knauf.com

Checked 22 October 2026, 09:32 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-07-21

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
22 July 1997
Last changed
17 July 2026
Expires
21 July 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
aaron.ns.cloudflare.com, virginia.ns.cloudflare.com
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 2027-07-21 #3
    The registration is valid until 2027-07-21 (271 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

aaron.ns.cloudflare.com, virginia.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
aaron.ns.cloudflare.com, virginia.ns.cloudflare.com
NS in the zone
aaron.ns.cloudflare.com, virginia.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
aaron.ns.cloudflare.com108.162.195.150 162.159.44.150 172.64.35.150 2803:f800:50::6ca2:c396 2a06:98c1:50::ac40:2396 2606:4700:58::a29f:2c96AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.195.150 162.159.44.150 172.64.35.150 2606:4700:58::a29f:2c96 2803:f800:50::6ca2:c396 2a06:98c1:50::ac40:2396
virginia.ns.cloudflare.com162.159.38.37 172.64.34.37 108.162.194.37 2a06:98c1:50::ac40:2225 2803:f800:50::6ca2:c225 2606:4700:50::a29f:2625AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.194.37 162.159.38.37 172.64.34.37 2606:4700:50::a29f:2625 2803:f800:50::6ca2:c225 2a06:98c1:50::ac40:2225

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: aaron.ns.cloudflare.com, virginia.ns.cloudflare.com.
    #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 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 12 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 .com
    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
aaron.ns.cloudflare.com 108.162.195.150NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 162.159.44.150NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 172.64.35.150NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 2803:f800:50::6ca2:c396NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 2a06:98c1:50::ac40:2396NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
aaron.ns.cloudflare.com 2606:4700:58::a29f:2c96NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 162.159.38.37NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 172.64.34.37NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 108.162.194.37NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 2a06:98c1:50::ac40:2225NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 2803:f800:50::6ca2:c225NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
virginia.ns.cloudflare.com 2606:4700:50::a29f:2625NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2

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: aaron.ns.cloudflare.com: "2026.10.2"; virginia.ns.cloudflare.com: "2026.10.2". 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

pass

serial 2417981892 · primary aaron.ns.cloudflare.com

Found

Primary (MNAME)
aaron.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417981892
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
aaron.ns.cloudflare.com (108.162.195.150)2417981892
aaron.ns.cloudflare.com (162.159.44.150)2417981892
aaron.ns.cloudflare.com (172.64.35.150)2417981892
aaron.ns.cloudflare.com (2803:f800:50::6ca2:c396)2417981892
aaron.ns.cloudflare.com (2a06:98c1:50::ac40:2396)2417981892
aaron.ns.cloudflare.com (2606:4700:58::a29f:2c96)2417981892
virginia.ns.cloudflare.com (162.159.38.37)2417981892
virginia.ns.cloudflare.com (172.64.34.37)2417981892
virginia.ns.cloudflare.com (108.162.194.37)2417981892
virginia.ns.cloudflare.com (2a06:98c1:50::ac40:2225)2417981892
virginia.ns.cloudflare.com (2803:f800:50::6ca2:c225)2417981892
virginia.ns.cloudflare.com (2606:4700:50::a29f:2625)2417981892

Checks

  • ✓ Serial 2417981892 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver aaron.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2417981892 is a Unix timestamp (2046-08-15 21:38 UTC).

