wkbw.com

Checked 22 October 2026, 11:32 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-05-10

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
9 May 1995
Last changed
8 April 2026
Expires
10 May 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns-1453.awsdns-53.org, ns-1789.awsdns-31.co.uk, ns-328.awsdns-41.com, ns-563.awsdns-06.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 2027-05-10 #3
    The registration is valid until 2027-05-10 (199 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

ns-1453.awsdns-53.org, ns-1789.awsdns-31.co.uk, ns-328.awsdns-41.com, ns-563.awsdns-06.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1453.awsdns-53.org, ns-1789.awsdns-31.co.uk, ns-328.awsdns-41.com, ns-563.awsdns-06.net
NS in the zone
ns-1453.awsdns-53.org, ns-1789.awsdns-31.co.uk, ns-328.awsdns-41.com, ns-563.awsdns-06.net
NameserverAddressesNetwork (AS)Glue
ns-1453.awsdns-53.org205.251.197.173 2600:9000:5305:ad00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1789.awsdns-31.co.uk205.251.198.253 2600:9000:5306:fd00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-328.awsdns-41.com205.251.193.72 2600:9000:5301:4800::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.72 2600:9000:5301:4800::1
ns-563.awsdns-06.net205.251.194.51 2600:9000:5302:3300::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1453.awsdns-53.org, ns-1789.awsdns-31.co.uk, ns-328.awsdns-41.com, ns-563.awsdns-06.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-1453.awsdns-53.org 205.251.197.173NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1453.awsdns-53.org 2600:9000:5305:ad00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1789.awsdns-31.co.uk 205.251.198.253NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1789.awsdns-31.co.uk 2600:9000:5306:fd00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-328.awsdns-41.com 205.251.193.72NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-328.awsdns-41.com 2600:9000:5301:4800::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-563.awsdns-06.net 205.251.194.51NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-563.awsdns-06.net 2600:9000:5302:3300::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-328.awsdns-41.com

Found

Primary (MNAME)
ns-328.awsdns-41.com
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-1453.awsdns-53.org (205.251.197.173)1
ns-1453.awsdns-53.org (2600:9000:5305:ad00::1)1
ns-1789.awsdns-31.co.uk (205.251.198.253)1
ns-1789.awsdns-31.co.uk (2600:9000:5306:fd00::1)1
ns-328.awsdns-41.com (205.251.193.72)1
ns-328.awsdns-41.com (2600:9000:5301:4800::1)1
ns-563.awsdns-06.net (205.251.194.51)1
ns-563.awsdns-06.net (2600:9000:5302:3300::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-328.awsdns-41.com 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

25 records at the apex

Found

Read from
205.251.197.173:53
TypeValueTTL
SOAns-328.awsdns-41.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1453.awsdns-53.org.172800
NSns-1789.awsdns-31.co.uk.172800
NSns-328.awsdns-41.com.172800
NSns-563.awsdns-06.net.172800
A52.222.214.5560
A52.222.214.860
A52.222.214.9760
A52.222.214.11460
MX10 mxa-0028be01.gslb.pphosted.com.300
MX10 mxb-0028be01.gslb.pphosted.com.300
TXT"MS=ms66930077"300
TXT"ZOOM_verify_zCHQQ3dAQReacapB9tb1Bw"300
TXT"adobe-idp-site-verification=34d4340e24012be3f1c3106a0788aa9abf31948bf24cd37eadcf081367cf1687"300
TXT"airtable-verification=0ad23da81fc0566a1a6d354b90be7b6f"300
TXT"apple-domain-verification=Zp6vpXewW6sfyKIV"300
TXT"canva-site-verification=0r4S0CNoSjDxg6DUWc_Weg"300
TXT"dropbox-domain-verification=qlvdi7o4bxhx"300
TXT"elevenlabs=nivkJpIURxAbVMA5VOu9IVHcLwC4AOYU52MgfXZ8PkM"300
TXT"facebook-domain-verification=qxskhkig3pc59gdmc691zyqgu8m3rn"300
TXT"google-site-verification=GtQStC1ExuEvcg903JcNRh0aon3Ib3lYTlTeGrUvCk0"300
TXT"smartsheet-site-validation=igZDzqMtOWUJST-Yk4vqXt98ppx1CZS_"300
TXT"teamviewer-sso-verification=b83577ce978046909ae285a098d537b7"300
TXT"traction-guest=e7f75f04-35c8-4f94-8192-2d46d82fad45"300
TXT"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all"300

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.
    #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