istudiosg.com

Checked 22 October 2026, 09:22 UTC · via 8.8.8.8
!Passed with warnings
22 passed 4 warnings 0 failed 5 info

Registration

info

.com generic · Dreamscape Networks International Pte Ltd · expires 2027-05-13

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Dreamscape Networks International Pte Ltd
Registered
13 May 2015
Last changed
12 May 2026
Expires
13 May 2027
Status
client transfer prohibited
Registry nameservers
ns1.vzded116.smartservers.com.au, ns2.vzded116.smartservers.com.au
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 2027-05-13 #3
    The registration is valid until 2027-05-13 (203 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

warn

ns1.vzded116.smartservers.com.au, ns2.vzded116.smartservers.com.au

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.vzded116.smartservers.com.au, ns2.vzded116.smartservers.com.au
NS in the zone
ns1.vzded116.smartservers.com.au, ns2.vzded116.smartservers.com.au
NameserverAddressesNetwork (AS)Glue
ns1.vzded116.smartservers.com.au203.98.83.12AS55803 HOSTOPIA-AU - Hostopia Australia Web Pty Ltd, AU-
ns2.vzded116.smartservers.com.au203.98.83.12AS55803 HOSTOPIA-AU - Hostopia Australia Web Pty Ltd, AU-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.vzded116.smartservers.com.au, ns2.vzded116.smartservers.com.au.
    #6
  • ✓ 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 one network
    all IPv4 addresses are in 203.98.83.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS55803 (HOSTOPIA-AU - Hostopia Australia Web Pty Ltd, AU): 2 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 .au
    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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.vzded116.smartservers.com.au 203.98.83.12NOERROR, 271 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 5.1.4 (built Aug 10 2026 13:38:30 by root@bh-centos-8.dev.cpanel.net)
ns2.vzded116.smartservers.com.au 203.98.83.12NOERROR, 272 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 5.1.4 (built Aug 10 2026 13:38:30 by root@bh-centos-8.dev.cpanel.net)

Checks

  • ✓ All respond #14
    All 2 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.vzded116.smartservers.com.au: "PowerDNS Authoritative Server 5.1.4 (built Aug 10 2026 13:38:30 by root@bh-centos-8.dev.cpanel.net)"; ns2.vzded116.smartservers.com.au: "PowerDNS Authoritative Server 5.1.4 (built Aug 10 2026 13:38:30 by root@bh-centos-8.dev.cpanel.net)". Hide or replace the version string.
    #17
  • ✓ 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 2026101001 · primary ns1.vzded116.smartservers.com.au

Found

Primary (MNAME)
ns1.vzded116.smartservers.com.au
Contact (RNAME)
root.vzded116.smartservers.com.au
Serial
2026101001
Refresh / retry
3600 s / 1800 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.vzded116.smartservers.com.au (203.98.83.12)2026101001
ns2.vzded116.smartservers.com.au (203.98.83.12)2026101001

Checks

  • ✓ Serial 2026101001 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 30m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.vzded116.smartservers.com.au is one of the listed nameservers.
  • ✓ Contact root@vzded116.smartservers.com.au #25
    The SOA RNAME root.vzded116.smartservers.com.au means root@vzded116.smartservers.com.au.
  • ✓ Date-based serial #26
    The serial 2026101001 follows the YYYYMMDDnn convention (2026-10-10).

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
203.98.83.12:53
TypeValueTTL
SOAns1.vzded116.smartservers.com.au. root.vzded116.smartservers.com.au. 2026101001 3600 1800 1209600 8640086400
NSns1.vzded116.smartservers.com.au.86400
NSns2.vzded116.smartservers.com.au.86400
A23.227.38.6514400
MX0 mail.istudiosg.com.14400
TXT"google-site-verification=iXnEtq9K8W3uJaIkPFuikv9hA2oEo_Z9OJ27cVL0Vjk"3600
TXT"v=spf1 ip4:203.98.83.12 +a +mx +ip4:101.100.209.37 +ip4:101.100.209.86 -all"14400
TXT"MS=ms62424681"14400

Checks

  • ✓ TTLs within range #32
    TTLs: A 4h, MX 4h, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; 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