koa.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 · NameCheap, Inc. · expires 2028-01-05

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
NameCheap, Inc.
Registered
5 January 1999
Last changed
29 January 2025
Expires
5 January 2028
Status
client transfer prohibited
Registry nameservers
rihana.ns.cloudflare.com, roman.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 2028-01-05 #3
    The registration is valid until 2028-01-05 (439 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

rihana.ns.cloudflare.com, roman.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
rihana.ns.cloudflare.com, roman.ns.cloudflare.com
NS in the zone
rihana.ns.cloudflare.com, roman.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
rihana.ns.cloudflare.com173.245.58.244 172.64.32.244 108.162.192.244 2606:4700:50::adf5:3af4 2803:f800:50::6ca2:c0f4 2a06:98c1:50::ac40:20f4AS13335 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., US108.162.192.244 172.64.32.244 173.245.58.244 2606:4700:50::adf5:3af4 2803:f800:50::6ca2:c0f4 2a06:98c1:50::ac40:20f4
roman.ns.cloudflare.com162.159.44.103 108.162.195.103 172.64.35.103 2606:4700:58::a29f:2c67 2a06:98c1:50::ac40:2367 2803:f800:50::6ca2:c367AS13335 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., US108.162.195.103 162.159.44.103 172.64.35.103 2606:4700:58::a29f:2c67 2803:f800:50::6ca2:c367 2a06:98c1:50::ac40:2367

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: rihana.ns.cloudflare.com, roman.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
rihana.ns.cloudflare.com 173.245.58.244NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
rihana.ns.cloudflare.com 172.64.32.244NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
rihana.ns.cloudflare.com 108.162.192.244NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
rihana.ns.cloudflare.com 2606:4700:50::adf5:3af4NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
rihana.ns.cloudflare.com 2803:f800:50::6ca2:c0f4NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
rihana.ns.cloudflare.com 2a06:98c1:50::ac40:20f4NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
roman.ns.cloudflare.com 162.159.44.103NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
roman.ns.cloudflare.com 108.162.195.103NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
roman.ns.cloudflare.com 172.64.35.103NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
roman.ns.cloudflare.com 2606:4700:58::a29f:2c67NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
roman.ns.cloudflare.com 2a06:98c1:50::ac40:2367NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
roman.ns.cloudflare.com 2803:f800:50::6ca2:c367NOERROR, 15 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: rihana.ns.cloudflare.com: "2026.10.2"; roman.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 2418144691 · primary rihana.ns.cloudflare.com

Found

Primary (MNAME)
rihana.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418144691
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
rihana.ns.cloudflare.com (173.245.58.244)2418144691
rihana.ns.cloudflare.com (172.64.32.244)2418144691
rihana.ns.cloudflare.com (108.162.192.244)2418144691
rihana.ns.cloudflare.com (2606:4700:50::adf5:3af4)2418144691
rihana.ns.cloudflare.com (2803:f800:50::6ca2:c0f4)2418144691
rihana.ns.cloudflare.com (2a06:98c1:50::ac40:20f4)2418144691
roman.ns.cloudflare.com (162.159.44.103)2418144691
roman.ns.cloudflare.com (108.162.195.103)2418144691
roman.ns.cloudflare.com (172.64.35.103)2418144691
roman.ns.cloudflare.com (2606:4700:58::a29f:2c67)2418144691
roman.ns.cloudflare.com (2a06:98c1:50::ac40:2367)2418144691
roman.ns.cloudflare.com (2803:f800:50::6ca2:c367)2418144691

Checks

  • ✓ Serial 2418144691 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 rihana.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 2418144691 is a Unix timestamp (2046-08-17 18:51 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

34 records at the apex

Found

Read from
173.245.58.244:53
TypeValueTTL
SOArihana.ns.cloudflare.com. dns.cloudflare.com. 2418144691 10000 2400 604800 18001800
NSrihana.ns.cloudflare.com.86400
NSroman.ns.cloudflare.com.86400
A104.18.20.98300
A104.18.21.98300
MX10 mail.koa.com.300
MX20 email.koa.com.300
TXT"0jqw8nx0195q5bfk0nn5p4q4mx4lld37"300
TXT"MS=ms44786306"300
TXT"_1horsf6me1gdwk1b7o8otrn6meaq4wh"300
TXT"_5f1n6s93zx38mkjyj73qote81lh3go7"300
TXT"_695ikd8ssbadec1gm747bp28d0qpu1e"300
TXT"_bcyob5qs7t19gqdrso8xp8250hpyzvj"300
TXT"_iywdr9njzs0z2ruies8hlce8xf4iizr"300
TXT"_jzteigtvt4lo481uw38hu71gd808qoz"300
TXT"_ood7i6yealekc739zpvkq6xnxl37eb4"300
TXT"_yx2q9bibtityrv7u9pzs794bqthu37w"300
TXT"ahrefs-site-verification_7d8b794a1112185b79ee2c0957f766ae2d08ff39d2b0adef7de632734dcb9eb7"300
TXT"apple-domain-verification=DweoQvDn9ifClhnl65Ee0bWOnTVax6_5P4-ijXWffv0"300
TXT"facebook-domain-verification=f5aztbtnv7o72ifp0u9j22jqbf0ikd"300
TXT"google-site-verification=BlZBrYvtm1gE9hP9VF1EO_sJSH2zS-oWA7faYOsw864"300
TXT"google-site-verification=LpLEPXIcPK4_SxPGtUKPJ_6jnhqfzthQf3uviw2FH54"300
TXT"google-site-verification=dF0i56y0jQqHjzd7mI-O_XMYU-Kk9M0Vmhf4XUZ6pTo"300
TXT"google-site-verification=pAnaBDCNlZW-7uNBptDoL_wsa8D5dsDDV-tjAY9waTs"300
TXT"k5f68o0q3pjuv2l3483lbhuoos"300
TXT"linkedin-site-verification=7dd1bf13-89e1-4ec7-9c59-1cae41140b42"300
TXT"pgt5fkaipemdl0rjhkcu4q8k23"300
TXT"qdh8wxwbg1wwdmmy30hf2v2ck4dhm55x"300
TXT"rq273f2dvklddzhfbyqd5x7zmf87qh2w"300
TXT"v=spf1 a mx ip4:206.127.76.0/24 ip4:206.127.97.0/24 include:mktomail.com include:servers.mcsv.net -all"300
TXT"vqhkbcjkhjrkeoc9nasboddq12"300
TXT"wpe-verification=koacampgrounds"300
TXT"wpe-verification=koarvservice"300
TXT"wrl9w2z51xn82rw9hlpm4c6zl2mt6260"300

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