tek.com

Checked 22 October 2026, 11:00 UTC · via 8.8.8.8
!Passed with warnings
31 passed 1 warning 0 failed 3 info

Registration

info

.com generic · SafeNames Ltd. · expires 2028-05-09

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
SafeNames Ltd.
Registered
8 May 1986
Last changed
31 May 2026
Expires
9 May 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns-1077.awsdns-06.org, ns-1764.awsdns-28.co.uk, ns-381.awsdns-47.com, ns-861.awsdns-43.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 2028-05-09 #3
    The registration is valid until 2028-05-09 (564 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-1077.awsdns-06.org, ns-1764.awsdns-28.co.uk, ns-381.awsdns-47.com, ns-861.awsdns-43.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1077.awsdns-06.org, ns-1764.awsdns-28.co.uk, ns-381.awsdns-47.com, ns-861.awsdns-43.net
NS in the zone
ns-1077.awsdns-06.org, ns-1764.awsdns-28.co.uk, ns-381.awsdns-47.com, ns-861.awsdns-43.net
NameserverAddressesNetwork (AS)Glue
ns-1077.awsdns-06.org205.251.196.53 2600:9000:5304:3500::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1764.awsdns-28.co.uk205.251.198.228 2600:9000:5306:e400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-381.awsdns-47.com205.251.193.125 2600:9000:5301:7d00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.125 2600:9000:5301:7d00::1
ns-861.awsdns-43.net205.251.195.93 2600:9000:5303:5d00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1077.awsdns-06.org, ns-1764.awsdns-28.co.uk, ns-381.awsdns-47.com, ns-861.awsdns-43.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-1077.awsdns-06.org 205.251.196.53NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1077.awsdns-06.org 2600:9000:5304:3500::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1764.awsdns-28.co.uk 205.251.198.228NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1764.awsdns-28.co.uk 2600:9000:5306:e400::1NOERROR, 12 ms, authoritativenoyes / yesrefused-
ns-381.awsdns-47.com 205.251.193.125NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-381.awsdns-47.com 2600:9000:5301:7d00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-861.awsdns-43.net 205.251.195.93NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-861.awsdns-43.net 2600:9000:5303:5d00::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-381.awsdns-47.com

Found

Primary (MNAME)
ns-381.awsdns-47.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-1077.awsdns-06.org (205.251.196.53)1
ns-1077.awsdns-06.org (2600:9000:5304:3500::1)1
ns-1764.awsdns-28.co.uk (205.251.198.228)1
ns-1764.awsdns-28.co.uk (2600:9000:5306:e400::1)1
ns-381.awsdns-47.com (205.251.193.125)1
ns-381.awsdns-47.com (2600:9000:5301:7d00::1)1
ns-861.awsdns-43.net (205.251.195.93)1
ns-861.awsdns-43.net (2600:9000:5303:5d00::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-381.awsdns-47.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

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
22 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
12985ECDSAP256SHA256 (13)SHA256 8E8E9B935A1DF99E…yes

DNSKEY in the zone

Key tagRoleAlgorithm
8413ZSK (256)ECDSAP256SHA256 (13)
36665ZSK (256)ECDSAP256SHA256 (13)
12985KSK (257)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 12985 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 2h0m0s and created on demand; the current one was made at 2026-10-22 10:01 UTC and expires at 2026-10-22 12:16 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

warn

28 records at the apex

Found

Read from
205.251.196.53:53
TypeValueTTL
SOAns-381.awsdns-47.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1077.awsdns-06.org.60
NSns-1764.awsdns-28.co.uk.60
NSns-381.awsdns-47.com.60
NSns-861.awsdns-43.net.60
A192.65.40.25900
MX10 mxa-00a11b02.gslb.pphosted.com.3600
MX10 mxb-00a11b02.gslb.pphosted.com.3600
TXT"8dm7227trln471g3qtjzsnrtqvyj3zq0"180
TXT"CD603218440B46C807BCF0EF6CD5825BBA57BB1EB6078C14E2D45E3CDE9B47DA"180
TXT"MS=ms36335287"180
TXT"_2sie2aq6idlb0b7are39jtuwo6sxpt9"180
TXT"_4nqdccw6sset0k6phatqsguyigvz8o2"180
TXT"_mnjlb2hxvhpiwpcmruv7r2bhhh74ook"180
TXT"be06bd60-3e1e-4a9b-a243-1e464ecdc088"180
TXT"box-domain-verification=0eaf0b3bdc36b04d3262f958c30c1e91333f949d77ada52007c99b3f40a98f68"180
TXT"d365mktkey=6t93b2qbejd8yc3q9qx9s7mhl"180
TXT"d365mktkey=7yIYKrN3Q4P5JaJtulJ1WvKpzO4QCpVOoZUamSfPBxcx"180
TXT"facebook-domain-verification=o7c994t8ti6tndogcyhqr60jd8skvg"180
TXT"flexera-domain-verification-cxjinbffirgtzuls"180
TXT"google-site-verification=wfPBuIyxWJ-UCU1LyoLjJrQ6D2eoGSZd8zEMVWGvQjY"180
TXT"jdl0fMf9CHA9pnrmFcnE3GiBuYcxi+XvR9XiP0VFLR1Y39wBFvOIFxJ7TWYply/fPJwIcceZiv1DKMfFoPVkMg=="180
TXT"v=spf1 include:_spf.ralliant.com ip4:5.61.117.96/28 include:nw027.com ~all"180
CAA0 issue "amazon.com"3600
CAA0 issue "digicert.com"3600
CAA0 issue "pki.goog; cansignhttpexchanges=yes"3600
CAA0 issuewild "digicert.com"3600
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: NS (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1m; 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, pki.goog.