tightvnc.com

Checked 22 October 2026, 11:05 UTC · via 8.8.8.8
!Passed with warnings
27 passed 1 warning 0 failed 3 info

Registration

info

.com generic · Gandi SAS · expires 2028-01-03

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Gandi SAS
Registered
3 January 2001
Last changed
24 December 2025
Expires
3 January 2028
Status
client transfer prohibited
Registry nameservers
a.dns.gandi.net, b.dns.gandi.net, c.dns.gandi.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 2028-01-03 #3
    The registration is valid until 2028-01-03 (437 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

a.dns.gandi.net, b.dns.gandi.net, c.dns.gandi.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a.dns.gandi.net, b.dns.gandi.net, c.dns.gandi.net
NS in the zone
a.dns.gandi.net, b.dns.gandi.net, c.dns.gandi.net
NameserverAddressesNetwork (AS)Glue
a.dns.gandi.net173.246.98.1 2604:3400:abca::1AS29169 GANDI-AS - GANDI SAS, FR AS209453 GANDI-LIVEDNS - GANDI SAS, FR-
b.dns.gandi.net213.167.229.1 2001:4b98:abcb::1AS209453 GANDI-LIVEDNS - GANDI SAS, FR AS209453 GANDI-LIVEDNS - GANDI SAS, FR-
c.dns.gandi.net217.70.179.1 2604:3400:abcc::1AS209453 GANDI-LIVEDNS - GANDI SAS, FR AS209453 GANDI-LIVEDNS - GANDI SAS, FR-

Checks

  • ✓ 3 nameservers #6
    Delegated to a.dns.gandi.net, b.dns.gandi.net, c.dns.gandi.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 3 IPv4 /24s and 3 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS209453 (GANDI-LIVEDNS - GANDI SAS, FR): 5 addresses; AS29169 (GANDI-AS - GANDI SAS, FR): 1 address.
  • i
    All nameserver names under .net
    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

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a.dns.gandi.net 173.246.98.1NOERROR, 19 ms, authoritativenoyes / yesrefused-
a.dns.gandi.net 2604:3400:abca::1NOERROR, 25 ms, authoritativenoyes / yesrefused-
b.dns.gandi.net 213.167.229.1NOERROR, 22 ms, authoritativenoyes / yesrefused-
b.dns.gandi.net 2001:4b98:abcb::1NOERROR, 21 ms, authoritativenoyes / yesrefused-
c.dns.gandi.net 217.70.179.1NOERROR, 19 ms, authoritativenoyes / yesrefused-
c.dns.gandi.net 2604:3400:abcc::1NOERROR, 21 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 6 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

pass

serial 1787827363 · primary a.dns.gandi.net

Found

Primary (MNAME)
a.dns.gandi.net
Contact (RNAME)
hostmaster.gandi.net
Serial
1787827363
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
10800 s

Serial per nameserver

NameserverSerial
a.dns.gandi.net (173.246.98.1)1787827363
a.dns.gandi.net (2604:3400:abca::1)1787827363
b.dns.gandi.net (213.167.229.1)1787827363
b.dns.gandi.net (2001:4b98:abcb::1)1787827363
c.dns.gandi.net (217.70.179.1)1787827363
c.dns.gandi.net (2604:3400:abcc::1)1787827363

Checks

  • ✓ Serial 1787827363 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 3h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a.dns.gandi.net is one of the listed nameservers.
  • ✓ Contact hostmaster@gandi.net #25
    The SOA RNAME hostmaster.gandi.net means hostmaster@gandi.net.
  • ✓ Timestamp serial #26
    The serial 1787827363 is a Unix timestamp (2026-08-27 10:42 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

8 records at the apex

Found

Read from
173.246.98.1:53
TypeValueTTL
SOAa.dns.gandi.net. hostmaster.gandi.net. 1787827363 10800 3600 604800 1080010800
NSa.dns.gandi.net.10800
NSb.dns.gandi.net.10800
NSc.dns.gandi.net.10800
A178.57.221.943600
MX10 mx.yandex.net.3600
TXT"google-site-verification=vh24RIMPNr4kY6GSnUENlpyrXbniWBExPvET9ToRxYU"3600
TXT"v=spf1 redirect=_spf.yandex.net"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 3h. The NS TTL at the parent is 2d and in the zone 3h; 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