kleinerperkins.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 · MarkMonitor Inc. · expires 2028-01-20

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
20 January 2003
Last changed
19 December 2025
Expires
20 January 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
adam.ns.cloudflare.com, ariella.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 2028-01-20 #3
    The registration is valid until 2028-01-20 (455 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update 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

adam.ns.cloudflare.com, ariella.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
adam.ns.cloudflare.com, ariella.ns.cloudflare.com
NS in the zone
adam.ns.cloudflare.com, ariella.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
adam.ns.cloudflare.com173.245.59.54 172.64.33.54 108.162.193.54 2a06:98c1:50::ac40:2136 2606:4700:58::adf5:3b36 2803:f800:50::6ca2:c136AS13335 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., US108.162.193.54 172.64.33.54 173.245.59.54 2606:4700:58::adf5:3b36 2803:f800:50::6ca2:c136 2a06:98c1:50::ac40:2136
ariella.ns.cloudflare.com162.159.38.32 172.64.34.32 108.162.194.32 2803:f800:50::6ca2:c220 2a06:98c1:50::ac40:2220 2606:4700:50::a29f:2620AS13335 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., US108.162.194.32 162.159.38.32 172.64.34.32 2606:4700:50::a29f:2620 2803:f800:50::6ca2:c220 2a06:98c1:50::ac40:2220

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: adam.ns.cloudflare.com, ariella.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
adam.ns.cloudflare.com 173.245.59.54NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
adam.ns.cloudflare.com 172.64.33.54NOERROR, 20 ms, authoritativenoyes / yesrefused2026.10.2
adam.ns.cloudflare.com 108.162.193.54NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
adam.ns.cloudflare.com 2a06:98c1:50::ac40:2136NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
adam.ns.cloudflare.com 2606:4700:58::adf5:3b36NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
adam.ns.cloudflare.com 2803:f800:50::6ca2:c136NOERROR, 18 ms, authoritativenoyes / yesrefused2026.10.2
ariella.ns.cloudflare.com 162.159.38.32NOERROR, 33 ms, authoritativenoyes / yesrefused2026.10.2
ariella.ns.cloudflare.com 172.64.34.32NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
ariella.ns.cloudflare.com 108.162.194.32NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
ariella.ns.cloudflare.com 2803:f800:50::6ca2:c220NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
ariella.ns.cloudflare.com 2a06:98c1:50::ac40:2220NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
ariella.ns.cloudflare.com 2606:4700:50::a29f:2620NOERROR, 17 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: adam.ns.cloudflare.com: "2026.10.2"; ariella.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 2416454763 · primary adam.ns.cloudflare.com

Found

Primary (MNAME)
adam.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2416454763
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
adam.ns.cloudflare.com (173.245.59.54)2416454763
adam.ns.cloudflare.com (172.64.33.54)2416454763
adam.ns.cloudflare.com (108.162.193.54)2416454763
adam.ns.cloudflare.com (2a06:98c1:50::ac40:2136)2416454763
adam.ns.cloudflare.com (2606:4700:58::adf5:3b36)2416454763
adam.ns.cloudflare.com (2803:f800:50::6ca2:c136)2416454763
ariella.ns.cloudflare.com (162.159.38.32)2416454763
ariella.ns.cloudflare.com (172.64.34.32)2416454763
ariella.ns.cloudflare.com (108.162.194.32)2416454763
ariella.ns.cloudflare.com (2803:f800:50::6ca2:c220)2416454763
ariella.ns.cloudflare.com (2a06:98c1:50::ac40:2220)2416454763
ariella.ns.cloudflare.com (2606:4700:50::a29f:2620)2416454763

Checks

  • ✓ Serial 2416454763 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 adam.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 2416454763 is a Unix timestamp (2046-07-29 05:26 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

33 records at the apex

Found

Read from
173.245.59.54:53
TypeValueTTL
SOAadam.ns.cloudflare.com. dns.cloudflare.com. 2416454763 10000 2400 604800 18001800
NSadam.ns.cloudflare.com.86400
NSariella.ns.cloudflare.com.86400
A104.18.19.44300
A104.18.18.44300
AAAA2606:4700::6812:132c300
AAAA2606:4700::6812:122c300
MX10 us-smtp-inbound-1.mimecast.com.300
MX10 us-smtp-inbound-2.mimecast.com.300
TXT"FDB5F5018B"30
TXT"MS=ms59569078"30
TXT"MS=ms71236846"30
TXT"ZOOM_verify_QpNnQaIBSKi9hiKo6R-2Mw"30
TXT"ZOOM_verify_psv9l1S2tKc4ENc3Q4dxK9"30
TXT"adobe-idp-site-verification=46e1dc864a5af9018ebf72c87779bd67c67a5350af229e68ff998ab289102497"30
TXT"anthropic-domain-verification-x05t7g=VkcMYSsEcUuGYKMwdtC60DrQB"30
TXT"apple-domain-verification=p6seSs9LO4XqB9e8"30
TXT"google-site-verification=9g7h4pd5ZDHdqDiTYYpKFdqBbhi4_Wqhb87PsDNSeW0"30
TXT"google-site-verification=IA-TIMUPeI0EZSpHAx_oWRL0EqZl41VkOPhjxK-psIU"30
TXT"google-site-verification=dW5oxqc-73gtnQ4u_5CkZ3VxOeocuwD1b4D2plHakSU"30
TXT"google-site-verification=ksVywZCS66RRj4bDJXcyUid6dPI0pPqcfhGTgGZtqOE"30
TXT"google-site-verification=o6OMTY2g20WVCzkpuAyPuf-C5xL6ELf7OB8HSWZt39Q"30
TXT"https://kp.slack.com/archives/G0112LE2QJ1/p1774275036304139"30
TXT"include:_oktaverification.www.kleinerperkins.com"30
TXT"loom-site-verification=bf0bf4cc23374da7aab0453913a4a6ed"30
TXT"notion-domain-verification=2WnnodYpHnubgGetTiBiuQDhWUUmrF2Fkh47dNLXIB7"30
TXT"pardot1038003=2a3cb98b36c767aba97b837a17f079dfff99e9ac6475c0c61c5b0ce0508771c2"30
TXT"scp9jr7bgndm35pyhwzqxbcmvx4p1m5y"30
TXT"sending_domain1038003=3658869fccb0234148081d26af4035ff257b54a8bb42899c0ec601dd976c1d02"30
TXT"serval-domain-verification-y42c2z=TvJ2uypcO67RDFpgeBw763zwj"30
TXT"slack-domain-verification=2DIJ7M76gy3tdJcgV3Cxyi7XuV2rIqsqwtF6XMSt"30
TXT"trusona=siGk4dMDYmPZphBlRiqsJUqSL4LYPq2UPOdDVFPu07pIKQmv4"30
TXT"v=spf1 include:spf.protection.outlook.com include:us._netblocks.mimecast.com include:spfhost.messageprovider.com include:kleinerperkins.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all"30

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