proz.com

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

Registration

info

.com generic · GoDaddy.com, LLC · expires 2033-02-04

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy.com, LLC
Registered
4 February 1999
Last changed
5 February 2024
Expires
4 February 2033
Status
client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited
Registry nameservers
grannbo.ns.cloudflare.com, jihoon.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 2033-02-04 #3
    The registration is valid until 2033-02-04 (2296 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client renew 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

grannbo.ns.cloudflare.com, jihoon.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
grannbo.ns.cloudflare.com, jihoon.ns.cloudflare.com
NS in the zone
grannbo.ns.cloudflare.com, jihoon.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
grannbo.ns.cloudflare.com162.159.38.150 172.64.34.150 108.162.194.150 2a06:98c1:50::ac40:2296 2803:f800:50::6ca2:c296 2606:4700:50::a29f:2696AS13335 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., US108.162.194.150 162.159.38.150 172.64.34.150 2606:4700:50::a29f:2696 2803:f800:50::6ca2:c296 2a06:98c1:50::ac40:2296
jihoon.ns.cloudflare.com108.162.195.233 172.64.35.233 162.159.44.233 2a06:98c1:50::ac40:23e9 2803:f800:50::6ca2:c3e9 2606:4700:58::a29f:2ce9AS13335 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., US108.162.195.233 162.159.44.233 172.64.35.233 2606:4700:58::a29f:2ce9 2803:f800:50::6ca2:c3e9 2a06:98c1:50::ac40:23e9

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: grannbo.ns.cloudflare.com, jihoon.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
grannbo.ns.cloudflare.com 162.159.38.150NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
grannbo.ns.cloudflare.com 172.64.34.150NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
grannbo.ns.cloudflare.com 108.162.194.150NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
grannbo.ns.cloudflare.com 2a06:98c1:50::ac40:2296NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
grannbo.ns.cloudflare.com 2803:f800:50::6ca2:c296NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
grannbo.ns.cloudflare.com 2606:4700:50::a29f:2696NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
jihoon.ns.cloudflare.com 108.162.195.233NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
jihoon.ns.cloudflare.com 172.64.35.233NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
jihoon.ns.cloudflare.com 162.159.44.233NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
jihoon.ns.cloudflare.com 2a06:98c1:50::ac40:23e9NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
jihoon.ns.cloudflare.com 2803:f800:50::6ca2:c3e9NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
jihoon.ns.cloudflare.com 2606:4700:58::a29f:2ce9NOERROR, 5 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: grannbo.ns.cloudflare.com: "2026.10.2"; jihoon.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 2417067117 · primary grannbo.ns.cloudflare.com

Found

Primary (MNAME)
grannbo.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417067117
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
grannbo.ns.cloudflare.com (162.159.38.150)2417067117
grannbo.ns.cloudflare.com (172.64.34.150)2417067117
grannbo.ns.cloudflare.com (108.162.194.150)2417067117
grannbo.ns.cloudflare.com (2a06:98c1:50::ac40:2296)2417067117
grannbo.ns.cloudflare.com (2803:f800:50::6ca2:c296)2417067117
grannbo.ns.cloudflare.com (2606:4700:50::a29f:2696)2417067117
jihoon.ns.cloudflare.com (108.162.195.233)2417067117
jihoon.ns.cloudflare.com (172.64.35.233)2417067117
jihoon.ns.cloudflare.com (162.159.44.233)2417067117
jihoon.ns.cloudflare.com (2a06:98c1:50::ac40:23e9)2417067117
jihoon.ns.cloudflare.com (2803:f800:50::6ca2:c3e9)2417067117
jihoon.ns.cloudflare.com (2606:4700:58::a29f:2ce9)2417067117

Checks

  • ✓ Serial 2417067117 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 grannbo.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 2417067117 is a Unix timestamp (2046-08-05 07:31 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

25 records at the apex

Found

Read from
162.159.38.150:53
TypeValueTTL
SOAgrannbo.ns.cloudflare.com. dns.cloudflare.com. 2417067117 10000 2400 604800 18001800
NSgrannbo.ns.cloudflare.com.86400
NSjihoon.ns.cloudflare.com.86400
A172.67.72.152300
A104.26.13.121300
A104.26.12.121300
AAAA2606:4700:20::ac43:4898300
AAAA2606:4700:20::681a:d79300
AAAA2606:4700:20::681a:c79300
MX1 aspmx.l.google.com.300
MX10 aspmx2.googlemail.com.300
MX10 aspmx3.googlemail.com.300
MX5 alt1.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
TXT"9ljk5tkor3g43v3qlb9t822b2r"300
TXT"b1jvhocp0a37qhs6k24ieh08jd"300
TXT"brevo-code:7f49297ce3442e2b4a696cf5f7021319"300
TXT"brevo-code:9aabc74388aab89dedeb934bc2d9fb99"300
TXT"google-site-verification=7uU4XSrkj7WHBWq1MreRR2tQPuKLNlFbydDl-8gJpJ8"300
TXT"google-site-verification=TFDdgSxVa-i7EaFx8-ngZJkca3BaYn5yVeCg-ocdbOA"300
TXT"google-site-verification=vm8rbI-SMRcG0hltHYUTsQED5lpADNjin0TwvojlmjI"300
TXT"hubspot-developer-verification=MDU1YjUzZTUtNjI2ZS00YThlLTljZjktNTAyNjcyMTBkMjA3"300
TXT"tipalti-domain-verification=f5ad62a9-de2d-f111-838f-02501973a9c1"300
TXT"v=spf1 a mx ip4:66.216.44.224/27 ip4:209.217.203.160/27 ip4:96.47.67.32/27 ip4:66.193.29.128/27 include:_spf.google.com include:4041721.spf05.hubspotemail.net include:sendgrid.net include:amazonses.com -all"300
TXT"va7mqhb4cr5d6fje975dqh2j21"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 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.
  • 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