tinypng.com

Checked 22 October 2026, 11:10 UTC · via 8.8.8.8
!Passed with warnings
27 passed 3 warnings 0 failed 4 info

Registration

info

.com generic · Key-Systems GmbH · expires 2027-05-27

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Key-Systems GmbH
Registered
27 May 2011
Last changed
27 May 2026
Expires
27 May 2027
Status
client transfer 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 2027-05-27 #3
    The registration is valid until 2027-05-27 (216 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-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, 12 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, 11 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, 43 ms, authoritativenoyes / yesrefused-
ns-cloud-b4.googledomains.com 216.239.38.107NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns-cloud-b4.googledomains.com 2001:4860:4802:38::6bNOERROR, 11 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

Signed, but no DS at parent

Found

Validated by resolver
no
Denial of existence
NSEC3
NSEC3
1 iterations, 8-byte salt
Signatures valid until
11 November 2026

DNSKEY in the zone

Key tagRoleAlgorithm
54365KSK (257)RSASHA256 (8)
4653ZSK (256)RSASHA256 (8)

Checks

  • !
    Signed but not delegated securely
    The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.
    #27
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Signatures valid until 2026-11-11 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-11 16:02 UTC.
  • !
    NSEC3 with extra iterations or salt
    NSEC3 uses 1 iteration and a 8-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Records

pass

17 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-b3.googledomains.com.21600
NSns-cloud-b1.googledomains.com.21600
NSns-cloud-b4.googledomains.com.21600
NSns-cloud-b2.googledomains.com.21600
A35.190.0.2513600
MX20 alt2.aspmx.l.google.com.86400
MX20 alt1.aspmx.l.google.com.86400
MX30 aspmx3.googlemail.com.86400
MX30 aspmx2.googlemail.com.86400
MX10 aspmx.l.google.com.86400
TXT"pinterest-site-verification=708f901a3faae82d0c0656b0b7d9c742"300
TXT"google-site-verification=yZz9jEGdhNKb95-JP4QNtRcUXRMmKx2XsAv7nj4KGCM"300
TXT"ahrefs-site-verification_07bcbe3212480b873818c611451108f3c3c6d2f1f9c629836b5574a508051491"300
TXT"google-site-verification=9Eu5X92t1z5fICydi9qtKLzyuV-N9zicFyxqGlkGunQ"300
TXT"v=spf1 -all"300
CAA128 issue "letsencrypt.org"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, 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.