thefwa.com

Checked 22 October 2026, 11:02 UTC · via 8.8.8.8
!Passed with warnings
25 passed 1 warning 0 failed 5 info

Registration

info

.com generic · IONOS SE · expires 2026-12-31

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
IONOS SE
Registered
31 December 2004
Last changed
1 January 2026
Expires
31 December 2026
Status
client transfer prohibited
Registry nameservers
adns1.rackfish.net, adns2.rackfish.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 2026-12-31 #3
    The registration is valid until 2026-12-31 (70 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

adns1.rackfish.net, adns2.rackfish.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
adns1.rackfish.net, adns2.rackfish.net
NS in the zone
adns1.rackfish.net, adns2.rackfish.net
NameserverAddressesNetwork (AS)Glue
adns1.rackfish.net162.219.54.139 2620:10a:80eb::4bAS55195 CIRA-CLOUD1 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA AS55195 CIRA-CLOUD1 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA-
adns2.rackfish.net162.219.55.139 2620:10a:80ec::4bAS394354 CIRA-CLOUD2 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA AS394354 CIRA-CLOUD2 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: adns1.rackfish.net, adns2.rackfish.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 different networks #10
    The nameservers are spread over 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS394354 (CIRA-CLOUD2 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA): 2 addresses; AS55195 (CIRA-CLOUD1 - CIRA Canadian Internet Registration Authority Autorit Canadienne pour les enregistrements Internet, CA): 2 addresses.
  • 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

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
adns1.rackfish.net 162.219.54.139NOERROR, 16 ms, authoritativenoyes / yesrefusedCDG D-ZONE nameserver
adns1.rackfish.net 2620:10a:80eb::4bNOERROR, 16 ms, authoritativenoyes / yesrefusedLHR D-ZONE nameserver
adns2.rackfish.net 162.219.55.139NOERROR, 3 ms, authoritativenoyes / yesrefusedCIRA Server
adns2.rackfish.net 2620:10a:80ec::4bNOERROR, 4 ms, authoritativenoyes / yesrefusedFRA D-ZONE nameserver

Checks

  • ✓ All respond #14
    All 4 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: adns1.rackfish.net: "CDG D-ZONE nameserver"; adns1.rackfish.net: "LHR D-ZONE nameserver"; adns2.rackfish.net: "CIRA Server"; adns2.rackfish.net: "FRA D-ZONE nameserver".
    #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 2026102201 · primary adns1.rackfish.net

Found

Primary (MNAME)
adns1.rackfish.net
Contact (RNAME)
registry.rackfish.net
Serial
2026102201
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
adns1.rackfish.net (162.219.54.139)2026102201
adns1.rackfish.net (2620:10a:80eb::4b)2026102201
adns2.rackfish.net (162.219.55.139)2026102201
adns2.rackfish.net (2620:10a:80ec::4b)2026102201

Checks

  • ✓ Serial 2026102201 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 adns1.rackfish.net is one of the listed nameservers.
  • ✓ Contact registry@rackfish.net #25
    The SOA RNAME registry.rackfish.net means registry@rackfish.net.
  • ✓ Date-based serial #26
    The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

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

11 records at the apex

Found

Read from
162.219.54.139:53
TypeValueTTL
SOAadns1.rackfish.net. registry.rackfish.net. 2026102201 28800 7200 604800 864003600
NSadns2.rackfish.net.3600
NSadns1.rackfish.net.3600
A193.169.164.1813600
MX10 aspmx.l.google.com.3600
MX20 alt1.aspmx.l.google.com.3600
MX30 alt2.aspmx.l.google.com.3600
MX40 alt3.aspmx.l.google.com.3600
MX50 alt4.aspmx.l.google.com.3600
TXT"mailerlite-domain-verification=97a6e53144c1c7235d06e9f8c1806be41e38c7fd"3600
TXT"v=spf1 include:_spf.mlsend.com include:spf.mandrillapp.com include:ems02.com include:_spf.google.com ~all"3600

Checks

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