informa.com

Checked 22 October 2026, 09:20 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 6 info

Registration

info

.com generic · SafeNames Ltd. · expires 2027-03-03

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
SafeNames Ltd.
Registered
2 March 1995
Last changed
4 March 2026
Expires
3 March 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
priscilla.ns.cloudflare.com, sterling.ns.cloudflare.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 2027-03-03 #3
    The registration is valid until 2027-03-03 (131 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update 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

info

priscilla.ns.cloudflare.com, sterling.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
priscilla.ns.cloudflare.com, sterling.ns.cloudflare.com
NS in the zone
priscilla.ns.cloudflare.com, sterling.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
priscilla.ns.cloudflare.com162.159.38.189 172.64.34.189 108.162.194.189 2803:f800:50::6ca2:c2bd 2a06:98c1:50::ac40:22bd 2606:4700:50::a29f:26bdAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.194.189 162.159.38.189 172.64.34.189 2606:4700:50::a29f:26bd 2803:f800:50::6ca2:c2bd 2a06:98c1:50::ac40:22bd
sterling.ns.cloudflare.com108.162.195.143 172.64.35.143 162.159.44.143 2606:4700:58::a29f:2c8f 2803:f800:50::6ca2:c38f 2a06:98c1:50::ac40:238fAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.195.143 162.159.44.143 172.64.35.143 2606:4700:58::a29f:2c8f 2803:f800:50::6ca2:c38f 2a06:98c1:50::ac40:238f

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: priscilla.ns.cloudflare.com, sterling.ns.cloudflare.com.
    #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 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 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 .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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
priscilla.ns.cloudflare.com 162.159.38.189NOERROR, 31 ms, authoritativenoyes / yesrefused2026.10.2
priscilla.ns.cloudflare.com 172.64.34.189NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
priscilla.ns.cloudflare.com 108.162.194.189NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
priscilla.ns.cloudflare.com 2803:f800:50::6ca2:c2bdNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
priscilla.ns.cloudflare.com 2a06:98c1:50::ac40:22bdNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
priscilla.ns.cloudflare.com 2606:4700:50::a29f:26bdNOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
sterling.ns.cloudflare.com 108.162.195.143NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
sterling.ns.cloudflare.com 172.64.35.143NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
sterling.ns.cloudflare.com 162.159.44.143NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
sterling.ns.cloudflare.com 2606:4700:58::a29f:2c8fNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
sterling.ns.cloudflare.com 2803:f800:50::6ca2:c38fNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
sterling.ns.cloudflare.com 2a06:98c1:50::ac40:238fNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2

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: priscilla.ns.cloudflare.com: "2026.10.2"; sterling.ns.cloudflare.com: "2026.10.2". 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 2418145723 · primary priscilla.ns.cloudflare.com

Found

Primary (MNAME)
priscilla.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418145723
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
priscilla.ns.cloudflare.com (162.159.38.189)2418145723
priscilla.ns.cloudflare.com (172.64.34.189)2418145723
priscilla.ns.cloudflare.com (108.162.194.189)2418145723
priscilla.ns.cloudflare.com (2803:f800:50::6ca2:c2bd)2418145723
priscilla.ns.cloudflare.com (2a06:98c1:50::ac40:22bd)2418145723
priscilla.ns.cloudflare.com (2606:4700:50::a29f:26bd)2418145723
sterling.ns.cloudflare.com (108.162.195.143)2418145723
sterling.ns.cloudflare.com (172.64.35.143)2418145723
sterling.ns.cloudflare.com (162.159.44.143)2418145723
sterling.ns.cloudflare.com (2606:4700:58::a29f:2c8f)2418145723
sterling.ns.cloudflare.com (2803:f800:50::6ca2:c38f)2418145723
sterling.ns.cloudflare.com (2a06:98c1:50::ac40:238f)2418145723

Checks

  • ✓ Serial 2418145723 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver priscilla.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2418145723 is a Unix timestamp (2046-08-17 19:08 UTC).

DNSSEC

warn

Signed, but no DS at parent

Found

Validated by resolver
no
Denial of existence
NSEC
Signatures valid until
23 October 2026

DNSKEY in the zone

Key tagRoleAlgorithm
2371KSK (257)ECDSAP256SHA256 (13)
34505ZSK (256)ECDSAP256SHA256 (13)

Checks

  • !
    Signed but not delegated securely
    The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.
    #27
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 50h0m0s and created on demand; the current one was made at 2026-10-21 08:20 UTC and expires at 2026-10-23 10:20 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

