kahoot.com

Checked 22 October 2026, 09:30 UTC · via 8.8.8.8
!Passed with warnings
25 passed 3 warnings 0 failed 3 info

Registration

info

.com generic · EuroDNS S.A. · expires 2027-08-31

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
EuroDNS S.A.
Registered
1 September 1998
Last changed
25 August 2026
Expires
31 August 2027
Status
client transfer prohibited
Registry nameservers
ns-1127.awsdns-12.org, ns-2025.awsdns-61.co.uk, ns-452.awsdns-56.com, ns-523.awsdns-01.net
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 2027-08-31 #3
    The registration is valid until 2027-08-31 (312 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

ns-1127.awsdns-12.org, ns-2025.awsdns-61.co.uk, ns-452.awsdns-56.com, ns-523.awsdns-01.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1127.awsdns-12.org, ns-2025.awsdns-61.co.uk, ns-452.awsdns-56.com, ns-523.awsdns-01.net
NS in the zone
ns-1127.awsdns-12.org, ns-2025.awsdns-61.co.uk, ns-452.awsdns-56.com, ns-523.awsdns-01.net
NameserverAddressesNetwork (AS)Glue
ns-1127.awsdns-12.org205.251.196.103 2600:9000:5304:6700::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-2025.awsdns-61.co.uk205.251.199.233 2600:9000:5307:e900::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-452.awsdns-56.com205.251.193.196 2600:9000:5301:c400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.196 2600:9000:5301:c400::1
ns-523.awsdns-01.net205.251.194.11 2600:9000:5302:b00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1127.awsdns-12.org, ns-2025.awsdns-61.co.uk, ns-452.awsdns-56.com, ns-523.awsdns-01.net.
  • ✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1127.awsdns-12.org 205.251.196.103NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1127.awsdns-12.org 2600:9000:5304:6700::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-2025.awsdns-61.co.uk 205.251.199.233NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-2025.awsdns-61.co.uk 2600:9000:5307:e900::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-452.awsdns-56.com 205.251.193.196NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-452.awsdns-56.com 2600:9000:5301:c400::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-523.awsdns-01.net 205.251.194.11NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-523.awsdns-01.net 2600:9000:5302:b00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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

warn

serial 1 · primary ns-1127.awsdns-12.org

Found

Primary (MNAME)
ns-1127.awsdns-12.org
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
60 s

Serial per nameserver

NameserverSerial
ns-1127.awsdns-12.org (205.251.196.103)1
ns-1127.awsdns-12.org (2600:9000:5304:6700::1)1
ns-2025.awsdns-61.co.uk (205.251.199.233)1
ns-2025.awsdns-61.co.uk (2600:9000:5307:e900::1)1
ns-452.awsdns-56.com (205.251.193.196)1
ns-452.awsdns-56.com (2600:9000:5301:c400::1)1
ns-523.awsdns-01.net (205.251.194.11)1
ns-523.awsdns-01.net (2600:9000:5302:b00::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 1m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 2h, retry 15m, expire 14d, negative TTL 1m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-1127.awsdns-12.org is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Counter serial #26
    The serial 1 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

warn

39 records at the apex

Found

Read from
205.251.196.103:53
TypeValueTTL
SOAns-1127.awsdns-12.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 60900
NSns-1127.awsdns-12.org.172800
NSns-2025.awsdns-61.co.uk.172800
NSns-452.awsdns-56.com.172800
NSns-523.awsdns-01.net.172800
A143.204.181.9260
A143.204.181.9860
A143.204.181.12560
A143.204.181.3160
MX10 aspmx.l.google.com.60
MX20 alt1.aspmx.l.google.com.60
MX20 alt2.aspmx.l.google.com.60
MX30 aspmx2.googlemail.com.60
MX30 aspmx3.googlemail.com.60
TXT"MS=ms47760077"60
TXT"_globalsign-domain-verification=Uh1rGqRNS5YGKekXD0UQ5H03CvQpc4flpbC7wFkhiH"60
TXT"anthropic-domain-verification-m4gsdq=lbQcUjW1cZT4FdPQQB3liI0GX"60
TXT"apple-domain-verification=YB0sOFNWXDwLZh7Z"60
TXT"asv=aa81f62dc13a83fba5d7aa030a0eb8f4"60
TXT"atlassian-domain-verification=IabpAuh6twfL8mKrJIHWSBVbbuY7Pt/RiNDZk7R4nEjHm7Q979/B1q4nLsrg4vNp"60
TXT"atlassian-sending-domain-verification=ddc74541-d0ab-4883-b683-f81565503f6a"60
TXT"bw=yW0Y+BJTS2bnjni8Mgwo2RHRIfuOVYJn5PDTPT0rNQ5Q"60
TXT"canva-site-verification=FNu28j-6UhvPS7YiRC0GJg"60
TXT"cursor-domain-verification-hw4f4j=1x9LR3eFgxiwXIBEHl06SXxnr"60
TXT"docusign=596e4696-5951-4fe6-9ce5-8e1b76f1a18f"60
TXT"gc-ai-domain-verification-48vw4m=XhCNAKZyqWkTaa6PDNsCJ0Mid"60
TXT"google-site-verification=8IlGmgfGvaqbRQJCBfzVDfR5Cd-8ravBmMUwciD495g"60
TXT"google-site-verification=LOYcXP4dgeYY6NzGXyBLz3-iwADOH6HJYpDPyoUgQxc"60
TXT"google-site-verification=WUwZu3FPWaPUFVh5v5gptQXhrt2wqWt3fx9WR3HUagQ"60
TXT"google-site-verification=_o859ygfiPVMPsp6PYtyLTYimff_t3fqEDFEkEuoHFk"60
TXT"jamf-site-verification=SC1NCi0CxcbUZGmpWMrMzw"60
TXT"miro-verification=b421256ae9d95e4336a57c1376529b3e4080132d"60
TXT"notion-domain-verification=XJScnrzvs1Ez9PXCV21XAdz6gwAR7a4zeHHOgzJYubv"60
TXT"openai-domain-verification=dv-rZ8q2W6CXwaF7pGVQMmci0Lp"60
TXT"perplexity-ai-domain-verification-76b1mb=0Z4otWJH6wM6xanNLyPgrHlyt"60
TXT"status-page-domain-verification=6cs7ch0ddhg6"60
TXT"token.twilio-domain-verification=d3569776c470d4749a387b81be79cbd8"60
TXT"v=spf1 include:_spf.google.com include:4739183.spf02.hubspotemail.net include:sendgrid.net include:shops.shopify.com include:mail.zendesk.com include:_spf.tripletex.no -all"60
TXT"zapier-domain-verification-challenge=3c169717-b402-4906-b061-d2ec01935ac1"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (1m). Low TTLs are useful just before a planned change.
    #32
  • ✓ 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