islandnet.com

Checked 22 October 2026, 09:22 UTC · via 8.8.8.8
!Passed with warnings
20 passed 4 warnings 0 failed 7 info

Registration

info

.com generic · Tucows Domains Inc. · expires 2027-05-19

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Tucows Domains Inc.
Registered
18 May 1994
Last changed
20 April 2026
Expires
19 May 2027
Status
client transfer prohibited, client update prohibited
Registry nameservers
ns1.islandnet.com, ns2.islandnet.com, ns3.islandnet.com, ns4.islandnet.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 2027-05-19 #3
    The registration is valid until 2027-05-19 (208 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

warn

ns1.islandnet.com, ns2.islandnet.com, ns3.islandnet.com, ns4.islandnet.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.islandnet.com, ns2.islandnet.com, ns3.islandnet.com, ns4.islandnet.com
NS in the zone
ns1.islandnet.com, ns2.islandnet.com, ns3.islandnet.com, ns4.islandnet.com
NameserverAddressesNetwork (AS)Glue
ns1.islandnet.com104.236.161.191AS14061 DIGITALOCEAN-ASN - DigitalOcean, LLC, US104.236.161.191
ns2.islandnet.com(does not resolve)104.236.161.191
ns3.islandnet.com104.236.161.191AS14061 DIGITALOCEAN-ASN - DigitalOcean, LLC, US104.236.161.191
ns4.islandnet.com104.236.161.191AS14061 DIGITALOCEAN-ASN - DigitalOcean, LLC, US104.236.161.191

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.islandnet.com, ns2.islandnet.com, ns3.islandnet.com, ns4.islandnet.com.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns1.islandnet.com, ns2.islandnet.com, ns3.islandnet.com, ns4.islandnet.com.
  • i
    Could not be checked
    Resolving these nameserver names failed: ns2.islandnet.com (DNS query for ns2.islandnet.com returned SERVFAIL).
    #9
  • !
    Nameservers in one network
    all IPv4 addresses are in 104.236.161.0/24. 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 (AS14061 (DIGITALOCEAN-ASN - DigitalOcean, LLC, US): 3 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.islandnet.com, ns3.islandnet.com, ns4.islandnet.com.
    #13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.islandnet.com 104.236.161.191NOERROR, 161 ms, authoritativenoyes / norefused1.2.8.31
ns3.islandnet.com 104.236.161.191NOERROR, 160 ms, authoritativenoyes / norefused1.2.8.31
ns4.islandnet.com 104.236.161.191NOERROR, 160 ms, authoritativenoyes / norefused1.2.8.31

Checks

  • ✓ All respond #14
    All 3 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.islandnet.com: "1.2.8.31"; ns3.islandnet.com: "1.2.8.31"; ns4.islandnet.com: "1.2.8.31". 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.
  • !
    No EDNS
    These nameservers don't support EDNS(0), needed for DNSSEC and answers larger than 512 bytes: ns1.islandnet.com (104.236.161.191), ns3.islandnet.com (104.236.161.191), ns4.islandnet.com (104.236.161.191).
    #20
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2016051101 · primary ns1.islandnet.com

Found

Primary (MNAME)
ns1.islandnet.com
Contact (RNAME)
support.islandnet.com
Serial
2016051101
Refresh / retry
7200 s / 3600 s
Expire
1209600 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.islandnet.com (104.236.161.191)2016051101
ns3.islandnet.com (104.236.161.191)2016051101
ns4.islandnet.com (104.236.161.191)2016051101

Checks

  • ✓ Serial 2016051101 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 1h, expire 14d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.islandnet.com is one of the listed nameservers.
  • ✓ Contact support@islandnet.com #25
    The SOA RNAME support.islandnet.com means support@islandnet.com.
  • ✓ Date-based serial #26
    The serial 2016051101 follows the YYYYMMDDnn convention (2016-05-11).

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

9 records at the apex

Found

Read from
104.236.161.191:53
TypeValueTTL
SOAns1.islandnet.com. support.islandnet.com. 2016051101 7200 3600 1209600 3003600
NSns1.islandnet.com.300
NSns2.islandnet.com.300
NSns3.islandnet.com.300
NSns4.islandnet.com.300
A192.99.139.168300
MX10 mail.islandnet.com.300
TXT"google-site-verification=oZxcRrUoN-Aita_Ej5Dh1XIMLYTrInXAlycvnJO9adE"300
TXT"v=spf1 include:_spf.islandnet.com include:_spf.islandhosting.com ~all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 2d and in the zone 5m; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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