hopin.com

Checked 22 October 2026, 09:12 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-06-10

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
11 June 1998
Last changed
9 May 2026
Expires
10 June 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
henry.ns.cloudflare.com, katja.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 2027-06-10 #3
    The registration is valid until 2027-06-10 (230 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

henry.ns.cloudflare.com, katja.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
henry.ns.cloudflare.com, katja.ns.cloudflare.com
NS in the zone
henry.ns.cloudflare.com, katja.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
henry.ns.cloudflare.com173.245.59.176 172.64.33.176 108.162.193.176 2a06:98c1:50::ac40:21b0 2606:4700:58::adf5:3bb0 2803:f800:50::6ca2:c1b0AS13335 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., US108.162.193.176 172.64.33.176 173.245.59.176 2606:4700:58::adf5:3bb0 2803:f800:50::6ca2:c1b0 2a06:98c1:50::ac40:21b0
katja.ns.cloudflare.com108.162.194.53 162.159.38.53 172.64.34.53 2803:f800:50::6ca2:c235 2a06:98c1:50::ac40:2235 2606:4700:50::a29f:2635AS13335 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., US108.162.194.53 162.159.38.53 172.64.34.53 2606:4700:50::a29f:2635 2803:f800:50::6ca2:c235 2a06:98c1:50::ac40:2235

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: henry.ns.cloudflare.com, katja.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
henry.ns.cloudflare.com 173.245.59.176NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
henry.ns.cloudflare.com 172.64.33.176NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
henry.ns.cloudflare.com 108.162.193.176NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
henry.ns.cloudflare.com 2a06:98c1:50::ac40:21b0NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
henry.ns.cloudflare.com 2606:4700:58::adf5:3bb0NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
henry.ns.cloudflare.com 2803:f800:50::6ca2:c1b0NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
katja.ns.cloudflare.com 108.162.194.53NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
katja.ns.cloudflare.com 162.159.38.53NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
katja.ns.cloudflare.com 172.64.34.53NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
katja.ns.cloudflare.com 2803:f800:50::6ca2:c235NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
katja.ns.cloudflare.com 2a06:98c1:50::ac40:2235NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
katja.ns.cloudflare.com 2606:4700:50::a29f:2635NOERROR, 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: henry.ns.cloudflare.com: "2026.10.2"; katja.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 2417990223 · primary henry.ns.cloudflare.com

Found

Primary (MNAME)
henry.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417990223
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
henry.ns.cloudflare.com (173.245.59.176)2417990223
henry.ns.cloudflare.com (172.64.33.176)2417990223
henry.ns.cloudflare.com (108.162.193.176)2417990223
henry.ns.cloudflare.com (2a06:98c1:50::ac40:21b0)2417990223
henry.ns.cloudflare.com (2606:4700:58::adf5:3bb0)2417990223
henry.ns.cloudflare.com (2803:f800:50::6ca2:c1b0)2417990223
katja.ns.cloudflare.com (108.162.194.53)2417990223
katja.ns.cloudflare.com (162.159.38.53)2417990223
katja.ns.cloudflare.com (172.64.34.53)2417990223
katja.ns.cloudflare.com (2803:f800:50::6ca2:c235)2417990223
katja.ns.cloudflare.com (2a06:98c1:50::ac40:2235)2417990223
katja.ns.cloudflare.com (2606:4700:50::a29f:2635)2417990223

Checks

  • ✓ Serial 2417990223 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 henry.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 2417990223 is a Unix timestamp (2046-08-15 23:57 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

