tinyletter.com

Checked 22 October 2026, 11:10 UTC · via 8.8.8.8
!Passed with warnings
25 passed 3 warnings 0 failed 3 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2031-10-20

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
20 October 2010
Last changed
7 August 2024
Expires
20 October 2031
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
a1-205.akam.net, a14-66.akam.net, a4-65.akam.net, a5-65.akam.net, a6-66.akam.net, a7-66.akam.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 2031-10-20 #3
    The registration is valid until 2031-10-20 (1824 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

a1-205.akam.net, a14-66.akam.net, a4-65.akam.net, a5-65.akam.net, a6-66.akam.net, a7-66.akam.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
a1-205.akam.net, a14-66.akam.net, a4-65.akam.net, a5-65.akam.net, a6-66.akam.net, a7-66.akam.net
NS in the zone
a1-205.akam.net, a14-66.akam.net, a4-65.akam.net, a5-65.akam.net, a6-66.akam.net, a7-66.akam.net
NameserverAddressesNetwork (AS)Glue
a1-205.akam.net193.108.91.205 2600:1401:2::cdAS20940 AKAMAI-ASN1 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a14-66.akam.net184.26.161.66 2600:1480:1800::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a4-65.akam.net72.246.46.65 2600:1480:9000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a5-65.akam.net95.100.168.65 2600:1480:b000::41AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a6-66.akam.net23.211.133.66 2600:1401:1::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-
a7-66.akam.net23.61.199.66 2600:1406:32::42AS21342 AKAMAI-ASN2 - Akamai International B.V., NL AS21342 AKAMAI-ASN2 - Akamai International B.V., NL-

Checks

  • ✓ 6 nameservers #6
    Delegated to a1-205.akam.net, a14-66.akam.net, a4-65.akam.net, a5-65.akam.net, a6-66.akam.net, a7-66.akam.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 6 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20940 (AKAMAI-ASN1 - Akamai International B.V., NL): 1 address; AS21342 (AKAMAI-ASN2 - Akamai International B.V., NL): 11 addresses.
  • i
    All nameserver names under .net
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
a1-205.akam.net 193.108.91.205NOERROR, 5 ms, authoritativenoyes / yesrefused41824.11
a1-205.akam.net 2600:1401:2::cdNOERROR, 4 ms, authoritativenoyes / yesrefused41824.6
a14-66.akam.net 184.26.161.66NOERROR, 4 ms, authoritativenoyes / yesrefused48878.29
a14-66.akam.net 2600:1480:1800::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.29
a4-65.akam.net 72.246.46.65NOERROR, 4 ms, authoritativenoyes / yesrefused48878.31
a4-65.akam.net 2600:1480:9000::41NOERROR, 4 ms, authoritativenoyes / yesrefused48878.33
a5-65.akam.net 95.100.168.65NOERROR, 5 ms, authoritativenoyes / yesrefused41824.8
a5-65.akam.net 2600:1480:b000::41NOERROR, 4 ms, authoritativenoyes / yesrefused41824.5
a6-66.akam.net 23.211.133.66NOERROR, 6 ms, authoritativenoyes / yesrefused48878.26
a6-66.akam.net 2600:1401:1::42NOERROR, 4 ms, authoritativenoyes / yesrefused48878.29
a7-66.akam.net 23.61.199.66NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11
a7-66.akam.net 2600:1406:32::42NOERROR, 4 ms, authoritativenoyes / yesrefused41824.11

Checks

  • ✓ All respond #14
    All 12 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-205.akam.net: "41824.11"; a1-205.akam.net: "41824.6"; a14-66.akam.net: "48878.29"; a4-65.akam.net: "48878.31"; a4-65.akam.net: "48878.33"; a5-65.akam.net: "41824.8"; a5-65.akam.net: "41824.5"; a6-66.akam.net: "48878.26"; a6-66.akam.net: "48878.29"; a7-66.akam.net: "41824.11". Hide or replace the version string.
    #17
  • ✓ 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 2015121420 · primary a1-205.akam.net

Found

Primary (MNAME)
a1-205.akam.net
Contact (RNAME)
domains.mailchimp.com
Serial
2015121420
Refresh / retry
10800 s / 3600 s
Expire
1209600 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
a1-205.akam.net (193.108.91.205)2015121420
a1-205.akam.net (2600:1401:2::cd)2015121420
a14-66.akam.net (184.26.161.66)2015121420
a14-66.akam.net (2600:1480:1800::42)2015121420
a4-65.akam.net (72.246.46.65)2015121420
a4-65.akam.net (2600:1480:9000::41)2015121420
a5-65.akam.net (95.100.168.65)2015121420
a5-65.akam.net (2600:1480:b000::41)2015121420
a6-66.akam.net (23.211.133.66)2015121420
a6-66.akam.net (2600:1401:1::42)2015121420
a7-66.akam.net (23.61.199.66)2015121420
a7-66.akam.net (2600:1406:32::42)2015121420

Checks

  • ✓ Serial 2015121420 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 14d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver a1-205.akam.net is one of the listed nameservers.
  • ✓ Contact domains@mailchimp.com #25
    The SOA RNAME domains.mailchimp.com means domains@mailchimp.com.
  • ✓ Date-based serial #26
    The serial 2015121420 follows the YYYYMMDDnn convention (2015-12-14).

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

15 records at the apex

Found

Read from
193.108.91.205:53
TypeValueTTL
SOAa1-205.akam.net. domains.mailchimp.com. 2015121420 10800 3600 1209600 600300
NSa6-66.akam.net.300
NSa1-205.akam.net.300
NSa5-65.akam.net.300
NSa14-66.akam.net.300
NSa4-65.akam.net.300
NSa7-66.akam.net.300
A2.16.206.2320
A2.16.206.1320
AAAA2a02:26f0:b700:8::210:ce4620
AAAA2a02:26f0:b700:8::210:ce5220
MX20 9656349.in2.mandrillapp.com.600
MX10 9656349.in1.mandrillapp.com.600
TXT"v=spf1 include:_spf.google.com include:spf.mandrillapp.com ~all"300
TXT"digicert: h096snd3h6g3xqckn86vn7yddfzwtfp5"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 5m; 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.
  • 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