mentalfloss.com

Checked 22 October 2026, 09:50 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · GoDaddy.com, LLC · expires 2027-04-10

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
GoDaddy.com, LLC
Registered
9 April 1996
Last changed
10 April 2026
Expires
10 April 2027
Status
client delete prohibited, client renew prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns-127.awsdns-15.com, ns-1355.awsdns-41.org, ns-1783.awsdns-30.co.uk, ns-856.awsdns-43.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 2027-04-10 #3
    The registration is valid until 2027-04-10 (169 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

ns-127.awsdns-15.com, ns-1355.awsdns-41.org, ns-1783.awsdns-30.co.uk, ns-856.awsdns-43.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-127.awsdns-15.com, ns-1355.awsdns-41.org, ns-1783.awsdns-30.co.uk, ns-856.awsdns-43.net
NS in the zone
ns-127.awsdns-15.com, ns-1355.awsdns-41.org, ns-1783.awsdns-30.co.uk, ns-856.awsdns-43.net
NameserverAddressesNetwork (AS)Glue
ns-127.awsdns-15.com205.251.192.127 2600:9000:5300:7f00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.192.127 2600:9000:5300:7f00::1
ns-1355.awsdns-41.org205.251.197.75 2600:9000:5305:4b00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1783.awsdns-30.co.uk205.251.198.247 2600:9000:5306:f700::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-856.awsdns-43.net205.251.195.88 2600:9000:5303:5800::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-127.awsdns-15.com, ns-1355.awsdns-41.org, ns-1783.awsdns-30.co.uk, ns-856.awsdns-43.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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-127.awsdns-15.com 205.251.192.127NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-127.awsdns-15.com 2600:9000:5300:7f00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1355.awsdns-41.org 205.251.197.75NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1355.awsdns-41.org 2600:9000:5305:4b00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1783.awsdns-30.co.uk 205.251.198.247NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1783.awsdns-30.co.uk 2600:9000:5306:f700::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-856.awsdns-43.net 205.251.195.88NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-856.awsdns-43.net 2600:9000:5303:5800::1NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 1 · primary ns-1355.awsdns-41.org

Found

Primary (MNAME)
ns-1355.awsdns-41.org
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-127.awsdns-15.com (205.251.192.127)1
ns-127.awsdns-15.com (2600:9000:5300:7f00::1)1
ns-1355.awsdns-41.org (205.251.197.75)1
ns-1355.awsdns-41.org (2600:9000:5305:4b00::1)1
ns-1783.awsdns-30.co.uk (205.251.198.247)1
ns-1783.awsdns-30.co.uk (2600:9000:5306:f700::1)1
ns-856.awsdns-43.net (205.251.195.88)1
ns-856.awsdns-43.net (2600:9000:5303:5800::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-1355.awsdns-41.org is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

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

warn

26 records at the apex

Found

Read from
205.251.192.127:53
TypeValueTTL
SOAns-1355.awsdns-41.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-127.awsdns-15.com.3600
NSns-1355.awsdns-41.org.3600
NSns-1783.awsdns-30.co.uk.3600
NSns-856.awsdns-43.net.3600
A44.241.188.2460
A35.83.190.22560
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"MS=ms12917153"3600
TXT"bpjjzh8yhgm6n0y9437fbz52gs9j0lph"3600
TXT"brevo-code:25bd81de5f53ea7ec3c6b9f3e71ef018"3600
TXT"facebook-domain-verification=8p8k8s86fzfb5d2g2zq15818aj4u62"3600
TXT"google-site-verification=Cl1nAqp5GlOLDdnSAS1Dg2wyIVilb76SZ9B43NKBFls"3600
TXT"google-site-verification=LV6dh4kX-YtEkDCh-SiewnGyNcWjwOCaVGPrtIrL2bE"3600
TXT"google-site-verification=PwHgWMzA1M9ET0l3j0Rla5nCyb02HTa1oLSN5OXUVaQ"3600
TXT"google-site-verification=fgC5-DxY6HvFT8fM0SiUAhdq8SDSuE1zvW0HpdlwdgA"3600
TXT"google-site-verification=g19BQLQaGVGFsp9S--Nux-0AjT79KfOYJdpjnEKsA9c"3600
TXT"google-site-verification=y-SZX1wXDfAt3K_CF7Fl9gbGYUpxXQ96TY7zGK14oSQ"3600
TXT"google-site-verification=z4YHNPYC5G4ehxb4caJGpn3jv1vGdOVgZYa1EGw8j-Q"3600
TXT"v=DMARC1; p=reject; rua=mailto:postmaster@solarmora.com, mailto:dmarc@solarmora.com"3600
TXT"v=spf1 include:aspmx.sailthru.com include:_spf.google.com include:mail.zendesk.com ~all"3600
TXT"yahoo-verification-key=lyoqSKYVgsjW3xJbQlCFP/nMpIN/jC4gtPPkVLfh+OY="3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1h; resolvers may use either.
    #32
  • ✓ 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