mattcutts.com

Checked 22 October 2026, 09:43 UTC · via 8.8.8.8
!Passed with warnings
25 passed 3 warnings 0 failed 3 info

Registration

info

.com generic · Gandi SAS · expires 2031-06-21

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Gandi SAS
Registered
21 June 2003
Last changed
28 October 2025
Expires
21 June 2031
Status
client transfer prohibited
Registry nameservers
ns1.tigertech.net, ns2.tigertech.biz
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 2031-06-21 #3
    The registration is valid until 2031-06-21 (1703 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.tigertech.net, ns2.tigertech.biz

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.tigertech.net, ns2.tigertech.biz
NS in the zone
ns1.tigertech.net, ns2.tigertech.biz, ns3.tigertech.org
NameserverAddressesNetwork (AS)Glue
ns1.tigertech.net208.80.4.61 208.80.4.71 2604:4f00::2:1:1:feed 2604:4f00::2:0:1:feedAS47002 TIGERTECH - Tiger Technologies LLC, US AS47002 TIGERTECH - Tiger Technologies LLC, US AS47002 TIGERTECH - Tiger Technologies LLC, US AS47002 TIGERTECH - Tiger Technologies LLC, US-
ns2.tigertech.biz170.39.131.62 2600:9000:a503:4dad:e2d6:f42c:8302:db6e 2600:9000:a618:a66b:3134:a332:b8c3:8d66AS47002 TIGERTECH - Tiger Technologies LLC, US AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns3.tigertech.org (zone only)74.114.91.73 74.114.91.63 2604:4f00:f00::3:feed 2604:4f00:f00::1:3:feedAS47002 TIGERTECH - Tiger Technologies LLC, US AS47002 TIGERTECH - Tiger Technologies LLC, US AS47002 TIGERTECH - Tiger Technologies LLC, US AS47002 TIGERTECH - Tiger Technologies LLC, US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.tigertech.net, ns2.tigertech.biz.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ns3.tigertech.org. ns1.tigertech.net, ns2.tigertech.biz, ns3.tigertech.org report NS ns1.tigertech.net ns2.tigertech.biz ns3.tigertech.org.
    #7
  • ✓ 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 4 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS16509 (AMAZON-02 - Amazon.com, Inc., US): 2 addresses; AS47002 (TIGERTECH - Tiger Technologies LLC, US): 9 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .biz, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

11 of 11 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.tigertech.net 208.80.4.61NOERROR, 148 ms, authoritativenoyes / yesrefused0
ns1.tigertech.net 208.80.4.71NOERROR, 151 ms, authoritativenoyes / yesrefused0
ns1.tigertech.net 2604:4f00::2:1:1:feedNOERROR, 171 ms, authoritativenoyes / yesrefused0
ns1.tigertech.net 2604:4f00::2:0:1:feedNOERROR, 175 ms, authoritativenoyes / yesrefused0
ns2.tigertech.biz 170.39.131.62NOERROR, 5 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.4.1
ns2.tigertech.biz 2600:9000:a503:4dad:e2d6:f42c:8302:db6eNOERROR, 6 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.4.1
ns2.tigertech.biz 2600:9000:a618:a66b:3134:a332:b8c3:8d66NOERROR, 6 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.4.1
ns3.tigertech.org 74.114.91.73NOERROR, 158 ms, authoritativenoyes / yesrefused0
ns3.tigertech.org 74.114.91.63NOERROR, 148 ms, authoritativenoyes / yesrefused0
ns3.tigertech.org 2604:4f00:f00::3:feedNOERROR, 177 ms, authoritativenoyes / yesrefused0
ns3.tigertech.org 2604:4f00:f00::1:3:feedNOERROR, 173 ms, authoritativenoyes / yesrefused0

Checks

  • ✓ All respond #14
    All 11 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: ns2.tigertech.biz: "PowerDNS Authoritative Server 4.4.1". 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 2026090703 · primary ns1.tigertech.net

Found

Primary (MNAME)
ns1.tigertech.net
Contact (RNAME)
support.tigertech.net
Serial
2026090703
Refresh / retry
7200 s / 1800 s
Expire
1209600 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns1.tigertech.net (208.80.4.61)2026090703
ns1.tigertech.net (208.80.4.71)2026090703
ns1.tigertech.net (2604:4f00::2:1:1:feed)2026090703
ns1.tigertech.net (2604:4f00::2:0:1:feed)2026090703
ns2.tigertech.biz (170.39.131.62)2026090703
ns2.tigertech.biz (2600:9000:a503:4dad:e2d6:f42c:8302:db6e)2026090703
ns2.tigertech.biz (2600:9000:a618:a66b:3134:a332:b8c3:8d66)2026090703
ns3.tigertech.org (74.114.91.73)2026090703
ns3.tigertech.org (74.114.91.63)2026090703
ns3.tigertech.org (2604:4f00:f00::3:feed)2026090703
ns3.tigertech.org (2604:4f00:f00::1:3:feed)2026090703

Checks

  • ✓ Serial 2026090703 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 30m, expire 14d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.tigertech.net is one of the listed nameservers.
  • ✓ Contact support@tigertech.net #25
    The SOA RNAME support.tigertech.net means support@tigertech.net.
  • ✓ Date-based serial #26
    The serial 2026090703 follows the YYYYMMDDnn convention (2026-09-07).

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

10 records at the apex

Found

Read from
208.80.4.61:53
TypeValueTTL
SOAns1.tigertech.net. support.tigertech.net. 2026090703 7200 1800 1209600 90043200
NSns1.tigertech.net.3600
NSns3.tigertech.org.3600
NSns2.tigertech.biz.3600
A208.80.6.35900
AAAA2604:4f00:10:5a30:0:23:88:1900
MX10 mx1.tigertech.net.1800
MX10 mx2.tigertech.net.1800
MX20 mx3.tigertech.net.1800
TXT"v=spf1 include:tigertech.net ~all"900

Checks

  • ✓ TTLs within range #32
    TTLs: A 15m, AAAA 15m, MX 30m, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; 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