sharecare.com

Checked 22 October 2026, 10:41 UTC · via 8.8.8.8
!Passed with warnings
27 passed 2 warnings 0 failed 2 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-05-04

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
5 May 1998
Last changed
30 April 2026
Expires
4 May 2027
Status
client transfer prohibited
Registry nameservers
ns-1054.awsdns-03.org, ns-139.awsdns-17.com, ns-2016.awsdns-60.co.uk, ns-774.awsdns-32.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 2027-05-04 #3
    The registration is valid until 2027-05-04 (193 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns-1054.awsdns-03.org, ns-139.awsdns-17.com, ns-2016.awsdns-60.co.uk, ns-774.awsdns-32.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1054.awsdns-03.org, ns-139.awsdns-17.com, ns-2016.awsdns-60.co.uk, ns-774.awsdns-32.net
NS in the zone
ns-1054.awsdns-03.org, ns-139.awsdns-17.com, ns-2016.awsdns-60.co.uk, ns-774.awsdns-32.net
NameserverAddressesNetwork (AS)Glue
ns-1054.awsdns-03.org205.251.196.30 2600:9000:5304:1e00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-139.awsdns-17.com205.251.192.139 2600:9000:5300:8b00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.192.139 2600:9000:5300:8b00::1
ns-2016.awsdns-60.co.uk205.251.199.224 2600:9000:5307:e000::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-774.awsdns-32.net205.251.195.6 2600:9000:5303:600::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1054.awsdns-03.org, ns-139.awsdns-17.com, ns-2016.awsdns-60.co.uk, ns-774.awsdns-32.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-1054.awsdns-03.org 205.251.196.30NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1054.awsdns-03.org 2600:9000:5304:1e00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-139.awsdns-17.com 205.251.192.139NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-139.awsdns-17.com 2600:9000:5300:8b00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-2016.awsdns-60.co.uk 205.251.199.224NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-2016.awsdns-60.co.uk 2600:9000:5307:e000::1NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns-774.awsdns-32.net 205.251.195.6NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-774.awsdns-32.net 2600:9000:5303:600::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-2016.awsdns-60.co.uk

Found

Primary (MNAME)
ns-2016.awsdns-60.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-1054.awsdns-03.org (205.251.196.30)1
ns-1054.awsdns-03.org (2600:9000:5304:1e00::1)1
ns-139.awsdns-17.com (205.251.192.139)1
ns-139.awsdns-17.com (2600:9000:5300:8b00::1)1
ns-2016.awsdns-60.co.uk (205.251.199.224)1
ns-2016.awsdns-60.co.uk (2600:9000:5307:e000::1)1
ns-774.awsdns-32.net (205.251.195.6)1
ns-774.awsdns-32.net (2600:9000:5303:600::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-2016.awsdns-60.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

30 records at the apex

Found

Read from
205.251.196.30:53
TypeValueTTL
SOAns-2016.awsdns-60.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 8640060
NSns-1054.awsdns-03.org.172800
NSns-139.awsdns-17.com.172800
NSns-2016.awsdns-60.co.uk.172800
NSns-774.awsdns-32.net.172800
A44.206.109.16360
A50.19.62.12160
MX10 sharecare-com.mail.protection.outlook.com.1800
TXT"aa5de84b15c06e8d96202486d2141443c8618e7f"60
TXT"anthropic-domain-verification-d533d2=dR1t5u1penJOqLCnb9iokrVyR"60
TXT"atlassian-domain-verification=WGvR3MHXH3BlEHfkDgc9bIP0Uke67DRfIXZcHkF9buS0UOK60VBXdiDpA7C57b5M"60
TXT"atlassian-sending-domain-verification=e5613305-6b4d-4b16-af46-1841086cc622"60
TXT"ca3-6628bfa877b34d82ae07df5c7f03ef34"60
TXT"canva-site-verification=xx-wvYwG5ghVCeAnIha46Q"60
TXT"dropbox-domain-verification=897wwqfz78po"60
TXT"facebook-domain-verification=4ima6lsuiwhau7fgyms95bnzl3ciac"60
TXT"jamf-site-verification=-wwDGXaIOgdgxnRZV-sCzg"60
TXT"onetrust-domain-verification=f0defd4fd094470a98d0c10c3c739167"60
TXT"openai-domain-verification=dv-vLX5rsNqvvflGPepmLha7AVo"60
TXT"smartsheet-site-validation=h5GthEV-4t_19sYewwbl9832a95gIhUC"60
TXT"twilio-domain-verification=b7a0e4038980aa0c12321b082350c47b"60
TXT"v=spf1 include:et._spf.pardot.com include:spf.protection.outlook.com -all"60
TXT"z7jl0dzssskkk9g24wqpv7qp9n03zbqb"60
CAA0 iodef "mailto:siteops@sharecare.com"60
CAA0 issue "amazon.com"60
CAA0 issue "digicert.com"60
CAA0 issue "globalsign.com"60
CAA0 issue "letsencrypt.org"60
CAA0 issue "pki.goog"60
CAA0 issue "sectigo.com"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.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, digicert.com, globalsign.com, letsencrypt.org, pki.goog, sectigo.com.