vrbo.com

Checked 22 October 2026, 11:23 UTC · via 8.8.8.8
!Passed with warnings
24 passed 3 warnings 0 failed 4 info

Registration

info

.com generic · GoDaddy Corporate Domains, LLC · expires 2027-08-05

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy Corporate Domains, LLC
Registered
30 July 1996
Last changed
1 December 2025
Expires
5 August 2027
Status
client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
dns1.p09.nsone.net, dns2.p09.nsone.net, dns3.p09.nsone.net, dns4.p09.nsone.net, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk
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 2027-08-05 #3
    The registration is valid until 2027-08-05 (286 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

pass

dns1.p09.nsone.net, dns2.p09.nsone.net, dns3.p09.nsone.net, dns4.p09.nsone.net, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns1.p09.nsone.net, dns2.p09.nsone.net, dns3.p09.nsone.net, dns4.p09.nsone.net, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk
NS in the zone
dns1.p09.nsone.net, dns2.p09.nsone.net, dns3.p09.nsone.net, dns4.p09.nsone.net, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk
NameserverAddressesNetwork (AS)Glue
dns1.p09.nsone.net198.51.44.9 2620:4d:4000:6259:7:9:0:1AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns2.p09.nsone.net198.51.45.9 2a00:edc0:6259:7:9::2AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns3.p09.nsone.net198.51.44.73 2620:4d:4000:6259:7:9:0:3AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
dns4.p09.nsone.net198.51.45.73 2a00:edc0:6259:7:9::4AS62597 NSONE - NSONE Inc, US AS62597 NSONE - NSONE Inc, US-
pdns1.ultradns.net204.74.108.1 2001:502:f3ff::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns2.ultradns.net204.74.109.1 2610:a1:1014::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns3.ultradns.org199.7.68.1 2610:a1:1015::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns4.ultradns.org199.7.69.1 2001:502:4612::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns5.ultradns.info204.74.114.1 2610:a1:1016::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns6.ultradns.co.uk204.74.115.1 2610:a1:1017::1AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-

Checks

  • ✓ 10 nameservers #6
    Delegated to dns1.p09.nsone.net, dns2.p09.nsone.net, dns3.p09.nsone.net, dns4.p09.nsone.net, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk.
  • ✓ 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 8 IPv4 /24s and 8 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12008 (VERCARA - Vercara, LLC, US): 12 addresses; AS62597 (NSONE - NSONE Inc, US): 8 addresses.
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .info, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

20 of 20 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.p09.nsone.net 198.51.44.9NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns1.p09.nsone.net 2620:4d:4000:6259:7:9:0:1NOERROR, 5 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p09.nsone.net 198.51.45.9NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns2.p09.nsone.net 2a00:edc0:6259:7:9::2NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p09.nsone.net 198.51.44.73NOERROR, 7 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns3.p09.nsone.net 2620:4d:4000:6259:7:9:0:3NOERROR, 7 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p09.nsone.net 198.51.45.73NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
dns4.p09.nsone.net 2a00:edc0:6259:7:9::4NOERROR, 4 ms, authoritativenoyes / yesrefused19dd46e347df36b70933bf2be8023258586586a9
pdns1.ultradns.net 204.74.108.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns1.ultradns.net 2001:502:f3ff::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns2.ultradns.net 204.74.109.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns2.ultradns.net 2610:a1:1014::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns3.ultradns.org 199.7.68.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns3.ultradns.org 2610:a1:1015::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns4.ultradns.org 199.7.69.1NOERROR, 31 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns4.ultradns.org 2001:502:4612::1NOERROR, 32 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns5.ultradns.info 204.74.114.1NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns5.ultradns.info 2610:a1:1016::1NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns6.ultradns.co.uk 204.74.115.1NOERROR, 13 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns6.ultradns.co.uk 2610:a1:1017::1NOERROR, 13 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver

Checks

  • ✓ All respond #14
    All 20 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: dns1.p09.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns2.p09.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns3.p09.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; dns4.p09.nsone.net: "19dd46e347df36b70933bf2be8023258586586a9"; pdns1.ultradns.net: "UltraDNS Nameserver"; pdns2.ultradns.net: "UltraDNS Nameserver"; pdns3.ultradns.org: "UltraDNS Nameserver"; pdns4.ultradns.org: "UltraDNS Nameserver"; pdns5.ultradns.info: "UltraDNS Nameserver"; pdns6.ultradns.co.uk: "UltraDNS 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

warn

serial 1657295511 · primary dns1.p01.nsone.net

Found

Primary (MNAME)
dns1.p01.nsone.net
Contact (RNAME)
domains.expediagroup.com
Serial
1657295511
Refresh / retry
43200 s / 7200 s
Expire
1209600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns1.p09.nsone.net (198.51.44.9)1657295511
dns1.p09.nsone.net (2620:4d:4000:6259:7:9:0:1)1657295511
dns2.p09.nsone.net (198.51.45.9)1657295511
dns2.p09.nsone.net (2a00:edc0:6259:7:9::2)1657295511
dns3.p09.nsone.net (198.51.44.73)1657295511
dns3.p09.nsone.net (2620:4d:4000:6259:7:9:0:3)1657295511
dns4.p09.nsone.net (198.51.45.73)1657295511
dns4.p09.nsone.net (2a00:edc0:6259:7:9::4)1657295511
pdns1.ultradns.net (204.74.108.1)1657295567
pdns1.ultradns.net (2001:502:f3ff::1)1657295567
pdns2.ultradns.net (204.74.109.1)1657295567
pdns2.ultradns.net (2610:a1:1014::1)1657295567
pdns3.ultradns.org (199.7.68.1)1657295567
pdns3.ultradns.org (2610:a1:1015::1)1657295567
pdns4.ultradns.org (199.7.69.1)1657295567
pdns4.ultradns.org (2001:502:4612::1)1657295567
pdns5.ultradns.info (204.74.114.1)1657295567
pdns5.ultradns.info (2610:a1:1016::1)1657295567
pdns6.ultradns.co.uk (204.74.115.1)1657295567
pdns6.ultradns.co.uk (2610:a1:1017::1)1657295567

