studocu.com

Checked 22 October 2026, 10:52 UTC · via 8.8.8.8
!Passed with warnings
27 passed 2 warnings 0 failed 2 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2029-09-16

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
16 September 2013
Last changed
5 June 2024
Expires
16 September 2029
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns-1068.awsdns-05.org, ns-1563.awsdns-03.co.uk, ns-375.awsdns-46.com, ns-707.awsdns-24.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 2029-09-16 #3
    The registration is valid until 2029-09-16 (1059 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns-1068.awsdns-05.org, ns-1563.awsdns-03.co.uk, ns-375.awsdns-46.com, ns-707.awsdns-24.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1068.awsdns-05.org, ns-1563.awsdns-03.co.uk, ns-375.awsdns-46.com, ns-707.awsdns-24.net
NS in the zone
ns-1068.awsdns-05.org, ns-1563.awsdns-03.co.uk, ns-375.awsdns-46.com, ns-707.awsdns-24.net
NameserverAddressesNetwork (AS)Glue
ns-1068.awsdns-05.org205.251.196.44 2600:9000:5304:2c00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1563.awsdns-03.co.uk205.251.198.27 2600:9000:5306:1b00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-375.awsdns-46.com205.251.193.119 2600:9000:5301:7700::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.119 2600:9000:5301:7700::1
ns-707.awsdns-24.net205.251.194.195 2600:9000:5302:c300::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1068.awsdns-05.org, ns-1563.awsdns-03.co.uk, ns-375.awsdns-46.com, ns-707.awsdns-24.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-1068.awsdns-05.org 205.251.196.44NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1068.awsdns-05.org 2600:9000:5304:2c00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1563.awsdns-03.co.uk 205.251.198.27NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1563.awsdns-03.co.uk 2600:9000:5306:1b00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-375.awsdns-46.com 205.251.193.119NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-375.awsdns-46.com 2600:9000:5301:7700::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-707.awsdns-24.net 205.251.194.195NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-707.awsdns-24.net 2600:9000:5302:c300::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-707.awsdns-24.net

Found

Primary (MNAME)
ns-707.awsdns-24.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-1068.awsdns-05.org (205.251.196.44)1
ns-1068.awsdns-05.org (2600:9000:5304:2c00::1)1
ns-1563.awsdns-03.co.uk (205.251.198.27)1
ns-1563.awsdns-03.co.uk (2600:9000:5306:1b00::1)1
ns-375.awsdns-46.com (205.251.193.119)1
ns-375.awsdns-46.com (2600:9000:5301:7700::1)1
ns-707.awsdns-24.net (205.251.194.195)1
ns-707.awsdns-24.net (2600:9000:5302:c300::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-707.awsdns-24.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

36 records at the apex

Found

Read from
205.251.196.44:53
TypeValueTTL
SOAns-707.awsdns-24.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1068.awsdns-05.org.3600
NSns-1563.awsdns-03.co.uk.3600
NSns-375.awsdns-46.com.3600
NSns-707.awsdns-24.net.3600
A52.207.8.13860
A98.85.166.14660
A34.230.214.24660
MX1 aspmx.l.google.com.86400
MX10 alt3.aspmx.l.google.com.86400
MX10 alt4.aspmx.l.google.com.86400
MX5 alt1.aspmx.l.google.com.86400
MX5 alt2.aspmx.l.google.com.86400
TXT"ahrefs-site-verification_a69a5c7e0cf8d330a60d94b186c862c6814019cb36c1c358e37d5ee7b1a5d1ed"86400
TXT"apple-domain-verification=HSVTdfFWvsHqaq9F"86400
TXT"cursor-domain-verification-mt7y30=DT1tXSvzSP55ybZz8EPZY4upW"86400
TXT"digicert-verification=_vi4698wzvlf1brs063rprsvxl0dmoqx"86400
TXT"facebook-domain-verification=f5xuglmud6k53m61td8gppkh4g4058"86400
TXT"google-site-verification=2HBHIAqinuaIk8ZJde0g2Cy8jxG_QA4NpukPZfTQKSI"86400
TXT"google-site-verification=NxpLqsW22V_Qyq4oZ5ko-F4s0fWKuGJcZVre2XeXOvo"86400
TXT"google-site-verification=xhQG6tV0EZnwZK2JVXzFsLbMwWrsTCgGNPrG-L1pIqE"86400
TXT"mixpanel-domain-verify=091f4b5d-e1d9-46cf-aac1-07d88ebccb69"86400
TXT"openai-domain-verification=dv-Eg6ycY7wxlPSalJAiopsgGgW"86400
TXT"pinterest-site-verification=adec26a8fe07f712851f953c850e9b15"86400
TXT"segment-site-verification=TDVou4tglnhtuX2bwrZwiNCmIk9kkwYp"86400
TXT"tiktok-developers-site-verification=O8xqv6ccZRmf6S108TI6PXxw6nZFMWqt"86400
TXT"tiktok-developers-site-verification=cL91krwa1oHDYSboin7MZeiOfswmdGA0"86400
TXT"v=MCPv1; k=ed25519; p=pwKzSh5L06DjMHN496/ZZ1Les2dPp6cQu02UQmiJaE4="86400
TXT"v=spf1 a mx include:mail.zendesk.com include:_spf.google.com -all"86400
CAA0 iodef "mailto:security@studocu.com"86400
CAA0 issue "amazon.com"86400
CAA0 issue "digicert.com"86400
CAA0 issue "letsencrypt.org"86400
CAA0 issue "pki.goog"86400
CAA0 issue "sectigo.com"86400
CAA0 issue "ssl.com"86400

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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, digicert.com, letsencrypt.org, pki.goog, sectigo.com, ssl.com.