messefrankfurt.com

Checked 22 October 2026, 09:50 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · InterNetX GmbH · expires 2027-06-14

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
InterNetX GmbH
Registered
15 June 1995
Last changed
15 June 2026
Expires
14 June 2027
Status
client transfer prohibited
Registry nameservers
ns.messefrankfurt.com, ns5.messefrankfurt.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 2027-06-14 #3
    The registration is valid until 2027-06-14 (234 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

ns.messefrankfurt.com, ns5.messefrankfurt.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns.messefrankfurt.com, ns5.messefrankfurt.com
NS in the zone
ns.messefrankfurt.com, ns5.messefrankfurt.com
NameserverAddressesNetwork (AS)Glue
ns.messefrankfurt.com193.109.4.5AS20740 MESSEFFM - Messe Frankfurt GmbH, DE193.109.4.5
ns5.messefrankfurt.com193.102.59.190AS20740 MESSEFFM - Messe Frankfurt GmbH, DE193.102.59.190

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.messefrankfurt.com, ns5.messefrankfurt.com.
    #6
  • ✓ 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: ns.messefrankfurt.com, ns5.messefrankfurt.com.
  • ✓ 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 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS20740 (MESSEFFM - Messe Frankfurt GmbH, DE): 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 .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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.messefrankfurt.com 193.109.4.5NOERROR, 6 ms, authoritativenoyes / yesrefused-
ns5.messefrankfurt.com 193.102.59.190NOERROR, 5 ms, authoritativenoyes / yesrefused-

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.
  • ✓ 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 2821357731 · primary ns.messefrankfurt.com

Found

Primary (MNAME)
ns.messefrankfurt.com
Contact (RNAME)
dnsadm.messefrankfurt.com
Serial
2821357731
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns.messefrankfurt.com (193.109.4.5)2821357731
ns5.messefrankfurt.com (193.102.59.190)2821357731

Checks

  • ✓ Serial 2821357731 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.messefrankfurt.com is one of the listed nameservers.
  • ✓ Contact dnsadm@messefrankfurt.com #25
    The SOA RNAME dnsadm.messefrankfurt.com means dnsadm@messefrankfurt.com.
  • ✓ Timestamp serial #26
    The serial 2821357731 is a Unix timestamp (2059-05-28 14:28 UTC).

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

12 records at the apex

Found

Read from
193.109.4.5:53
TypeValueTTL
SOAns.messefrankfurt.com. dnsadm.messefrankfurt.com. 2821357731 10800 3600 604800 90028800
NSns5.messefrankfurt.com.28800
NSns.messefrankfurt.com.28800
A193.109.4.3728800
MX10 mx01.messefrankfurt.com.28800
MX10 mx02.messefrankfurt.com.28800
TXT"openai-domain-verification=dv-10ZBC4Ng2DfPJXwdhlpgopPB"28800
TXT"v=spf1 mx ip4:193.109.4.0/24 ip4:193.109.7.192/26 -all"28800
TXT"MS=ms53145311"28800
TXT"MS=5BE08F96ABDA6D828209B727D2E7A80830FBD331"28800
TXT"ZA=7PZ64ph/GQ1W4djnpQtTlzcdN33usSAkgZRPTaLHGzU="28800
TXT"cisco-ci-domain-verification=6a597d4c8d28ec4ed5471d39d5e323ec15079f0fe7e455928ee4ac71269de393"28800

Checks

  • ✓ TTLs within range #32
    TTLs: A 8h, MX 8h, NS 8h. The NS TTL at the parent is 2d and in the zone 8h; 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