kobo.com

Checked 22 October 2026, 09:32 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · Network Solutions, LLC · expires 2030-12-04

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Network Solutions, LLC
Registered
5 December 1996
Last changed
5 October 2025
Expires
4 December 2030
Status
client transfer prohibited
Registry nameservers
ns-cloud-e1.googledomains.com, ns-cloud-e2.googledomains.com, ns-cloud-e3.googledomains.com, ns-cloud-e4.googledomains.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 2030-12-04 #3
    The registration is valid until 2030-12-04 (1503 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-cloud-e1.googledomains.com, ns-cloud-e2.googledomains.com, ns-cloud-e3.googledomains.com, ns-cloud-e4.googledomains.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-cloud-e1.googledomains.com, ns-cloud-e2.googledomains.com, ns-cloud-e3.googledomains.com, ns-cloud-e4.googledomains.com
NS in the zone
ns-cloud-e1.googledomains.com, ns-cloud-e2.googledomains.com, ns-cloud-e3.googledomains.com, ns-cloud-e4.googledomains.com
NameserverAddressesNetwork (AS)Glue
ns-cloud-e1.googledomains.com216.239.32.110 2001:4860:4802:32::6eAS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US2001:4860:4802:32::6e 216.239.32.110
ns-cloud-e2.googledomains.com216.239.34.110 2001:4860:4802:34::6eAS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US2001:4860:4802:34::6e 216.239.34.110
ns-cloud-e3.googledomains.com216.239.36.110 2001:4860:4802:36::6eAS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US2001:4860:4802:36::6e 216.239.36.110
ns-cloud-e4.googledomains.com216.239.38.110 2001:4860:4802:38::6eAS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US2001:4860:4802:38::6e 216.239.38.110

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-cloud-e1.googledomains.com, ns-cloud-e2.googledomains.com, ns-cloud-e3.googledomains.com, ns-cloud-e4.googledomains.com.
  • ✓ 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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:4860:4802::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS15169 (GOOGLE - Google LLC, 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
  • 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

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-cloud-e1.googledomains.com 216.239.32.110NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns-cloud-e1.googledomains.com 2001:4860:4802:32::6eNOERROR, 12 ms, authoritativenoyes / yesrefused-
ns-cloud-e2.googledomains.com 216.239.34.110NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns-cloud-e2.googledomains.com 2001:4860:4802:34::6eNOERROR, 12 ms, authoritativenoyes / yesrefused-
ns-cloud-e3.googledomains.com 216.239.36.110NOERROR, 41 ms, authoritativenoyes / yesrefused-
ns-cloud-e3.googledomains.com 2001:4860:4802:36::6eNOERROR, 42 ms, authoritativenoyes / yesrefused-
ns-cloud-e4.googledomains.com 216.239.38.110NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns-cloud-e4.googledomains.com 2001:4860:4802:38::6eNOERROR, 12 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 3 · primary ns-cloud-e1.googledomains.com

Found

Primary (MNAME)
ns-cloud-e1.googledomains.com
Contact (RNAME)
cloud-dns-hostmaster.google.com
Serial
3
Refresh / retry
21600 s / 3600 s
Expire
259200 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns-cloud-e1.googledomains.com (216.239.32.110)3
ns-cloud-e1.googledomains.com (2001:4860:4802:32::6e)3
ns-cloud-e2.googledomains.com (216.239.34.110)3
ns-cloud-e2.googledomains.com (2001:4860:4802:34::6e)3
ns-cloud-e3.googledomains.com (216.239.36.110)3
ns-cloud-e3.googledomains.com (2001:4860:4802:36::6e)3
ns-cloud-e4.googledomains.com (216.239.38.110)3
ns-cloud-e4.googledomains.com (2001:4860:4802:38::6e)3

Checks

  • ✓ Serial 3 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    expire 3d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 6h, retry 1h, expire 3d, negative TTL 5m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-cloud-e1.googledomains.com is one of the listed nameservers.
  • ✓ Contact cloud-dns-hostmaster@google.com #25
    The SOA RNAME cloud-dns-hostmaster.google.com means cloud-dns-hostmaster@google.com.
  • ✓ Counter serial #26
    The serial 3 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

pass

27 records at the apex

Found

Read from
216.239.32.110:53
TypeValueTTL
SOAns-cloud-e1.googledomains.com. cloud-dns-hostmaster.google.com. 3 21600 3600 259200 30021600
NSns-cloud-e3.googledomains.com.21600
NSns-cloud-e1.googledomains.com.21600
NSns-cloud-e4.googledomains.com.21600
NSns-cloud-e2.googledomains.com.21600
A172.64.150.101300
A104.18.37.155300
MX5 kobo-com.mail.protection.outlook.com.86400
TXT"google-site-verification=fubvUR2vWX0-_N-3h9Q6fR9el0Vi-OPTf-ysDQ2alrU"300
TXT"google-site-verification=TPfQLJMxDmDJ7QLK1G7_9WKCyT33Zd4OKl8Y3xcVUmA"300
TXT"fastly-domain-delegation-fddelt00540045-10-22-25"300
TXT"google-site-verification=Q25CMQs0FyZeTBTcsd2e3pVmeINoplPPcC0OyZp-cYw"300
TXT"google-site-verification=3aKt7utuf138msKSFHlGaxHSWaUfmh7xexzcZNtlSN0"300
TXT"hj-ownership=fvkv30Fnyx78b9M"300
TXT"status-page-domain-verification=9t2wdqtpqygk"300
TXT"eI4nDhTkhHLFkVn2I0H86PYkbQzHr26YA6ndMom0SKIrZENOFNfL3EFFlWHcp+r4uBL1NDg63BxMrflvKQkl+w=="300
TXT"17c61b51fd3e47faa7bbb0cb888ecbb0"300
TXT"facebook-domain-verification=asza9zmotc5y3jf2vvxuox1fh4zwal"300
TXT"v=spf1 mx include:spf1.kobo.com include:spf.protection.outlook.com include:_spf.alchemer.eu include:stspg-customer.com include:_spf.mlsend.com include:shops.shopify.com include:mail.zendesk.com include:amazonses.com ~all"300
TXT"google-site-verification=SN46x048vtTZTeC4pcKIeVtbSbhp22YtkZIaMnlEWKY"300
TXT"google-site-verification=TMvqQdCrWZE_zq_PIvMaWObopFipEhVGM3-NQ1D5qfY"300
TXT"ca3-763497e7b6ed42dab28acd1f86e299cf"300
TXT"cloudflare_dashboard_sso=9953105deb781640ed8a6f7e927897bf"300
TXT"MS=ms57345456"300
CAA0 issuewild "letsencrypt.org"300
CAA0 issuewild "pki.goog"300
CAA0 issuewild "sectigo.com"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1d, NS 6h. The NS TTL at the parent is 2d and in the zone 6h; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org, pki.goog, sectigo.com.