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 1657295511 on dns1.p09.nsone.net (198.51.44.9), dns1.p09.nsone.net (2620:4d:4000:6259:7:9:0:1), dns2.p09.nsone.net (198.51.45.9), dns2.p09.nsone.net (2a00:edc0:6259:7:9::2), dns3.p09.nsone.net (198.51.44.73), dns3.p09.nsone.net (2620:4d:4000:6259:7:9:0:3), dns4.p09.nsone.net (198.51.45.73), dns4.p09.nsone.net (2a00:edc0:6259:7:9::4); 1657295567 on pdns1.ultradns.net (204.74.108.1), pdns1.ultradns.net (2001:502:f3ff::1), pdns2.ultradns.net (204.74.109.1), pdns2.ultradns.net (2610:a1:1014::1), pdns3.ultradns.org (199.7.68.1), pdns3.ultradns.org (2610:a1:1015::1), pdns4.ultradns.org (199.7.69.1), pdns4.ultradns.org (2001:502:4612::1), pdns5.ultradns.info (204.74.114.1), pdns5.ultradns.info (2610:a1:1016::1), pdns6.ultradns.co.uk (204.74.115.1), pdns6.ultradns.co.uk (2610:a1:1017::1). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.
    #22
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 2h, expire 14d, negative TTL 1h.
  • i
    Hidden master
    The primary nameserver dns1.p01.nsone.net is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact domains@expediagroup.com #25
    The SOA RNAME domains.expediagroup.com means domains@expediagroup.com.
  • ✓ Timestamp serial #26
    The serial 1657295511 is a Unix timestamp (2022-07-08 15:51 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

warn

36 records at the apex

Found

Read from
198.51.44.9:53
TypeValueTTL
SOAdns1.p01.nsone.net. domains.expediagroup.com. 1657295511 43200 7200 1209600 36003600
NSdns1.p09.nsone.net.3600
NSdns2.p09.nsone.net.3600
NSdns3.p09.nsone.net.3600
NSdns4.p09.nsone.net.3600
NSpdns1.ultradns.net.3600
NSpdns2.ultradns.net.3600
NSpdns3.ultradns.org.3600
NSpdns4.ultradns.org.3600
NSpdns5.ultradns.info.3600
NSpdns6.ultradns.co.uk.3600
A2.16.241.21720
A2.16.241.20320
AAAA2a02:26f0:3400::1703:582820
AAAA2a02:26f0:3400::1703:584120
MX10 mxa.expediagroup.com.3600
MX10 mxb.expediagroup.com.3600
TXT"1wolbrqwoCObdxC9G93EA76bPvlWON5svPEymxv9VJX2piJNpB2fvTEx9AuBb+CeO4F+ti99rtfT9FgggZSfFA=="3600
TXT"5ctfvm6las9i0brfbfmbsb644k"3600
TXT"MS=ms18587922"3600
TXT"Validity-DomainVerification=M7anjkdLSIe279_lLHGI129qQ="3600
TXT"adobe-idp-site-verification=b41c23aaa74626ffffc55a59a6acf723e991ccd6604e9b4b6e215e8ef62f0e8e"3600
TXT"apple-domain-verification=nBx_zynGhN20XhjOhYF49B7BD5JbZAuW2gbPVDPrVVk"3600
TXT"atlassian-domain-verification=BoDCBNyHJzHh97Myx/Z4n3grU8sMEGR10Mi8CdpStC01PdMAuIARlKP/odGI7CvN"3600
TXT"docusign=3d8fbf3d-d176-4b88-b961-e2743b9c9161"3600
TXT"dropbox-domain-verification=nfxk5s331hym"3600
TXT"facebook-domain-verification=kj7l4cwqftpopbeord2swqwepbsp4o"3600
TXT"google-site-verification=2OCAEpwy7Vv5-nn1RtZi9G_Rke-cjJQDlxE5SCzcT30"3600
TXT"miro-verification=d36744c01c72c4c0e036eacc18ffe55264b3bf81"3600
TXT"mixpanel-domain-verify=0e7d28f7-e5c2-4e51-b4f9-75be77f1b088"3600
TXT"ptj8dr6ughomcut7nus15sh1a9"3600
TXT"slack-domain-verification=7yM0PM3dCrAA1eDe4Q2iRnE8xEDQiAdjBXtszZbA"3600
TXT"smartsheet-site-validation=70RJ3RRXAtFWl_DnBGzP43VTvl2SnOfZ"3600
TXT"v=BIMI1; l=https://csvcus.homeaway.com/rsrcs/cdn-logos/4.5.0/sitename/vrbo/web/logo.svg; a=;"3600
TXT"v=spf1 a:zgateway.zuora.com include:_netblocks.google.com include:spf.mandrillapp.com include:servers.mcsv.net include:mktomail.com include:_spf.salesforce.com ip4:198.175.56.0/24 ip4:198.151.49.0/24 ~all"3600
TXT"apple-domain-verification=IFbG8GNo1LMAFWVc"3600

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 1h; 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