numerama.com

Checked 22 October 2026, 10:04 UTC · via 8.8.8.8
!Passed with warnings
27 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · Gandi SAS · expires 2031-02-16

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Gandi SAS
Registered
16 February 2004
Last changed
4 March 2026
Expires
16 February 2031
Status
client transfer prohibited
Registry nameservers
josh.ns.cloudflare.com, uma.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 2031-02-16 #3
    The registration is valid until 2031-02-16 (1578 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

josh.ns.cloudflare.com, uma.ns.cloudflare.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
josh.ns.cloudflare.com, uma.ns.cloudflare.com
NS in the zone
josh.ns.cloudflare.com, uma.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
josh.ns.cloudflare.com172.64.33.126 173.245.59.126 108.162.193.126 2606:4700:58::adf5:3b7e 2a06:98c1:50::ac40:217e 2803:f800:50::6ca2:c17eAS13335 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., US108.162.193.126 172.64.33.126 173.245.59.126 2606:4700:58::adf5:3b7e 2803:f800:50::6ca2:c17e 2a06:98c1:50::ac40:217e
uma.ns.cloudflare.com173.245.58.146 108.162.192.146 172.64.32.146 2606:4700:50::adf5:3a92 2a06:98c1:50::ac40:2092 2803:f800:50::6ca2:c092AS13335 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., US108.162.192.146 172.64.32.146 173.245.58.146 2606:4700:50::adf5:3a92 2803:f800:50::6ca2:c092 2a06:98c1:50::ac40:2092

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: josh.ns.cloudflare.com, uma.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
josh.ns.cloudflare.com 172.64.33.126NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
josh.ns.cloudflare.com 173.245.59.126NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
josh.ns.cloudflare.com 108.162.193.126NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
josh.ns.cloudflare.com 2606:4700:58::adf5:3b7eNOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
josh.ns.cloudflare.com 2a06:98c1:50::ac40:217eNOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
josh.ns.cloudflare.com 2803:f800:50::6ca2:c17eNOERROR, 8 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 173.245.58.146NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 108.162.192.146NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 172.64.32.146NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 2606:4700:50::adf5:3a92NOERROR, 5 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 2a06:98c1:50::ac40:2092NOERROR, 6 ms, authoritativenoyes / yesrefused2026.10.2
uma.ns.cloudflare.com 2803:f800:50::6ca2:c092NOERROR, 6 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: josh.ns.cloudflare.com: "2026.10.2"; uma.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 2417441156 · primary josh.ns.cloudflare.com

Found

Primary (MNAME)
josh.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417441156
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
josh.ns.cloudflare.com (172.64.33.126)2417441156
josh.ns.cloudflare.com (173.245.59.126)2417441156
josh.ns.cloudflare.com (108.162.193.126)2417441156
josh.ns.cloudflare.com (2606:4700:58::adf5:3b7e)2417441156
josh.ns.cloudflare.com (2a06:98c1:50::ac40:217e)2417441156
josh.ns.cloudflare.com (2803:f800:50::6ca2:c17e)2417441156
uma.ns.cloudflare.com (173.245.58.146)2417441156
uma.ns.cloudflare.com (108.162.192.146)2417441156
uma.ns.cloudflare.com (172.64.32.146)2417441156
uma.ns.cloudflare.com (2606:4700:50::adf5:3a92)2417441156
uma.ns.cloudflare.com (2a06:98c1:50::ac40:2092)2417441156
uma.ns.cloudflare.com (2803:f800:50::6ca2:c092)2417441156

Checks

  • ✓ Serial 2417441156 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 josh.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 2417441156 is a Unix timestamp (2046-08-09 15:25 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 09:04 UTC and expires at 2026-10-23 11:04 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

pass

29 records at the apex

Found

Read from
172.64.33.126:53
TypeValueTTL
SOAjosh.ns.cloudflare.com. dns.cloudflare.com. 2417441156 10000 2400 604800 18001800
NSjosh.ns.cloudflare.com.86400
NSuma.ns.cloudflare.com.86400
A104.26.15.117300
A172.67.73.247300
A104.26.14.117300
AAAA2606:4700:20::681a:f75300
AAAA2606:4700:20::ac43:49f7300
AAAA2606:4700:20::681a:e75300
MX1 aspmx.l.google.com.3600
MX10 aspmx2.googlemail.com.3600
MX10 aspmx3.googlemail.com.3600
MX5 alt1.aspmx.l.google.com.3600
MX5 alt2.aspmx.l.google.com.3600
TXT"facebook-domain-verification=himlc8fkcgydtz9rfesl48urmb75pd"300
TXT"google-site-verification=42hY8uv8eE6fRy9RKe4oCb57v9u5BpHaXqXpHrS-HPM"300
TXT"google-site-verification=8liBv2GyNHl96ac39ON4lBUQSNt4PiZesB1ek3QniqA"300
TXT"google-site-verification=LKm_COPptY5NkSaoXMZ3xfhW8i_OSpY9BXduxzq9DDs"300
TXT"v=spf1 include:spf.mailjet.com include:servers.mcsv.net include:amazonses.com include:_spf.google.com mx a -all"300
CAA0 issue "comodoca.com"3600
CAA0 issue "digicert.com; cansignhttpexchanges=yes"3600
CAA0 issue "letsencrypt.org"3600
CAA0 issue "pki.goog; cansignhttpexchanges=yes"3600
CAA0 issue "ssl.com"3600
CAA0 issuewild "comodoca.com"3600
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"3600
CAA0 issuewild "letsencrypt.org"3600
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"3600
CAA0 issuewild "ssl.com"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 1h, 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: comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.