rolls-royce.com

Checked 22 October 2026, 10:32 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2028-07-21

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
22 July 1997
Last changed
17 July 2026
Expires
21 July 2028
Status
client transfer prohibited
Registry nameservers
ns0.bt.net, ns1.bt.net, ns2.bt.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 2028-07-21 #3
    The registration is valid until 2028-07-21 (637 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

ns0.bt.net, ns1.bt.net, ns2.bt.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns0.bt.net, ns1.bt.net, ns2.bt.net
NS in the zone
ns0.bt.net, ns1.bt.net, ns2.bt.net
NameserverAddressesNetwork (AS)Glue
ns0.bt.net217.35.209.188AS2856 BT-UK-AS - British Telecommunications Limited, GB-
ns1.bt.net217.32.105.91AS2856 BT-UK-AS - British Telecommunications Limited, GB-
ns2.bt.net217.32.105.90AS2856 BT-UK-AS - British Telecommunications Limited, GB-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns0.bt.net, ns1.bt.net, ns2.bt.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 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS2856 (BT-UK-AS - British Telecommunications Limited, GB): 3 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

info

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns0.bt.net 217.35.209.188NOERROR, 24 ms, authoritativenoyes / yesrefusedgo away
ns1.bt.net 217.32.105.91NOERROR, 27 ms, authoritativenoyes / yesrefusedgo away
ns2.bt.net 217.32.105.90NOERROR, 27 ms, authoritativenoyes / yesrefusedgo away

Checks

  • ✓ All respond #14
    All 3 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: ns0.bt.net: "go away"; ns1.bt.net: "go away"; ns2.bt.net: "go away".
    #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 2017023050 · primary ns0.bt.net

Found

Primary (MNAME)
ns0.bt.net
Contact (RNAME)
hostmaster.bt.net
Serial
2017023050
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns0.bt.net (217.35.209.188)2017023050
ns1.bt.net (217.32.105.91)2017023050
ns2.bt.net (217.32.105.90)2017023050

Checks

  • ✓ Serial 2017023050 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns0.bt.net is one of the listed nameservers.
  • ✓ Contact hostmaster@bt.net #25
    The SOA RNAME hostmaster.bt.net means hostmaster@bt.net.
  • ✓ Timestamp serial #26
    The serial 2017023050 is a Unix timestamp (2033-12-01 04:10 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

30 records at the apex

Found

Read from
217.35.209.188:53
TypeValueTTL
SOAns0.bt.net. hostmaster.bt.net. 2017023050 28800 7200 604800 86400600
NSns0.bt.net.600
NSns1.bt.net.600
NSns2.bt.net.600
A52.17.142.19986400
MX20 mx2.rolls-royce.c3s2.iphmx.com.300
MX10 mxa-004f7902.gslb.pphosted.com.300
MX20 mx1.rolls-royce.c3s2.iphmx.com.300
MX10 mxb-004f7902.gslb.pphosted.com.300
TXT"m5quk2jr2u711voaaqokthmkh4"3600
TXT"v=spf1 exists:%{i}.spf.rolls-royce.c3s2.iphmx.com ip4:132.244.72.69 ip4:132.244.72.54/31 ip4:192.40.173.140/31 ip4:46.235.193.39 ip4:46.235.193.40 ip4:62.13.153.174 ip4:192.73.18.10 ip4:185.79.166.10 ip4:185.227.62.134 ip4:193.42.254.24/31 ip4:185.4.4.17 " "ip4:54.229.2.165 ip4:52.30.130.201 ip4:85.159.248.144/28 ip4:143.55.147.19 ip4:66.159.244.74 ip4:212.127.3.148/30 ip4:212.127.1.148/30 ip4:64.95.144.128/25 ip4:64.94.2.0/28 ip4:128.136.242.224/27 ip4:45.15.193.192/27 ip4:139.178.74.40/29 ip4:66.159.228.13" " ip4:66.159.227.13 include:spf.protection.outlook.com include:messagelabs.com include:u20095718.wl219.sendgrid.net include:spf.mailjet.com include:spfs.aravo.com ~all"3600
TXT"apple-domain-verification=Bh3j0DvyyIxGi4Qd"3600
TXT"MS=ms98360363"3600
TXT"apple-domain-verification=YwboR2lfRN4ER86i"3600
TXT"d365mktkey=jaInop5I66kkQ20THF6w63dF4sHDli06kibYU0K88vEx"3600
TXT"ms-domain-verification=65ecaa2a-372a-406d-af7c-fd00e884bd3c"3600
TXT"webexdomainverification.=c9002323-b123-4101-bca6-eaf88405cdbd"3600
TXT"739"3600
TXT"ncja5v85ul0g77eqgk7m1cnt2q"3600
TXT"docusign=ed79acc4-73f0-43f4-ab7f-89c99a48e253"3600
TXT"google-site-verification=2t8VNBG0NapOtx809OYrvGI1ZYq9ENuq6qnBis91uJo"3600
TXT"cm9sbHM="3600
TXT"as=1483625869"3600
TXT"ms31417488.msv1.invalid"3600
TXT"5vh6qdktmgqbpv5ju6car9aa34"3600
TXT"amazonses:Pdt1BWi4m29cC2HznbApn/C8/4vEDVNQPlSGDR9pxvA="3600
TXT"dtm-domain-verification=GenHRB1tAqkST5taqclt2pYfgTLARUeKbokOUi8LfQo"3600
TXT"MS=ms31417488"3600
TXT"figma-domain-verification=3db07f66f073d38282339c826c6e6830cd3ee847faca9a950c4687f7278ba573-1784736171"3600
TXT"MS=ms29802878"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, MX 5m, NS 10m. The NS TTL at the parent is 2d and in the zone 10m; 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