vertiv.com

Checked 22 October 2026, 11:21 UTC · via 8.8.8.8
!Passed with warnings
24 passed 1 warning 0 failed 6 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2028-04-14

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
14 April 2011
Last changed
25 November 2018
Expires
14 April 2028
Status
client transfer prohibited
Registry nameservers
dns1.cscdns.net, dns2.cscdns.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 2028-04-14 #3
    The registration is valid until 2028-04-14 (540 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

dns1.cscdns.net, dns2.cscdns.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
dns1.cscdns.net, dns2.cscdns.net
NS in the zone
dns1.cscdns.net, dns2.cscdns.net
NameserverAddressesNetwork (AS)Glue
dns1.cscdns.net156.154.130.100 2610:a1:1022::100AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
dns2.cscdns.net156.154.131.100 2610:a1:1023::100AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.cscdns.net, dns2.cscdns.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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS12008 (VERCARA - Vercara, LLC, US): 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.cscdns.net 156.154.130.100NOERROR, 31 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
dns1.cscdns.net 2610:a1:1022::100NOERROR, 18 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
dns2.cscdns.net 156.154.131.100NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
dns2.cscdns.net 2610:a1:1023::100NOERROR, 6 ms, authoritativenoyes / yesrefusedUltraDNS 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: dns1.cscdns.net: "UltraDNS Nameserver"; dns2.cscdns.net: "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

pass

serial 2018092092 · primary dns1.cscdns.net

Found

Primary (MNAME)
dns1.cscdns.net
Contact (RNAME)
hostmaster.cscdns.net
Serial
2018092092
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
dns1.cscdns.net (156.154.130.100)2018092092
dns1.cscdns.net (2610:a1:1022::100)2018092092
dns2.cscdns.net (156.154.131.100)2018092092
dns2.cscdns.net (2610:a1:1023::100)2018092092

Checks

  • ✓ Serial 2018092092 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.cscdns.net is one of the listed nameservers.
  • ✓ Contact hostmaster@cscdns.net #25
    The SOA RNAME hostmaster.cscdns.net means hostmaster@cscdns.net.
  • ✓ Date-based serial #26
    The serial 2018092092 follows the YYYYMMDDnn convention (2018-09-20).

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

25 records at the apex

Found

Read from
156.154.130.100:53
TypeValueTTL
SOAdns1.cscdns.net. hostmaster.cscdns.net. 2018092092 28800 7200 604800 300300
NSdns1.cscdns.net.300
NSdns2.cscdns.net.300
A217.114.94.2300
MX0 vertiv-com.mail.protection.outlook.com.300
TXT"MS=ms25155138"300
TXT"MS=ms98550907"300
TXT"_0p8poh31b3dacy2pdzhmp9v781qcjlb"300
TXT"_lprxoxfoandphd3iyy6mtg2qo2ap9yj"300
TXT"docusign=7cad090a-8ee5-46c1-93f9-a9d9319"300
TXT"dropbox-domain-verification=y9l6d7jr3oft"300
TXT"apple-domain-verification=rlaxVVJEBeTbD7tv"300
TXT"docusign=32e78dd4-ab5e-467d-9ec9-73c021fb88df"300
TXT"docusign=3a695ff6-83a5-4963-845c-3a60052aeb70"300
TXT"docusign=8ce3b894-ac3f-4163-97df-d3efd6b03219"300
TXT"docusign=c4b1b672-e45e-4c7d-9d5c-ac576ba1aa04"300
TXT"facebook-domain-verification=4vtkbn7yivf4y8uspzp5axsj0aegek"300
TXT"onetrust-domain-verification=e16c989dc4b44cc382a840032c78f13b"300
TXT"v=spf1 ip4:204.92.21.0/25 ip4:66.48.80.0/25 ip4:160.34.15.16/28" " ip4:138.1.49.41 ip4:147.154.9.180 ip4:138.1.55.48 ip4:130.35.98.1 ip4:54.186.193.102 ip4:52.222.73.120 ip4:52.222.73.83" " ip4:52.222.62.51 ip4:52.222.75.85 ip4:129.213.108.188 ip4:129.213.52.209 ip4:198.2.132.142 ip4:148.163.143.101 ip4:148.163.147.152 ip4:198.22.41.64 ip4:81.88.48.78 ip4:81.88.48.66" " ip4:129.145.79.0/24 ip4:204.92.19.0/24 ip4:204.92.22.0/24 ip4:204.92.26.0/24 ip4:204.92.31.0/24 ip4:204.92.114.0/24 ip4:209.17.48.0/24 ip4:209.17.49.0/24 ip4:209.17.50.0/24 ip4:209.167.231.0/24" " ip4:144.191.0.0/16 ip4:142.0.160.0/20 ip4:68.232.128.0/20 ip4:129.145.16.0/21 ip4:141.145.8.0/21 ip4:129.91.16.0/21 ip4:129.145.76.0/22 ip4:139.60.152.0/22 ip4:162.247.216.0/22" " include:spf.protection.outlook.com include:spf_c.oracle.com include:spf_a.oracle.com include:spf_s1.oraclecloud.com include:_spf.zycus.com include:rp.oracleemaildelivery.com -all"300
TXT"google-site-verification=7cPMR4KvjxGvGQozu4ucB2WGX4s-2yif4UfOaE_FGho"300
TXT"google-site-verification=oPLfae5TrPxANBLFPjQBJIHnzjO1SAU9Icllpbiz9Bs"300
TXT"neat-pulse-domain-verification-nMVBlBM=2b15b6f1-b312-43d8-ad17-8d6dc1d04063"300
TXT"Es8LwDd0W6x5aTqzDK2B2t3e20A5wJChvuidJadWh/ZE9/L0YzeAzkEHj/CvQ4wF/oSVu24sdJ5q3Fh45adYJw=="300
TXT"cisco-ci-domain-verification=158139fe737cc118b86c89251363e5326f81ba6b23303221c510496ce84772bd"300
TXT"atlassian-domain-verification=MSfUpKYn/9yQgmq4Maaa9yyPPfaDheK9RXWNDjj2ASVBEz4HHMggVyTz4XfirKOC"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 2d and in the zone 5m; 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