varsitytutors.com

Checked 22 October 2026, 11:20 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 0 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-05-07

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
7 May 2007
Last changed
20 March 2018
Expires
7 May 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns-1196.awsdns-21.org, ns-161.awsdns-20.com, ns-1692.awsdns-19.co.uk, ns-922.awsdns-51.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 2027-05-07 #3
    The registration is valid until 2027-05-07 (196 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-1196.awsdns-21.org, ns-161.awsdns-20.com, ns-1692.awsdns-19.co.uk, ns-922.awsdns-51.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1196.awsdns-21.org, ns-161.awsdns-20.com, ns-1692.awsdns-19.co.uk, ns-922.awsdns-51.net
NS in the zone
ns-1196.awsdns-21.org, ns-161.awsdns-20.com, ns-1692.awsdns-19.co.uk, ns-922.awsdns-51.net
NameserverAddressesNetwork (AS)Glue
ns-1196.awsdns-21.org205.251.196.172 2600:9000:5304:ac00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-161.awsdns-20.com205.251.192.161 2600:9000:5300:a100::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.192.161 2600:9000:5300:a100::1
ns-1692.awsdns-19.co.uk205.251.198.156 2600:9000:5306:9c00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-922.awsdns-51.net205.251.195.154 2600:9000:5303:9a00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1196.awsdns-21.org, ns-161.awsdns-20.com, ns-1692.awsdns-19.co.uk, ns-922.awsdns-51.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-1196.awsdns-21.org 205.251.196.172NOERROR, 72 ms, authoritativenoyes / yesrefused-
ns-1196.awsdns-21.org 2600:9000:5304:ac00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-161.awsdns-20.com 205.251.192.161NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-161.awsdns-20.com 2600:9000:5300:a100::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1692.awsdns-19.co.uk 205.251.198.156NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1692.awsdns-19.co.uk 2600:9000:5306:9c00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-922.awsdns-51.net 205.251.195.154NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-922.awsdns-51.net 2600:9000:5303:9a00::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-1692.awsdns-19.co.uk

Found

Primary (MNAME)
ns-1692.awsdns-19.co.uk
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-1196.awsdns-21.org (205.251.196.172)1
ns-1196.awsdns-21.org (2600:9000:5304:ac00::1)1
ns-161.awsdns-20.com (205.251.192.161)1
ns-161.awsdns-20.com (2600:9000:5300:a100::1)1
ns-1692.awsdns-19.co.uk (205.251.198.156)1
ns-1692.awsdns-19.co.uk (2600:9000:5306:9c00::1)1
ns-922.awsdns-51.net (205.251.195.154)1
ns-922.awsdns-51.net (2600:9000:5303:9a00::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-1692.awsdns-19.co.uk 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

39 records at the apex

Found

Read from
205.251.196.172:53
TypeValueTTL
SOAns-1692.awsdns-19.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1196.awsdns-21.org.172800
NSns-161.awsdns-20.com.172800
NSns-1692.awsdns-19.co.uk.172800
NSns-922.awsdns-51.net.172800
A54.149.86.7860
A44.227.234.5060
MX1 aspmx.l.google.com.1800
MX10 aspmx2.googlemail.com.1800
MX5 alt1.aspmx.l.google.com.1800
MX5 alt2.aspmx.l.google.com.1800
TXT"2h5h7p1bcw8yp00hsvckq25527vfzzwp"60
TXT"45341150.spf01.hubspotemail.net"60
TXT"MS=B52DC7A138FB0570B282BE2352077B88B333B338"60
TXT"MS=ms26300984"60
TXT"TAILSCALE-9xqUetQVsLIV4dKqRH40"60
TXT"anthropic-domain-verification-s4q2vw=fCczHgCoeREOojRMXIeEVLlM5"60
TXT"apple-domain-verification=A20b2GfpBOhdrgS6"60
TXT"atlassian-domain-verification=EzZqRwnaZYS78m5K07TTJcg8Bw0nTApRM2CTw4XxWmx/Su3eA+bb8LXAjkq38BNb"60
TXT"atlassian-sending-domain-verification=622f5890-2aef-4344-bd5c-7df6f57255e5"60
TXT"cursor-domain-verification-pkvwbk=h9x8iFRr14HFRegoM9bNSrsIR"60
TXT"dropbox-domain-verification=9r2i5hrvtx1t"60
TXT"facebook-domain-verification=ewbes8g25b99k91odsi6wrmdtpddkq"60
TXT"google-site-verification=JG2vca4-xXVL8DQd-cw7my3EnEdIogWyOqO-YhE5kKw"60
TXT"google-site-verification=PJ-yF5wMQWIP8JiRNff1csfNXI9brHMv_ZkUSPJqiMw"60
TXT"google-site-verification=X4bZ5oWp_4llQBE2vXrKnGw5H8Jpxp54dze4OYkWqg4"60
TXT"google-site-verification=ZPNCG4kQeM7fSiIXu8FIJ3JMzhtXH24--tS2ZX30umY"60
TXT"google-site-verification=bUY6eGFDqg3Xdes51xO8uU-ti52PJrEocZtAtC_P0fo"60
TXT"google-site-verification=fMpbXBZbokt6KDTWEGEYhr1EbZ3sNQJ4hrGolC2qmlU"60
TXT"google-site-verification=iGiqL8HcfLY-7LMT-w1DT3dsAvgNoxvcveNach_2fJE"60
TXT"google-site-verification=mTnKbLytkmcVdRa-jceqLWkOkzHnsrX6I5B8inWsJO4"60
TXT"google-site-verification=n-AjN10tE0fPniUEAsFerHAB3bSJZeT9LJjkGD37D68"60
TXT"lb3cjcq5qs25dyfbfln4971qnndb64xy"60
TXT"pardot1004972=bd685e5a7f2fe0ce8088ab2a4cbd92aebcba439360e66e5bc14753536bf43428"60
TXT"proxy-ssl.webflow.com"60
TXT"slack-domain-verification=7gDfnEFZGrLk2eWw2xJ5InfgoPoEikceCbPe1vXP"60
TXT"stripe-verification=462e1135a6a43e7772c82298762f9a24bf6ca1772ea165a949fdea1591d69d45"60
TXT"v=spf1 a ip4:216.12.129.78 ip4:216.12.149.100 mx include:sendgrid.net include:mail.zendesk.com include:_spf.google.com include:spf.mandrillapp.com include:45341150.spf01.hubspotemail.net ~all"60
TXT"y2ptc039sh9ldk2lgd08zrzbfzs4l8p8"60

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.
  • 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