livescience.com

Checked 22 October 2026, 09:40 UTC · via 8.8.8.8
!Passed with warnings
27 passed 1 warning 0 failed 3 info

Registration

info

.com generic · Lexsynergy Limited · expires 2027-04-04

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Lexsynergy Limited
Registered
4 April 2001
Last changed
5 March 2026
Expires
4 April 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns-1524.awsdns-62.org, ns-1768.awsdns-29.co.uk, ns-816.awsdns-38.net, ns-91.awsdns-11.com
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 2027-04-04 #3
    The registration is valid until 2027-04-04 (164 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-1524.awsdns-62.org, ns-1768.awsdns-29.co.uk, ns-816.awsdns-38.net, ns-91.awsdns-11.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1524.awsdns-62.org, ns-1768.awsdns-29.co.uk, ns-816.awsdns-38.net, ns-91.awsdns-11.com
NS in the zone
ns-1524.awsdns-62.org, ns-1768.awsdns-29.co.uk, ns-816.awsdns-38.net, ns-91.awsdns-11.com
NameserverAddressesNetwork (AS)Glue
ns-1524.awsdns-62.org205.251.197.244 2600:9000:5305:f400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1768.awsdns-29.co.uk205.251.198.232 2600:9000:5306:e800::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-816.awsdns-38.net205.251.195.48 2600:9000:5303:3000::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-91.awsdns-11.com205.251.192.91 2600:9000:5300:5b00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.192.91 2600:9000:5300:5b00::1

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1524.awsdns-62.org, ns-1768.awsdns-29.co.uk, ns-816.awsdns-38.net, ns-91.awsdns-11.com.
  • ✓ 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-1524.awsdns-62.org 205.251.197.244NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1524.awsdns-62.org 2600:9000:5305:f400::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1768.awsdns-29.co.uk 205.251.198.232NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1768.awsdns-29.co.uk 2600:9000:5306:e800::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-816.awsdns-38.net 205.251.195.48NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-816.awsdns-38.net 2600:9000:5303:3000::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-91.awsdns-11.com 205.251.192.91NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-91.awsdns-11.com 2600:9000:5300:5b00::1NOERROR, 9 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-816.awsdns-38.net

Found

Primary (MNAME)
ns-816.awsdns-38.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-1524.awsdns-62.org (205.251.197.244)1
ns-1524.awsdns-62.org (2600:9000:5305:f400::1)1
ns-1768.awsdns-29.co.uk (205.251.198.232)1
ns-1768.awsdns-29.co.uk (2600:9000:5306:e800::1)1
ns-816.awsdns-38.net (205.251.195.48)1
ns-816.awsdns-38.net (2600:9000:5303:3000::1)1
ns-91.awsdns-11.com (205.251.192.91)1
ns-91.awsdns-11.com (2600:9000:5300:5b00::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-816.awsdns-38.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

info

19 records at the apex

Found

Read from
205.251.197.244:53
TypeValueTTL
SOAns-816.awsdns-38.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1524.awsdns-62.org.172800
NSns-1768.awsdns-29.co.uk.172800
NSns-816.awsdns-38.net.172800
NSns-91.awsdns-11.com.172800
A151.101.66.114300
A151.101.194.114300
A151.101.2.114300
A151.101.130.114300
MX1 smtp.google.com.3600
TXT"+GTGVMrHp0rvW2q0l3oHszfVzfjIxkE6goLfPCimYvc/KFJijrv2QeehCF1lSXE45Z8oHGNGTV8Lt2RVZQe2Dw=="300
TXT"MS=ms60632271"300
TXT"_globalsign-domain-verification=SQONiBgTxRVzPPtIHjei_IUGCiAa0KxoVWFw1QfVes"300
TXT"botify-site-verification=Bvex9ErUud910tVAIquqUVU7RH2if7uS"300
TXT"google-site-verification=Atqc9dP0n6k-l_-G2qLXJywPb_IyZrSK02WIJzRvNQ0"300
TXT"google-site-verification=bBWc5E4SVxmPs08cqtt_LR0zbPn6co3kaI9JwkW0S-A"300
TXT"google-site-verification=cT0VCuWQCTCmUeE43of8bJhsqQBzcEpdq18TOMdUguk"300
TXT"include:mx.google.com"300
TXT"v=spf1 include:_spf.google.com -all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1h, NS 2d.
  • ✓ 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