siliconrepublic.com

Checked 22 October 2026, 10:42 UTC · via 8.8.8.8
!Passed with warnings
22 passed 4 warnings 0 failed 5 info

Registration

info

.com generic · Tucows Domains Inc. · expires 2027-07-26

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Tucows Domains Inc.
Registered
26 July 2002
Last changed
27 June 2026
Expires
26 July 2027
Status
client transfer prohibited, client update prohibited
Registry nameservers
dns1.tibus.net, dns2.tibus.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 2027-07-26 #3
    The registration is valid until 2027-07-26 (277 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

dns1.tibus.net, dns2.tibus.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns1.tibus.net, dns2.tibus.net
NS in the zone
dns1.tibus.net, dns2.tibus.net
NameserverAddressesNetwork (AS)Glue
dns1.tibus.net212.108.94.4AS41678 TIBUS - The Internet Business Ltd, GB-
dns2.tibus.net212.108.94.12AS41678 TIBUS - The Internet Business Ltd, GB-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.tibus.net, dns2.tibus.net.
    #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 212.108.94.0/24. 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 (AS41678 (TIBUS - The Internet Business Ltd, GB): 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 .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
  • !
    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
dns1.tibus.net 212.108.94.4NOERROR, 17 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.5 (built May 7 2025 09:30:51 by root@localhost)
dns2.tibus.net 212.108.94.12NOERROR, 16 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.5 (built May 7 2025 09:30:51 by root@localhost)

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: dns1.tibus.net: "PowerDNS Authoritative Server 4.9.5 (built May 7 2025 09:30:51 by root@localhost)"; dns2.tibus.net: "PowerDNS Authoritative Server 4.9.5 (built May 7 2025 09:30:51 by root@localhost)". 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 2026080700 · primary dns1.tibus.net

Found

Primary (MNAME)
dns1.tibus.net
Contact (RNAME)
hostmaster.tibus.net
Serial
2026080700
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns1.tibus.net (212.108.94.4)2026080700
dns2.tibus.net (212.108.94.12)2026080700

Checks

  • ✓ Serial 2026080700 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.tibus.net is one of the listed nameservers.
  • ✓ Contact hostmaster@tibus.net #25
    The SOA RNAME hostmaster.tibus.net means hostmaster@tibus.net.
  • ✓ Date-based serial #26
    The serial 2026080700 follows the YYYYMMDDnn convention (2026-08-07).

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

13 records at the apex

Found

Read from
212.108.94.4:53
TypeValueTTL
SOAdns1.tibus.net. hostmaster.tibus.net. 2026080700 28800 7200 604800 8640086400
NSdns1.tibus.net.86400
NSdns2.tibus.net.86400
A89.185.147.27600
MX0 siliconrepublic-com.mail.eo.outlook.com.3600
MX10 ms21053663.msv1.invalid.outlook.com.3600
TXT"google-site-verification=ErrggWRE91VWuEyy4ue0J8FXK1gsxvyANtO0zIQ6TZ4"86400
TXT"bp2cvb11g61qnnrys1kmv4951fzpnpxl"86400
TXT"google-site-verification=fdDb5NtYDqTBktW29TmGaHReOG5vcdmpBQh_yiy1r1E"86400
TXT"d91klygsllmsk7q1yxw0j1r8tx1bjk0v"86400
TXT"google-site-verification=xdAUqGBVUVKD_2JJD1PxolV-shXI16uWGcIO9jFc87c"86400
TXT"linkedin-site-verification=d1694973-22ff-4f46-b7e7-a1aa43bf580e"86400
TXT"anthropic-domain-verification-72z9r5=5i9bWr1jZIefHlt7jFBcJ8eak"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 1h, 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