netcup.com

Checked 22 October 2026, 10:01 UTC · via 8.8.8.8
!Passed with warnings
25 passed 1 warning 0 failed 5 info

Registration

info

.com generic · EPAG Domainservices GmbH · expires 2027-05-03

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
EPAG Domainservices GmbH
Registered
3 May 2001
Last changed
4 May 2026
Expires
3 May 2027
Status
active
Registry nameservers
acns01.xaas.systems, acns02.xaas.systems, acns03.xaas.systems, acns04.xaas.systems, acns05.xaas.systems
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 on 2027-05-03 #3
    The registration is valid until 2027-05-03 (193 days).
  • i
    No transfer lock
    The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.
    #4
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

acns01.xaas.systems, acns02.xaas.systems, acns03.xaas.systems, acns04.xaas.systems, acns05.xaas.systems

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
acns01.xaas.systems, acns02.xaas.systems, acns03.xaas.systems, acns04.xaas.systems, acns05.xaas.systems
NS in the zone
acns01.xaas.systems, acns02.xaas.systems, acns03.xaas.systems, acns04.xaas.systems, acns05.xaas.systems
NameserverAddressesNetwork (AS)Glue
acns01.xaas.systems217.146.18.1 2a00:11c0:aa1::1AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT-
acns02.xaas.systems188.172.248.1 2a05:8900:aa1::1AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT-
acns03.xaas.systems213.227.160.1 2605:380:aa1::1AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT-
acns04.xaas.systems213.227.191.1 2803:ad80:aa1::1AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT-
acns05.xaas.systems185.81.208.1 2a00:11c0:1010::1AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT AS42388 ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT-

Checks

  • ✓ 5 nameservers #6
    Delegated to acns01.xaas.systems, acns02.xaas.systems, acns03.xaas.systems, acns04.xaas.systems, acns05.xaas.systems.
  • ✓ 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 5 IPv4 /24s and 5 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS42388 (ANX-CLOUDDNS - Anexia Cloud Solutions GmbH, AT): 10 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .systems
    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

pass

10 of 10 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
acns01.xaas.systems 217.146.18.1NOERROR, 3 ms, authoritativenoyes / yesrefused-
acns01.xaas.systems 2a00:11c0:aa1::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
acns02.xaas.systems 188.172.248.1NOERROR, 5 ms, authoritativenoyes / yesrefused-
acns02.xaas.systems 2a05:8900:aa1::1NOERROR, 10 ms, authoritativenoyes / yesrefused-
acns03.xaas.systems 213.227.160.1NOERROR, 4 ms, authoritativenoyes / yesrefused-
acns03.xaas.systems 2605:380:aa1::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
acns04.xaas.systems 213.227.191.1NOERROR, 9 ms, authoritativenoyes / yesrefused-
acns04.xaas.systems 2803:ad80:aa1::1NOERROR, 15 ms, authoritativenoyes / yesrefused-
acns05.xaas.systems 185.81.208.1NOERROR, 4 ms, authoritativenoyes / yesrefused-
acns05.xaas.systems 2a00:11c0:1010::1NOERROR, 5 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 10 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 84 · primary acns05.xaas.systems

Found

Primary (MNAME)
acns05.xaas.systems
Contact (RNAME)
mail.netcup.de
Serial
84
Refresh / retry
14400 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
acns01.xaas.systems (217.146.18.1)84
acns01.xaas.systems (2a00:11c0:aa1::1)84
acns02.xaas.systems (188.172.248.1)84
acns02.xaas.systems (2a05:8900:aa1::1)84
acns03.xaas.systems (213.227.160.1)84
acns03.xaas.systems (2605:380:aa1::1)84
acns04.xaas.systems (213.227.191.1)84
acns04.xaas.systems (2803:ad80:aa1::1)84
acns05.xaas.systems (185.81.208.1)84
acns05.xaas.systems (2a00:11c0:1010::1)84

Checks

  • ✓ Serial 84 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver acns05.xaas.systems is one of the listed nameservers.
  • ✓ Contact mail@netcup.de #25
    The SOA RNAME mail.netcup.de means mail@netcup.de.
  • ✓ Counter serial #26
    The serial 84 is a plain counter.

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

13 records at the apex

Found

Read from
217.146.18.1:53
TypeValueTTL
SOAacns05.xaas.systems. mail.netcup.de. 84 14400 3600 604800 36003600
NSacns04.xaas.systems.3600
NSacns01.xaas.systems.3600
NSacns02.xaas.systems.3600
NSacns05.xaas.systems.3600
NSacns03.xaas.systems.3600
A144.208.243.2600
AAAA2605:380:52:5:144:208:243:2600
MX5 cloudpowered.email.3600
TXT"brevo-code:31869d3fec427f23378b4e012594c529"3600
TXT"google-site-verification=G2D77DnJSrTViirqqEUxIdw0lnvRxPrDvs5PjQfQDhQ"3600
TXT"google-site-verification=Sjvdf2zyUWxje8KuBCvK8wN-wtzn09vxLjxaiM5dDRI"3600
TXT"v=spf1 a mx include:spf.cloudpowered.email -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, AAAA 10m, MX 1h, NS 1h. The NS TTL at the parent is 2d 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