merriam-webster.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 · CSC Corporate Domains, Inc. · expires 2027-02-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
8 February 1999
Last changed
4 February 2026
Expires
8 February 2027
Status
client transfer prohibited
Registry nameservers
ns-1084.awsdns-07.org, ns-1998.awsdns-57.co.uk, ns-323.awsdns-40.com, ns-636.awsdns-15.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 2027-02-08 #3
    The registration is valid until 2027-02-08 (108 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

ns-1084.awsdns-07.org, ns-1998.awsdns-57.co.uk, ns-323.awsdns-40.com, ns-636.awsdns-15.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1084.awsdns-07.org, ns-1998.awsdns-57.co.uk, ns-323.awsdns-40.com, ns-636.awsdns-15.net
NS in the zone
ns-1084.awsdns-07.org, ns-1998.awsdns-57.co.uk, ns-323.awsdns-40.com, ns-636.awsdns-15.net
NameserverAddressesNetwork (AS)Glue
ns-1084.awsdns-07.org205.251.196.60 2600:9000:5304:3c00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1998.awsdns-57.co.uk205.251.199.206 2600:9000:5307:ce00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-323.awsdns-40.com205.251.193.67 2600:9000:5301:4300::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.67 2600:9000:5301:4300::1
ns-636.awsdns-15.net205.251.194.124 2600:9000:5302:7c00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1084.awsdns-07.org, ns-1998.awsdns-57.co.uk, ns-323.awsdns-40.com, ns-636.awsdns-15.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-1084.awsdns-07.org 205.251.196.60NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1084.awsdns-07.org 2600:9000:5304:3c00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1998.awsdns-57.co.uk 205.251.199.206NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1998.awsdns-57.co.uk 2600:9000:5307:ce00::1NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns-323.awsdns-40.com 205.251.193.67NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-323.awsdns-40.com 2600:9000:5301:4300::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-636.awsdns-15.net 205.251.194.124NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-636.awsdns-15.net 2600:9000:5302:7c00::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-636.awsdns-15.net

Found

Primary (MNAME)
ns-636.awsdns-15.net
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-1084.awsdns-07.org (205.251.196.60)1
ns-1084.awsdns-07.org (2600:9000:5304:3c00::1)1
ns-1998.awsdns-57.co.uk (205.251.199.206)1
ns-1998.awsdns-57.co.uk (2600:9000:5307:ce00::1)1
ns-323.awsdns-40.com (205.251.193.67)1
ns-323.awsdns-40.com (2600:9000:5301:4300::1)1
ns-636.awsdns-15.net (205.251.194.124)1
ns-636.awsdns-15.net (2600:9000:5302:7c00::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-636.awsdns-15.net 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

23 records at the apex

Found

Read from
205.251.196.60:53
TypeValueTTL
SOAns-636.awsdns-15.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1084.awsdns-07.org.172800
NSns-1998.awsdns-57.co.uk.172800
NSns-323.awsdns-40.com.172800
NSns-636.awsdns-15.net.172800
A54.192.35.860
A54.192.35.9360
A54.192.35.1060
A54.192.35.8860
AAAA2600:9000:213f:d600:c:3d32:e340:93a160
AAAA2600:9000:213f:3200:c:3d32:e340:93a160
AAAA2600:9000:2130:7a00:c:3d32:e340:93a160
AAAA2600:9000:213f:c600:c:3d32:e340:93a160
AAAA2600:9000:2130:3800:c:3d32:e340:93a160
AAAA2600:9000:2130:9200:c:3d32:e340:93a160
AAAA2600:9000:2130:400:c:3d32:e340:93a160
AAAA2600:9000:213f:3e00:c:3d32:e340:93a160
MX1 smtp.google.com.60
TXT"google-site-verification=0P7lGsk2k9lYPZzfPtMQ65anErIqEaDKEB5s5SA-wjA"180
TXT"google-site-verification=QFIo-DJEb2h-NnAkKfbngucTyIPtJLkdhiK9nI-icWo"180
TXT"google-site-verification=S4yVMtexKSScdrR1yYa25BvuqJmWnB6MudoXTyEEFU0"180
TXT"google-site-verification=yhZNYrftQlDsh_3oIQsAxUkrnWJCsa3pgxqnlBS3aIw"180
TXT"v=spf1 include:_spf.google.com include:sendgrid.net ~all"180

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), AAAA (1m), MX (1m). Low TTLs are useful just before a planned change.
    #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