vttresearch.com

Checked 22 October 2026, 11:23 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 5 info

Registration

info

.com generic · Abion AB · expires 2027-06-01

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Abion AB
Registered
1 June 2011
Last changed
25 May 2026
Expires
1 June 2027
Status
client transfer prohibited
Registry nameservers
ns1.edelkey.net, ns2.edelkey.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 2027-06-01 #3
    The registration is valid until 2027-06-01 (221 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.edelkey.net, ns2.edelkey.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.edelkey.net, ns2.edelkey.net
NS in the zone
ns1.edelkey.net, ns2.edelkey.net
NameserverAddressesNetwork (AS)Glue
ns1.edelkey.net213.138.147.140 213.138.147.136AS1342 UNSPECIFIED - IDDQD-AS, EU AS1342 UNSPECIFIED - IDDQD-AS, EU-
ns2.edelkey.net213.138.147.137 213.138.147.141AS1342 UNSPECIFIED - IDDQD-AS, EU AS1342 UNSPECIFIED - IDDQD-AS, EU-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.edelkey.net, ns2.edelkey.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 213.138.147.0/24. 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 (AS1342 (UNSPECIFIED - IDDQD-AS, EU): 4 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

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.edelkey.net 213.138.147.140NOERROR, 25 ms, authoritativenoyes / yesrefused-
ns1.edelkey.net 213.138.147.136NOERROR, 25 ms, authoritativenoyes / yesrefused-
ns2.edelkey.net 213.138.147.137NOERROR, 27 ms, authoritativenoyes / yesrefused-
ns2.edelkey.net 213.138.147.141NOERROR, 27 ms, authoritativenoyes / yesrefused-

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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2025081501 · primary ns1.edelkey.net

Found

Primary (MNAME)
ns1.edelkey.net
Contact (RNAME)
hostmaster.fi.fujitsu.com
Serial
2025081501
Refresh / retry
1800 s / 900 s
Expire
1209600 s
Negative TTL
7200 s

Serial per nameserver

NameserverSerial
ns1.edelkey.net (213.138.147.140)2025081501
ns1.edelkey.net (213.138.147.136)2025081501
ns2.edelkey.net (213.138.147.137)2025081501
ns2.edelkey.net (213.138.147.141)2025081501

Checks

  • ✓ Serial 2025081501 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 30m, retry 15m, expire 14d, negative TTL 2h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.edelkey.net is one of the listed nameservers.
  • ✓ Contact hostmaster@fi.fujitsu.com #25
    The SOA RNAME hostmaster.fi.fujitsu.com means hostmaster@fi.fujitsu.com.
  • ✓ Date-based serial #26
    The serial 2025081501 follows the YYYYMMDDnn convention (2025-08-15).

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
213.138.147.140:53
TypeValueTTL
SOAns1.edelkey.net. hostmaster.fi.fujitsu.com. 2025081501 1800 900 1209600 72003600
NSns1.edelkey.net.3600
NSns2.edelkey.net.3600
A104.20.20.2023600
A172.66.172.433600
MX10 smtp2.edelkey.net.3600
MX10 smtp1.edelkey.net.3600
TXT"google-site-verification=Z3wHurArgoHt7PUdGjSORG70HIXv0OIzxGdzN0s9INQ"3600
TXT"MS=ms53902637"3600
TXT"v=spf1 include:spf1.edelkey.net include:spf.protection.outlook.com include:6799117.spf05.hubspotemail.net include:spf.mailjet.com " "ip4:130.188.126.90 ip4:188.165.241.192 ip4:94.237.86.182 ip4:37.59.50.128 -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