tvguide.com

Checked 22 October 2026, 11:13 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · Tucows Domains Inc. · expires 2026-12-05

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Tucows Domains Inc.
Registered
6 December 1994
Last changed
15 March 2024
Expires
5 December 2026
Status
client transfer prohibited, client update prohibited
Registry nameservers
ns-cloud-b1.googledomains.com, ns-cloud-b2.googledomains.com, ns-cloud-b3.googledomains.com, ns-cloud-b4.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 2026-12-05 #3
    The registration is valid until 2026-12-05 (43 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns-cloud-b1.googledomains.com, ns-cloud-b2.googledomains.com, ns-cloud-b3.googledomains.com, ns-cloud-b4.googledomains.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-cloud-b1.googledomains.com, ns-cloud-b2.googledomains.com, ns-cloud-b3.googledomains.com, ns-cloud-b4.googledomains.com
NS in the zone
ns-cloud-b1.googledomains.com, ns-cloud-b2.googledomains.com, ns-cloud-b3.googledomains.com, ns-cloud-b4.googledomains.com
NameserverAddressesNetwork (AS)Glue
ns-cloud-b1.googledomains.com216.239.32.107 2001:4860:4802:32::6bAS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US2001:4860:4802:32::6b 216.239.32.107
ns-cloud-b2.googledomains.com216.239.34.107 2001:4860:4802:34::6bAS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US2001:4860:4802:34::6b 216.239.34.107
ns-cloud-b3.googledomains.com216.239.36.107 2001:4860:4802:36::6bAS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US2001:4860:4802:36::6b 216.239.36.107
ns-cloud-b4.googledomains.com216.239.38.107 2001:4860:4802:38::6bAS15169 GOOGLE - Google LLC, US AS15169 GOOGLE - Google LLC, US2001:4860:4802:38::6b 216.239.38.107

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-cloud-b1.googledomains.com, ns-cloud-b2.googledomains.com, ns-cloud-b3.googledomains.com, ns-cloud-b4.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-b1.googledomains.com 216.239.32.107NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns-cloud-b1.googledomains.com 2001:4860:4802:32::6bNOERROR, 12 ms, authoritativenoyes / yesrefused-
ns-cloud-b2.googledomains.com 216.239.34.107NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns-cloud-b2.googledomains.com 2001:4860:4802:34::6bNOERROR, 11 ms, authoritativenoyes / yesrefused-
ns-cloud-b3.googledomains.com 216.239.36.107NOERROR, 41 ms, authoritativenoyes / yesrefused-
ns-cloud-b3.googledomains.com 2001:4860:4802:36::6bNOERROR, 42 ms, authoritativenoyes / yesrefused-
ns-cloud-b4.googledomains.com 216.239.38.107NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns-cloud-b4.googledomains.com 2001:4860:4802:38::6bNOERROR, 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 1 · primary ns-cloud-b1.googledomains.com

Found

Primary (MNAME)
ns-cloud-b1.googledomains.com
Contact (RNAME)
cloud-dns-hostmaster.google.com
Serial
1
Refresh / retry
21600 s / 3600 s
Expire
259200 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns-cloud-b1.googledomains.com (216.239.32.107)1
ns-cloud-b1.googledomains.com (2001:4860:4802:32::6b)1
ns-cloud-b2.googledomains.com (216.239.34.107)1
ns-cloud-b2.googledomains.com (2001:4860:4802:34::6b)1
ns-cloud-b3.googledomains.com (216.239.36.107)1
ns-cloud-b3.googledomains.com (2001:4860:4802:36::6b)1
ns-cloud-b4.googledomains.com (216.239.38.107)1
ns-cloud-b4.googledomains.com (2001:4860:4802:38::6b)1

Checks

  • ✓ Serial 1 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-b1.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 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

info

26 records at the apex

Found

Read from
216.239.32.107:53
TypeValueTTL
SOAns-cloud-b1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 30021600
NSns-cloud-b1.googledomains.com.21600
NSns-cloud-b2.googledomains.com.21600
NSns-cloud-b4.googledomains.com.21600
NSns-cloud-b3.googledomains.com.21600
A162.159.142.170300
A172.66.2.166300
MX5 alt1.aspmx.l.google.com.300
MX1 aspmx.l.google.com.300
MX10 alt4.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
MX10 alt3.aspmx.l.google.com.300
TXT"google-site-verification=zqOvngPXqAS3lvj8iiyDoEsLjRD_eSYLLlJwALDHH2o"300
TXT"adobe-idp-site-verification=b6e27597198dfc9921fbe2ad78e9a76012bb17d0ddb65389e600ecb80de9a555"300
TXT"kteuempnms0vfnnnsterg0fkct"300
TXT"google-site-verification=56xCnFDcH7xP42JYqS_Mo1iC8EqqaTx0BRodu2fFtTs"300
TXT"google-site-verification=y15HzFljUHHqZCCeqqg5Vn6nq2CJ_0j0U8Rey3tMEBg"300
TXT"knowbe4-site-verification=f250b2a70f1bef3a0d3e9e990a25ada0"300
TXT"facebook-domain-verification=pv9v3zyvnjaaeg5j8pl9t2wu5ol99g"300
TXT"google-site-verification=epQWJS0KN33bw7H18xPeDv3hk1NPyZUZelAvRsZS33o"300
TXT"_globalsign-domain-verification=SQONiBgTxRVzPPtIHjei_IUGCiAa0KxoVWFw1QfVes"300
TXT"BSI191135850612"300
TXT"MS=ms69725510"300
TXT"v=spf1 include:spf.mandrillapp.com include:_spf.google.com include:spf-00262c01.pphosted.com include:spf.protection.outlook.com ~all"300
TXT"google-site-verification=a_7LPLqs2LW00IwmVfs142XdgNajKLTueKgFDkXFZrM"300
TXT"_globalsign-domain-verification=fhynwd09xzscvxrpykf7yhhb3n9h1whv"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, 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.
  • 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