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

47 records at the apex

Found

Read from
108.162.195.150:53
TypeValueTTL
SOAaaron.ns.cloudflare.com. dns.cloudflare.com. 2417981892 10000 2400 604800 18001800
NSaaron.ns.cloudflare.com.86400
NSvirginia.ns.cloudflare.com.86400
A172.64.155.171300
A104.18.32.85300
AAAA2a06:98c1:3103::ac40:9bab300
AAAA2606:4700:4404::6812:2055300
MX10 mailstream-eu1.mxrecord.io.300
TXT"00D0X000000tBFD=1TBTy00000006lN"300
TXT"00D9M00000H4ECH=1TB9M0000000Of3"300
TXT"00D9M00000OWbUr=1TB9M0000000MAD"300
TXT"00DFg00000LxQon=1TBFg00000050vR"300
TXT"KlBj5lpkGf2o3mSB7rCguA2vHOt2JF39C0D6iXnP1v93yF/nSbz+0ex494nrcXo8Kdt8o0LFs8VyFBsZhTGcAQ=="300
TXT"MS=ms69815095"300
TXT"_5bjjf4zw5vecihx2tfhld3dn2ltla54"300
TXT"_globalsign-domain-verification=5ej4_s0tz9fkUL0xp9qL5vQcLrWwzcozf10oeOr4bC"300
TXT"_globalsign-domain-verification=66bVmwuH4xqCrCDqGPVouPwfuKMTBzB6VabrWB-BcA"300
TXT"_globalsign-domain-verification=QRYNbyCmBa1FytVU7jUq47x8oxKD0vx0T5BRl73pyJ"300
TXT"_globalsign-domain-verification=vJLLHNpr5RZSEBpj6V8D5KboX9XWeuXksnKFNISKaL"300
TXT"adobe-idp-site-verification=d04a867d1bf7208af1d94176eb8572b5bc02de0f7f2788cf27fbba2467f69ef2"300
TXT"apple-domain-verification=9xP44XMawO96USXT"300
TXT"atlassian-domain-verification=70GqHrluIKB0DlW53dSuqFSbFlhlfZlApKbP2E3g3PR8EoOJNkl/coLmRJK97vOn"300
TXT"brevo-code:e9fa090dd2083571a6211959b6b7fb3f"300
TXT"bv-domain-verification=a636c610a3d19b6bcb71849ed70361e168643ed855cb317d4bcb1c1becfca48a"300
TXT"canva-site-verification=SZPz0dQ-ZwP5Ey7QUcdhIA"300
TXT"docker-verification=42b40b36-f735-470e-a982-6f25e455ea4c"300
TXT"flexera-domain-verification-ockxvsdmdfgainxt"300
TXT"flexera-domain-verification-twrdqtddwabufuvt"300
TXT"google-gws-recovery-domain-verification=62593912"300
TXT"google-site-verification=E4a3-4Zw_9Tp3bseuuBCkbQXgRX8mP8HbDAmyyxml_A"300
TXT"google-site-verification=H4-wmJdrW4db03U8lWeZBmTUCfWWSx28E-7JeYe1Iv8"300
TXT"google-site-verification=OoMGa_JfaaD3damDLwJD7jEjBJjXBXrjriHiPRpybls"300
TXT"ibmid=0336e5cd-166b-497d-876c-12004ee06d4b"300
TXT"infoblox-domain-mastery=923a83390fb3dda567d58fec363d172f96a86276c92de5b5071c1a4b8834630a61"300
TXT"jamf-site-verification=XMj_nc0Wac2VjHZWwCSGSg"300
TXT"linkedin-site-verification=9d94dd8a-ad88-4fca-ba0f-7ccdeb09c740"300
TXT"logmein-verification-code=9e388bbb-6560-4ac3-b791-23f55fe7341e"300
TXT"miro-verification=72ff53054bd883f89f1694fea716d84ce0e88228"300
TXT"msfpkey=3f7embobxe4lwlofisf2omfrj"300
TXT"new-relic-domain-verification=eb88a0a7eea74e92a3059b023989e0ae"300
TXT"smartsheet-site-validation=gCZn5Z325CY90K0CRRSJ01QmILOq1YkM"300
TXT"successfactors-site-verification=NzEyZGNjM2Y0NDM0NjUxYmM0NDdlMzdjYjMwOWJhMTMxZTY3YTY3NGM5Yjc1N2MwNmZiYTM3OTA3NDI2NTQ5MA=="300
TXT"teamtailor=0854e7db40bc4a8d2be606fad3af5899"300
TXT"teamtailor=a5a74455adfb43dc8c38ab7c41912241"300
TXT"teamtailor=c975bb7ab0097cf1807eee9e2e13c6be"300
TXT"v=1;b=off;k=zia"300
TXT"v=spf1 ip4:18.141.248.4 ip4:3.125.230.255 ip4:198.245.81.0/24 ip4:136.147.176.0/24 ip4:13.111.0.0/16 ip4:157.90.94.187 ip4:212.2.69.178 ip4:82.210.238.38 ip4:82.210.238.39 ip4:136.147.182.0/24 ip4:136.147.135.0/24 ip4:199.122.123.0/24 ip4:103.151.192.0/23" " ip4:185.12.80.0/22 ip4:188.172.128.0/20 ip4:192.161.144.0/20 ip4:216.198.0.0/18 ip4:86.59.12.25 ip4:86.59.12.47 ip4:86.59.12.31 ip4:150.60.232.72 ip4:193.228.122.60 ip4:193.228.122.61 ip4:52.49.235.189 ip4:52.49.201.246 ip4:147.160.167.0/26 ip4:23.21.109" ".212 ip4:23.21.109.197 ip4:94.231.81.6 ip4:213.95.132.52 ip4:213.155.74.87 ip4:213.155.74.157 ip4:213.155.74.23 ip4:213.155.74.133 a:c.spf.service-now.com include:spf.protection.outlook.com include:ciphr247.com include:spf-mailer-knauf.aufwind-solu" "tions.de include:sendgrid.net include:agenturserver.de exists:%{i}._spf.mta.salesforce.com include:amazonses.com include:25192585.spf02.hubspotemail.net ~all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 5m, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; 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