skimresources.com

Checked 22 October 2026, 10:43 UTC · via 8.8.8.8
!Passed with warnings
26 passed 1 warning 0 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2028-07-14

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
14 July 2010
Last changed
5 November 2025
Expires
14 July 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns-1402.awsdns-47.org, ns-1785.awsdns-31.co.uk, ns-386.awsdns-48.com, ns-559.awsdns-05.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 2028-07-14 #3
    The registration is valid until 2028-07-14 (631 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-1402.awsdns-47.org, ns-1785.awsdns-31.co.uk, ns-386.awsdns-48.com, ns-559.awsdns-05.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1402.awsdns-47.org, ns-1785.awsdns-31.co.uk, ns-386.awsdns-48.com, ns-559.awsdns-05.net
NS in the zone
ns-1402.awsdns-47.org, ns-1785.awsdns-31.co.uk, ns-386.awsdns-48.com, ns-559.awsdns-05.net
NameserverAddressesNetwork (AS)Glue
ns-1402.awsdns-47.org205.251.197.122 2600:9000:5305:7a00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1785.awsdns-31.co.uk205.251.198.249 2600:9000:5306:f900::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-386.awsdns-48.com205.251.193.130 2600:9000:5301:8200::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.130 2600:9000:5301:8200::1
ns-559.awsdns-05.net205.251.194.47 2600:9000:5302:2f00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1402.awsdns-47.org, ns-1785.awsdns-31.co.uk, ns-386.awsdns-48.com, ns-559.awsdns-05.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-1402.awsdns-47.org 205.251.197.122NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1402.awsdns-47.org 2600:9000:5305:7a00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1785.awsdns-31.co.uk 205.251.198.249NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1785.awsdns-31.co.uk 2600:9000:5306:f900::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-386.awsdns-48.com 205.251.193.130NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-386.awsdns-48.com 2600:9000:5301:8200::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-559.awsdns-05.net 205.251.194.47NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-559.awsdns-05.net 2600:9000:5302:2f00::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-386.awsdns-48.com

Found

Primary (MNAME)
ns-386.awsdns-48.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-1402.awsdns-47.org (205.251.197.122)1
ns-1402.awsdns-47.org (2600:9000:5305:7a00::1)1
ns-1785.awsdns-31.co.uk (205.251.198.249)1
ns-1785.awsdns-31.co.uk (2600:9000:5306:f900::1)1
ns-386.awsdns-48.com (205.251.193.130)1
ns-386.awsdns-48.com (2600:9000:5301:8200::1)1
ns-559.awsdns-05.net (205.251.194.47)1
ns-559.awsdns-05.net (2600:9000:5302:2f00::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-386.awsdns-48.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

info

15 records at the apex

Found

Read from
205.251.197.122:53
TypeValueTTL
SOAns-386.awsdns-48.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 8640060
NSns-1402.awsdns-47.org.86400
NSns-1785.awsdns-31.co.uk.86400
NSns-386.awsdns-48.com.86400
NSns-559.awsdns-05.net.86400
A35.190.25.30600
MX1 aspmx.l.google.com.600
MX10 aspmx2.googlemail.com.600
MX10 aspmx3.googlemail.com.600
MX5 alt1.aspmx.l.google.com.600
MX5 alt2.aspmx.l.google.com.600
TXT"_globalsign-domain-verification=DYSe8WTKTkfCLFHcaCVKfNOfEG2E6Zvcxxd8po4XA4"600
TXT"_globalsign-domain-verification=pnR_dqNYlYxgDSopdCuncWRWJ6bXQAJZ15ep7gpMiU"600
TXT"google-site-verification=mykkZFE_GvtXQa_FD8wxBaLQAcuc2Vi1fel9j_gguCU"600
TXT"google-site-verification=vkQMCNRrXOYM3Jrb3RSgmkfgt5vmDXTK0W4tM9LAV8o"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, 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.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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