knightlab.com

Checked 22 October 2026, 09:32 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 5 info

Registration

warn

.com generic · Amazon Registrar, Inc. · expires 2026-12-03

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Amazon Registrar, Inc.
Registered
3 December 2010
Last changed
14 May 2026
Expires
3 December 2026
Status
client transfer prohibited
Registry nameservers
abby.ns.cloudflare.com, piotr.ns.cloudflare.com
RDAP server
https://rdap.verisign.com/com/v1/
Lookup error: DNS query for com failed: read udp 46.225.38.91:45580->8.8.8.8:53: i/o timeout

Checks

  • i
    Could not be checked
    The TLD lookup failed, so this could not be checked: DNS query for com failed: read udp 46.225.38.91:45580->8.8.8.8:53: i/o timeout
    #1
  • !
    TLD not DNSSEC-signed
    The root has no DS record for .com, so DNSSEC for domains under it can't be validated.
    #2
  • ✓ Expires on 2026-12-03 #3
    The registration is valid until 2026-12-03 (42 days).
  • ✓ 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

info

abby.ns.cloudflare.com, piotr.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
abby.ns.cloudflare.com, piotr.ns.cloudflare.com
NS in the zone
abby.ns.cloudflare.com, piotr.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
abby.ns.cloudflare.com108.162.192.100 172.64.32.100 173.245.58.100 2606:4700:50::adf5:3a64 2803:f800:50::6ca2:c064 2a06:98c1:50::ac40:2064AS13335 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., US108.162.192.100 172.64.32.100 173.245.58.100 2606:4700:50::adf5:3a64 2803:f800:50::6ca2:c064 2a06:98c1:50::ac40:2064
piotr.ns.cloudflare.com173.245.59.222 108.162.193.222 172.64.33.222 2a06:98c1:50::ac40:21de 2606:4700:58::adf5:3bde 2803:f800:50::6ca2:c1deAS13335 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., US108.162.193.222 172.64.33.222 173.245.59.222 2606:4700:58::adf5:3bde 2803:f800:50::6ca2:c1de 2a06:98c1:50::ac40:21de

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: abby.ns.cloudflare.com, piotr.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
abby.ns.cloudflare.com 108.162.192.100NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
abby.ns.cloudflare.com 172.64.32.100NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
abby.ns.cloudflare.com 173.245.58.100NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
abby.ns.cloudflare.com 2606:4700:50::adf5:3a64NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
abby.ns.cloudflare.com 2803:f800:50::6ca2:c064NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
abby.ns.cloudflare.com 2a06:98c1:50::ac40:2064NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
piotr.ns.cloudflare.com 173.245.59.222NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
piotr.ns.cloudflare.com 108.162.193.222NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
piotr.ns.cloudflare.com 172.64.33.222NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
piotr.ns.cloudflare.com 2a06:98c1:50::ac40:21deNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
piotr.ns.cloudflare.com 2606:4700:58::adf5:3bdeNOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
piotr.ns.cloudflare.com 2803:f800:50::6ca2:c1deNOERROR, 19 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: abby.ns.cloudflare.com: "2026.10.2"; piotr.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 2415908629 · primary abby.ns.cloudflare.com

Found

Primary (MNAME)
abby.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2415908629
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
abby.ns.cloudflare.com (108.162.192.100)2415908629
abby.ns.cloudflare.com (172.64.32.100)2415908629
abby.ns.cloudflare.com (173.245.58.100)2415908629
abby.ns.cloudflare.com (2606:4700:50::adf5:3a64)2415908629
abby.ns.cloudflare.com (2803:f800:50::6ca2:c064)2415908629
abby.ns.cloudflare.com (2a06:98c1:50::ac40:2064)2415908629
piotr.ns.cloudflare.com (173.245.59.222)2415908629
piotr.ns.cloudflare.com (108.162.193.222)2415908629
piotr.ns.cloudflare.com (172.64.33.222)2415908629
piotr.ns.cloudflare.com (2a06:98c1:50::ac40:21de)2415908629
piotr.ns.cloudflare.com (2606:4700:58::adf5:3bde)2415908629
piotr.ns.cloudflare.com (2803:f800:50::6ca2:c1de)2415908629

Checks

  • ✓ Serial 2415908629 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 abby.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 2415908629 is a Unix timestamp (2046-07-22 21:43 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

6 records at the apex

Found

Read from
108.162.192.100:53
TypeValueTTL
SOAabby.ns.cloudflare.com. dns.cloudflare.com. 2415908629 10000 2400 604800 18001800
NSabby.ns.cloudflare.com.86400
NSpiotr.ns.cloudflare.com.86400
A23.23.237.182300
MX0 knightlab.com.300
TXT"google-site-verification=b-87HpeQvZN6Mf-N-yUHWs31OJwF6S8eX44MroCd8D8"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 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