info

61 records at the apex

Found

Read from
162.159.38.189:53
TypeValueTTL
SOApriscilla.ns.cloudflare.com. dns.cloudflare.com. 2418145723 10000 2400 604800 18001800
NSpriscilla.ns.cloudflare.com.86400
NSsterling.ns.cloudflare.com.86400
A104.18.43.188300
A172.64.144.68300
AAAA2a06:98c1:3109::ac40:9044300
AAAA2a06:98c1:3109::6812:2bbc300
MX10 us-smtp-inbound-1.mimecast.com.900
MX10 us-smtp-inbound-2.mimecast.com.900
TXT"00D28000001yIs1=1TBfu00000001Yn"300
TXT"00DC80000001Za1=1TBC800000000uT"300
TXT"00DKL000000LHVG=1TBAd0000000EhJ"300
TXT"00DKN0000000XJU=1TBAd0000000EpN"300
TXT"IbohohmNlATqva4R9orcwncEZm855JQEjnx5cm7Ph9bOhp80YOJuTgQZpSuIYFgs6TIAahCtPH0/Df8ULzzSkQ=="300
TXT"ZOOM_verify_99qvLS6AT98u2DqVdm7mlO"300
TXT"adobe-idp-site-verification=8167c264-e62d-41a7-b8a1-3c011f49838c"300
TXT"adobe-sign-verification=f02ac030d66330af58912522c1b17862"300
TXT"airtable-verification=86dd7ec6dbd598a57a59d02e47e3d0a1"300
TXT"amazonses:YC8Hur1jj+3qzFl5u23JzxUvTex2ra5tXWT2tD08ICI="300
TXT"amazonses:kYcc3XcxX5C1pgG2f8BkQde20S8RByqyG8pb7FZx0e0="300
TXT"amazonses:vza9TS/+uMgZr3Xfz9eOZljajyCcjw7c8Q0KOKtyEXw="300
TXT"amazonses:xEth2JzKHno7tTVpttG3Tx2oMcBRnnvrHKliJQvQTe8="300
TXT"anthropic-domain-verification-cnpgk9=rM21sWqaWM6fKUT38jCPrSVoY"300
TXT"apple-domain-verification=H9WCJ5unZpZSO4YQ"300
TXT"asv=82258bf1c2c5021db2988cbeb32d81d7"300
TXT"atlassian-domain-verification=3wHwvbTxm1CJM1uafxIGZ7ZSSrFkPfGFONLf7A5tXNjvnHaG/esF3g92NgWYiowm"300
TXT"atlassian-domain-verification=NHkkzpOydFugfvwgyyoSLIfs1haffNEUWFjdoq4O5z8UBAvRof15pUmulo7lvcWj"300
TXT"atlassian-domain-verification=Ppsbz6J3yviTP992xtvQmfd4O6I/hFjK9/pM8puGW3/9oon7JOv54PCntThYNiYn"300
TXT"atlassian-domain-verification=nHgDqYO1E31S5t6Yaiy/u2F2GIRP6j8s/6AvRWKwvDHnDV00UesEpr5ZRSeY37Bw"300
TXT"docusign=1642e0e0-972b-44e2-8547-248f1ec6448c"300
TXT"docusign=510763dc-3845-4673-9e6b-2760fc2d3c42"300
TXT"docusign=5e913eb6-53ae-47bd-a87c-4f6145c15325"300
TXT"docusign=b905ee68-3443-4f40-8223-ee86f8bda389"300
TXT"docusign=bfcb5743-251a-4570-9ee3-831b842539fa"300
TXT"docusign=f3ea3ddf-2712-4bb8-a1e4-a18346023da9"300
TXT"docusign=ff710d7a-7a19-4830-b808-6970d4119d73"300
TXT"dropbox-domain-verification=85sxii0ds62d"300
TXT"drpchgxhfs68zqpj59cp8fbhwp55781h"300
TXT"figma-domain-verification=c8152c8de716da11a5780e3c05f5f0884ca8e9b195cd8ab7db072ce013329169-1791901698"300
TXT"google-site-verification=0PUh81E77rH0hqSesyasMhpRDB0_QyUkuVZCFjNIBQ0"300
TXT"google-site-verification=45w2cER_RyNwCCs47ZItpmgjSENRywTbwKNtFPJOvCo"300
TXT"google-site-verification=eBA_l_4LFn8g-dPBBjkds4EfCS1tAb3503DgdE9N-i4"300
TXT"google-site-verification=sVGWlot1ZiETg74Q0QbSDSCgAh8TYyMxLTBjxpf2MXg"300
TXT"google-site-verification=uDhvxISenrOfP0bnj34VG2D04AgYzDROBVihZSoq9U0"300
TXT"invevo-domain-verification-xbv8gg=mg4WQhsLH3aVbf9TfUU7Rd2LK"300
TXT"jamf-site-verification=lpIfnDbYtqOHK1_arZd_LA"300
TXT"logmein-verification-code=5ae2611b-53ce-46df-9f18-7a7420f36fb6"300
TXT"loom-site-verification=4d72321e5cc34f3285550f36301bbb52"300
TXT"miro-verification=379e7a35b2d0a9e2c172a5109e487aa616b9b0f7"300
TXT"miro-verification=a809b36ccd57128930cca45fc29da6c010c25fbb"300
TXT"mongodb-site-verification=PBeR40APY38jj60uveoQ0kLkIOczHzLN"300
TXT"nitro-verification-code=NjAyODA2ODkzMjUxNjQxNTczMA=="300
TXT"pexip-ms-tenant-domain-verification=06d9c2d7-c2f0-408f-8b85-be3f1af05163"300
TXT"sending_domain83602=ee59f7e2fb2fb870c3df5222ea1d4f7ea57ac2f11d9979a7442ce42f982e79df"300
TXT"smartsheet-site-validation=Fp3k44r1cNMJdBbsPrGlZKjczK1UybiF"300
TXT"smartsheet-site-validation=u7WdVMKNEpvljNSskXORnGpl_H19VM9q"300
TXT"stripe-verification=4C1B28EE6AC6A39D9B458B33F193868AA9E0AF32DC83428CA1253880C091F941"300
TXT"stripe-verification=a8169ed2529a9a9a790ce8802cc843ee793b24c0aa991986ef48d59c01f6699f"300
TXT"v=spf1 include:_u.informa.com._spf.smart.ondmarc.com ~all"300
TXT"v=verifydomain MS=ms43348910"300
TXT"wiz-domain-verification=bbd0cf32654223b50cbda5d66ff106e267f77a3b4110d9be6ec042dfb9e15485"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 15m, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; 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