pass

55 records at the apex

Found

Read from
173.245.59.176:53
TypeValueTTL
SOAhenry.ns.cloudflare.com. dns.cloudflare.com. 2417990223 10000 2400 604800 18001800
NShenry.ns.cloudflare.com.86400
NSkatja.ns.cloudflare.com.86400
A198.202.211.1300
MX1 aspmx.l.google.com.300
MX10 alt3.aspmx.l.google.com.300
MX10 alt4.aspmx.l.google.com.300
MX5 alt1.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
TXT"MS=ms11377262"120
TXT"ZOOM_verify_B8KbWnD5Sl-mDgHKgUKvkw"120
TXT"addevent=verification"120
TXT"apple-domain-verification=WVJdUNDy0uUSkWFc"120
TXT"asv=3dbb2c5f57a311bcd68ed582f5894ae4"120
TXT"atlassian-domain-verification=iASXXs8Z9w8OXRJWklQ6hzl1mF/xzrbwnQ2JReK6UTaPLTBrB9TLUYR/4INgSyEl"120
TXT"atlassian-sending-domain-verification=9b2649ea-f95d-442d-9ecb-55ee2a659329"120
TXT"box-domain-verification=d37d4f5a6c5a31ba483891680303449e338744080f8bc91a1d593d5ca8026638"120
TXT"docusign=8bc9650b-08bb-4b63-8637-dd6e9054346a"120
TXT"facebook-domain-verification=grapin1p0ssux2sl7uo3gb6vo5f1nm"120
TXT"google-site-verification=-0VfErInm7l6S1MUQ6rUtrVSqFjZcNpR5-X5HIZ_kqk"120
TXT"google-site-verification=2bClwR5ob2qmtJ-CVEYqff3OQ_9_B7B4jhrPRpBpmAE"120
TXT"google-site-verification=7kMgD8onzJkidtfaG2QE2Eqje9R9VjAcosT-hYcocKg"120
TXT"google-site-verification=AJhpbKg8svaZTRHRXNSItNKDZ_cbT3rGT_c8Axl4MCg"120
TXT"google-site-verification=AvPQ407JvrrE60_kyRLh-Mhlib-pjgL9n4F0spoHg0Y"120
TXT"google-site-verification=Fc0bYsGHQQzqpGFaKn5QJCeW2YJqqMdl2RLdEYvkPYI"120
TXT"google-site-verification=S_p5Qca6TNGMV29DHrWzO6o6ao0iarhAOaNmaV5UYGk"120
TXT"google-site-verification=ZssaoaaLTFPAcWhN0tVg-BmtToq8bIeznMoO30cXckw"120
TXT"google-site-verification=bFJCRNusq5rdH8XYGLezuUjyXgQfgITA1_mXVqQg8jo"120
TXT"google-site-verification=fJoO3WrkVfyK8JjwM7oN7KOxnpjy6UncTFssEJSOsrg"120
TXT"google-site-verification=lx9FNTRH9k0kmAdImw4FkTRmrjP40mgb5WoK7Gse2o4"120
TXT"google-site-verification=nTp5YCy-u6X23djxpx6ky2ys4XBuJIYwYxh02UUjUfo"120
TXT"google-site-verification=s7RobG9oIN7d3EJhiLyrDrUy6eQCww1rZZdWuK-l30o"120
TXT"hubspot-developer-verification=Y2YxYjAwYzAtYWJiYy00OTI2LWIzNmYtNzE3MmI1Nzk4YWE3"120
TXT"knowbe4-site-verification=6ab249964ef2f2b265f6d4436d8b4791"120
TXT"miro-verification=440b408427352cf0b43d4ac03264aa75c5b46099"120
TXT"mongodb-site-verification=mGM94w83aPMexmB3pNY5m6jwonYmcGNf"120
TXT"notion-domain-verification=yubHrGCaaLUwpUaoQPBufQ3AVQ6IASANKzDL67JHuPV"120
TXT"segment-site-verification=nwp1utdjhCBSVIWtb8o4vrnRnCjYVFB5"120
TXT"v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all"120
TXT"zapier-domain-verification-challenge=63ac5a45-77a1-4ac3-a2fc-25bf4bd4dff7"120
CAA0 iodef "mailto:secops@hopin.com"1800
CAA0 issue "amazon.com"1800
CAA0 issue "awstrust.com"1800
CAA0 issue "comodoca.com"1800
CAA0 issue "digicert.com; cansignhttpexchanges=yes"1800
CAA0 issue "letsencrypt.org"1800
CAA0 issue "pki.goog; cansignhttpexchanges=yes"1800
CAA0 issue "ssl.com"1800
CAA0 issuewild "amazon.com"1800
CAA0 issuewild "awstrust.com"1800
CAA0 issuewild "comodoca.com"1800
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"1800
CAA0 issuewild "letsencrypt.org"1800
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"1800
CAA0 issuewild "ssl.com"1800

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, awstrust.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.