trivago.com

Checked 22 October 2026, 11:12 UTC · via 8.8.8.8
!Passed with warnings
24 passed 3 warnings 0 failed 4 info

Registration

info

.com generic · EuroDNS S.A. · expires 2027-02-18

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
EuroDNS S.A.
Registered
18 February 2004
Last changed
12 February 2026
Expires
18 February 2027
Status
client transfer prohibited
Registry nameservers
a1-92.akam.net, a11-67.akam.net, a2-67.akam.net, a22-64.akam.net, a24-64.akam.net, a5-66.akam.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 2027-02-18 #3
    The registration is valid until 2027-02-18 (119 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

a1-92.akam.net, a11-67.akam.net, a2-67.akam.net, a22-64.akam.net, a24-64.akam.net, a5-66.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-92.akam.net, a11-67.akam.net, a2-67.akam.net, a22-64.akam.net, a24-64.akam.net, a5-66.akam.net
NS in the zone
a1-92.akam.net, a11-67.akam.net, a2-67.akam.net, a22-64.akam.net, a24-64.akam.net, a5-66.akam.net
NameserverAddressesNetwork (AS)Glue
a1-92.akam.net193.108.91.92 2600:1401:2::5cAS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a11-67.akam.net84.53.139.67 2600:1480:1::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a2-67.akam.net95.100.174.67 2600:1480:7000::43AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a22-64.akam.net23.211.61.64 2600:1480:7800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a24-64.akam.net2.16.130.64 2600:1480:9800::40AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a5-66.akam.net95.100.168.66 2600:1480:b000::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-92.akam.net, a11-67.akam.net, a2-67.akam.net, a22-64.akam.net, a24-64.akam.net, a5-66.akam.net.
  • ✓ 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 6 IPv4 /24s and 6 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 12 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-92.akam.net 193.108.91.92NOERROR, 3 ms, authoritativenoyes / yesrefused41824.4
a1-92.akam.net 2600:1401:2::5cNOERROR, 3 ms, authoritativenoyes / yesrefused41824.10
a11-67.akam.net 84.53.139.67NOERROR, 3 ms, authoritativenoyes / yesrefused41824.9
a11-67.akam.net 2600:1480:1::43NOERROR, 4 ms, authoritativenoyes / yesrefused41824.4
a2-67.akam.net 95.100.174.67NOERROR, 3 ms, authoritativenoyes / yesrefused48878.30
a2-67.akam.net 2600:1480:7000::43NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a22-64.akam.net 23.211.61.64NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a22-64.akam.net 2600:1480:7800::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.27
a24-64.akam.net 2.16.130.64NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a24-64.akam.net 2600:1480:9800::40NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a5-66.akam.net 95.100.168.66NOERROR, 3 ms, authoritativenoyes / yesrefused41824.7
a5-66.akam.net 2600:1480:b000::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.9

Checks

  • ✓ All respond #14
    All 12 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: a1-92.akam.net: "41824.4"; a1-92.akam.net: "41824.10"; a11-67.akam.net: "41824.9"; a11-67.akam.net: "41824.4"; a2-67.akam.net: "48878.30"; a2-67.akam.net: "48878.31"; a22-64.akam.net: "48878.31"; a22-64.akam.net: "48878.27"; a24-64.akam.net: "48878.33"; a5-66.akam.net: "41824.7"; a5-66.akam.net: "41824.9". 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 2026100501 · primary a1-92.akam.net

Found

Primary (MNAME)
a1-92.akam.net
Contact (RNAME)
noc.trivago.net
Serial
2026100501
Refresh / retry
43200 s / 7200 s
Expire
2592000 s
Negative TTL
43200 s

Serial per nameserver

NameserverSerial
a1-92.akam.net (193.108.91.92)2026100501
a1-92.akam.net (2600:1401:2::5c)2026100501
a11-67.akam.net (84.53.139.67)2026100501
a11-67.akam.net (2600:1480:1::43)2026100501
a2-67.akam.net (95.100.174.67)2026100501
a2-67.akam.net (2600:1480:7000::43)2026100501
a22-64.akam.net (23.211.61.64)2026100501
a22-64.akam.net (2600:1480:7800::40)2026100501
a24-64.akam.net (2.16.130.64)2026100501
a24-64.akam.net (2600:1480:9800::40)2026100501
a5-66.akam.net (95.100.168.66)2026100501
a5-66.akam.net (2600:1480:b000::42)2026100501

