 2a00:d58::5NOERROR, 11 ms, authoritativenoyes / yesrefusedBind
ns4.bicos.de 195.4.173.228NOERROR, 13 ms, authoritativenoyes / yesrefusedBind

Checks

  • ✓ All respond #14
    All 7 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: linbicos.bicos.de: "Bind"; ns2.bicos.de: "Bind"; ns3.bicos.de: "Bind"; ns4.bicos.de: "Bind".
    #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 2026102010 · primary linbicos.bicos.de

Found

Primary (MNAME)
linbicos.bicos.de
Contact (RNAME)
root.linbicos.bicos.de
Serial
2026102010
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
linbicos.bicos.de (212.100.32.1)2026102010
linbicos.bicos.de (2a00:d58::212:100:32:1)2026102010
linbicos.bicos.de (2a00:d58::1)2026102010
ns2.bicos.de (193.24.2.221)2026102010
ns3.bicos.de (193.24.2.222)2026102010
ns3.bicos.de (2a00:d58::5)2026102010
ns4.bicos.de (195.4.173.228)2026102010

Checks

  • ✓ Serial 2026102010 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver linbicos.bicos.de is one of the listed nameservers.
  • ✓ Contact root@linbicos.bicos.de #25
    The SOA RNAME root.linbicos.bicos.de means root@linbicos.bicos.de.
  • ✓ Date-based serial #26
    The serial 2026102010 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

info

31 records at the apex

Found

Read from
212.100.32.1:53
TypeValueTTL
SOAlinbicos.bicos.de. root.linbicos.bicos.de. 2026102010 28800 7200 604800 86400259200
NSns4.bicos.de.259200
NSns2.bicos.de.259200
NSlinbicos.bicos.de.259200
A40.91.211.136300
MX0 schueco-com.mail.protection.outlook.com.600
TXT"_hnhxdos5fwsl7vou63o9c3uq8jerycc"259200
TXT"pardot894741=93983c6f405acb8a06756d304f5984e317c172375968147e69490dfd0517b9b4"259200
TXT"teamviewer-sso-verification=de0c65816db94de0bcfaea59a295b38f"259200
TXT"_5i85i33rged5aqir86ug496l6poc9sp"259200
TXT"_3cb5o1wrpmjw83t9mgrsrd3fv9o2bj2"259200
TXT"apple-domain-verification=ApRdQQlIWzQJUOxK"259200
TXT"figma-domain-verification=508b87eab87bfed1d3f0380481f66e9cf3845c68b6cf1a0e3cac622c21addb2b-1757588825"259200
TXT"_oaavvdsi671km70w5y0jxu93f2yhe0z"259200
TXT"cisco-ci-domain-verification=347463dcfe6e89861ac9a89ccbd5ed0a2401bc188358af05b7dcaad908b5888"259200
TXT"MS=ms95360073"259200
TXT"google-site-verification=wc0_4hHob2XKVGLNWBUGuApPzx16TsEchwvUuRS-6ME"259200
TXT"_l3e4dy2a8e2ilk68xfkmluds7ygyftq"259200
TXT"infoblox-domain-mastery=df9e45bdab1492ce4e70e73916048ff93dfd6b4fefe9857c47a533a70d1b523094"259200
TXT"_f1w9tqsnfa8gs1g5pj8mo7hi3tkkv84"259200
TXT"atlassian-domain-verification=CbVqG5WtJQfHcPda5rf4DZ/7KFHBYYA8cPycaaOlU6fB3Tra6YnuyJZLE0VVdyE0"259200
TXT"6dmwfb/ZgJf3/RM8MkA1PdKSLj59qK8PrbBCeOFKYkWw6tB7QOg5t2N5CwMbfVijV4zWzJKOWMQ6LEYdO27W2Q=="259200
TXT"_ozv0hrfoe6ebdcpqzjbsjmrgeyactz2"259200
TXT"google-site-verification=I3ruBTFepzopd06Uk2OodvEqSt68aXtdMknH8o_Qopw"259200
TXT"v=spf1 include:spf.protection.outlook.com include:spf.flexmail.eu a:b.spf.service-now.com a:c.spf.service-now.com a:d.spf.service-now.com ip4:148.139.0.15 -all"259200
TXT"pardot894741=3fce44190e0cf8b6a1dee62e7c25630f53cb71fdd731eaa1f4f8a0782bac6a1d"259200
TXT"pardot894741=f5c52780a4f18b48cbddbfe1c84c3b3ca6115d3fbeb2e1ed6aae1a735e487092"259200
TXT"_sw6ah2vnm1r8wrvwe68lrlzu6yq4cxg"259200
TXT"pardot894741=00ccc9b807f5b671d1e07b33e32de52534836cfa2fb9de39c386e72613dfad47"259200
TXT"barco-verification=b77fbfcd-ef35-538f-8672-64073789f953"259200
TXT"google-site-verification=5Wb0AS97MEnweg7vHiuaAq-l8RyT-oLmmeZzfXZrEnE"259200

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 10m, NS 3d. The NS TTL at the parent is 2d and in the zone 3d; 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