techworld.com

Checked 22 October 2026, 11:00 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-02-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
7 February 1997
Last changed
7 January 2026
Expires
8 February 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns-1302.awsdns-34.org, ns-1876.awsdns-42.co.uk, ns-435.awsdns-54.com, ns-692.awsdns-22.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 2027-02-08 #3
    The registration is valid until 2027-02-08 (108 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-1302.awsdns-34.org, ns-1876.awsdns-42.co.uk, ns-435.awsdns-54.com, ns-692.awsdns-22.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1302.awsdns-34.org, ns-1876.awsdns-42.co.uk, ns-435.awsdns-54.com, ns-692.awsdns-22.net
NS in the zone
ns-1302.awsdns-34.org, ns-1876.awsdns-42.co.uk, ns-435.awsdns-54.com, ns-692.awsdns-22.net
NameserverAddressesNetwork (AS)Glue
ns-1302.awsdns-34.org205.251.197.22 2600:9000:5305:1600::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1876.awsdns-42.co.uk205.251.199.84 2600:9000:5307:5400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-435.awsdns-54.com205.251.193.179 2600:9000:5301:b300::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.179 2600:9000:5301:b300::1
ns-692.awsdns-22.net205.251.194.180 2600:9000:5302:b400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1302.awsdns-34.org, ns-1876.awsdns-42.co.uk, ns-435.awsdns-54.com, ns-692.awsdns-22.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-1302.awsdns-34.org 205.251.197.22NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1302.awsdns-34.org 2600:9000:5305:1600::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1876.awsdns-42.co.uk 205.251.199.84NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1876.awsdns-42.co.uk 2600:9000:5307:5400::1NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns-435.awsdns-54.com 205.251.193.179NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-435.awsdns-54.com 2600:9000:5301:b300::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-692.awsdns-22.net 205.251.194.180NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-692.awsdns-22.net 2600:9000:5302:b400::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-435.awsdns-54.com

Found

Primary (MNAME)
ns-435.awsdns-54.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-1302.awsdns-34.org (205.251.197.22)1
ns-1302.awsdns-34.org (2600:9000:5305:1600::1)1
ns-1876.awsdns-42.co.uk (205.251.199.84)1
ns-1876.awsdns-42.co.uk (2600:9000:5307:5400::1)1
ns-435.awsdns-54.com (205.251.193.179)1
ns-435.awsdns-54.com (2600:9000:5301:b300::1)1
ns-692.awsdns-22.net (205.251.194.180)1
ns-692.awsdns-22.net (2600:9000:5302:b400::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-435.awsdns-54.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

26 records at the apex

Found

Read from
205.251.197.22:53
TypeValueTTL
SOAns-435.awsdns-54.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1302.awsdns-34.org.300
NSns-1876.awsdns-42.co.uk.300
NSns-435.awsdns-54.com.300
NSns-692.awsdns-22.net.300
A13.32.121.8360
A13.32.121.9060
A13.32.121.8560
A13.32.121.1660
AAAA2600:9000:236e:2000:1c:e61f:d600:93a160
AAAA2600:9000:2240:bc00:1c:e61f:d600:93a160
AAAA2600:9000:236e:1e00:1c:e61f:d600:93a160
AAAA2600:9000:2240:e600:1c:e61f:d600:93a160
AAAA2600:9000:2240:600:1c:e61f:d600:93a160
AAAA2600:9000:2240:3e00:1c:e61f:d600:93a160
AAAA2600:9000:2240:1000:1c:e61f:d600:93a160
AAAA2600:9000:236e:3200:1c:e61f:d600:93a160
MX10 usb-smtp-inbound-1.mimecast.com.300
MX10 usb-smtp-inbound-2.mimecast.com.300
TXT"0ed1fe018a39f996de9db94c489240d9699e419967"300
TXT"MS=ms65172152"300
TXT"_globalsign-domain-verification=LtWfTPBe6sHQjRUbEU0qXldvULQcSWNcMY1DjtKF2z"300
TXT"google-site-verification=3ej7vQIwUCFBDXmjJp4y3RcV9kRxlOKv2PPkigG1kXk"300
TXT"google-site-verification=ZqRhavwff0tXNUTTVqglKLGF3Pp5qrSGBipmTGq7T1M"300
TXT"google-site-verification=g04lHpApzxpE3Z9StXxcjIzcBXiJ8P80ABmAOSObtt0"300
TXT"v=spf1 include:spf.protection.outlook.com include:usb._netblocks.mimecast.com -all"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), AAAA (1m). 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