Checks

  • ✓ Serial 2026100501 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 30d, negative TTL 12h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-92.akam.net is one of the listed nameservers.
  • ✓ Contact noc@trivago.net #25
    The SOA RNAME noc.trivago.net means noc@trivago.net.
  • ✓ Date-based serial #26
    The serial 2026100501 follows the YYYYMMDDnn convention (2026-10-05).

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

warn

35 records at the apex

Found

Read from
193.108.91.92:53
TypeValueTTL
SOAa1-92.akam.net. noc.trivago.net. 2026100501 43200 7200 2592000 4320014400
NSa11-67.akam.net.14400
NSa1-92.akam.net.14400
NSa22-64.akam.net.14400
NSa24-64.akam.net.14400
NSa2-67.akam.net.14400
NSa5-66.akam.net.14400
A2.16.204.1920
A2.16.204.3220
AAAA2a02:26f0:b700:5::210:cc2020
AAAA2a02:26f0:b700:5::210:cc1320
MX10 trivago-com.mail.protection.outlook.com.14400
TXT"v=spf1 ip4:194.153.186.220/32 ip6:2a0b:1300:0:dead:1::25/128 include:spf.protection.outlook.com include:_spf.trivago.com -all"14400
TXT"protonmail-verification=b664fb6e795393f3d523dc4d4dbc97ba0f269ff3"14400
TXT"docusign=7352f0ac-a27f-441a-98e5-972d8e443cbf"14400
TXT"onetrust-domain-verification=e1eec2d525264d9a8eb941b82bb1372c"14400
TXT"atlassian-domain-verification=2lciOX9dkr/VaL6sFK80OuY1ScKOJdSKc4Id2k0tDxcbgQTPr/BFazXuhcFXCzUp"14400
TXT"docker-verification=d9a2fe33-d6d0-4407-ace8-ca5697eb5bdd"14400
TXT"facebook-domain-verification=sjok2bexwgpv7b8lyylcx1rh0l93v2"14400
TXT"00d1r000000fjumeai"14400
TXT"google-site-verification=UMHGpjiz5sJbb6nakKs1_trtrcAzyiHIrlWQVcW4kv4"14400
TXT"1password-site-verification=5SEDCKBBDJDN3PNQVXLF2RCQXU"14400
TXT"brevo-code:e5d26db517fb0a9cc49b34b804c07d6c"14400
TXT"_t318md42a8z77zv8ddbqex1er71vuc6"14400
TXT"siih8ljW=447938b58f212ee55fedfad4982d3ddd"14400
TXT"workplace-domain-verification=gckxufsCaYKSsCTF0qpi4hLVqESj8N"14400
TXT"cursor-domain-verification-p43pcp=qxlE46BZDVKAblyLzPXGnoQCM"14400
TXT"google-site-verification=5-HKpUujDVU-2Xbwb0ajQlGCmNaZLYR6VO-EdxGrT8Q"14400
TXT"ahrefs-site-verification_cea55d4f0605952573fb1074a2c70c3c8d12e8e1d620a5fd14e8c279946181c9"14400
TXT"v=MCPv1; k=ed25519; p=tV+iFjgGt524EWNtBPBfcloiCVg9V284kJHSTfD88H0="14400
TXT"anthropic-domain-verification-pcq65v=bqHpyqk4OyUGXMbuNwjemV4gw"14400
TXT"1password-site-verification=JZVIW6WLTRGJDEE6EKZ4RQMDEM"14400
TXT"1password-site-verification=EPTMRKKDMJB4NNUYB75JR7R6KY"14400
TXT"apple-domain-verification=uh8cVXHMQwaTsk1i"14400
TXT"jetbrains-domain-verification=9g0ncaukdcddblb6z59nqinuy"14400

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 4h; resolvers may use either.
    #32
  • ✓ 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