investopedia.com

Checked 22 October 2026, 09:21 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-07-25

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
25 July 1999
Last changed
23 June 2026
Expires
25 July 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
blue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org
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 2027-07-25 #3
    The registration is valid until 2027-07-25 (275 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

blue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
blue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org
NS in the zone
blue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org
NameserverAddressesNetwork (AS)Glue
blue.foundationdns.com162.159.60.1 108.162.198.1 172.64.40.1 2a06:98c1:56::ac40:2801 2606:4700:57::6ca2:c601 2803:f800:52::a29f:3c01AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US108.162.198.1 162.159.60.1 172.64.40.1 2606:4700:57::6ca2:c601 2803:f800:52::a29f:3c01 2a06:98c1:56::ac40:2801
blue.foundationdns.net108.162.198.31 172.64.40.31 162.159.60.31 2a06:98c1:56::ac40:281f 2606:4700:57::6ca2:c61f 2803:f800:52::a29f:3c1fAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
blue.foundationdns.org162.159.60.61 172.64.40.61 108.162.198.61 2803:f800:52::a29f:3c3d 2a06:98c1:56::ac40:283d 2606:4700:57::6ca2:c63dAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • ✓ 3 nameservers #6
    Delegated to blue.foundationdns.com, blue.foundationdns.net, blue.foundationdns.org.
  • ✓ 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 3 IPv4 /24s and 3 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 18 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 3 TLDs #12
    Nameserver names use the TLDs .com, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

18 of 18 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
blue.foundationdns.com 162.159.60.1NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.com 108.162.198.1NOERROR, 10 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.com 172.64.40.1NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.com 2a06:98c1:56::ac40:2801NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.com 2606:4700:57::6ca2:c601NOERROR, 11 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.com 2803:f800:52::a29f:3c01NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.net 108.162.198.31NOERROR, 11 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.net 172.64.40.31NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.net 162.159.60.31NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.net 2a06:98c1:56::ac40:281fNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.net 2606:4700:57::6ca2:c61fNOERROR, 10 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.net 2803:f800:52::a29f:3c1fNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.org 162.159.60.61NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.org 172.64.40.61NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.org 108.162.198.61NOERROR, 10 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.org 2803:f800:52::a29f:3c3dNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.org 2a06:98c1:56::ac40:283dNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.0
blue.foundationdns.org 2606:4700:57::6ca2:c63dNOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.0

Checks

  • ✓ All respond #14
    All 18 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: blue.foundationdns.com: "2026.10.0"; blue.foundationdns.net: "2026.10.0"; blue.foundationdns.org: "2026.10.0". 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 2418001925 · primary blue.foundationdns.com

Found

Primary (MNAME)
blue.foundationdns.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418001925
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
blue.foundationdns.com (162.159.60.1)2418001925
blue.foundationdns.com (108.162.198.1)2418001925
blue.foundationdns.com (172.64.40.1)2418001925
blue.foundationdns.com (2a06:98c1:56::ac40:2801)2418001925
blue.foundationdns.com (2606:4700:57::6ca2:c601)2418001925
blue.foundationdns.com (2803:f800:52::a29f:3c01)2418001925
blue.foundationdns.net (108.162.198.31)2418001925
blue.foundationdns.net (172.64.40.31)2418001925
blue.foundationdns.net (162.159.60.31)2418001925
blue.foundationdns.net (2a06:98c1:56::ac40:281f)2418001925
blue.foundationdns.net (2606:4700:57::6ca2:c61f)2418001925
blue.foundationdns.net (2803:f800:52::a29f:3c1f)2418001925
blue.foundationdns.org (162.159.60.61)2418001925
blue.foundationdns.org (172.64.40.61)2418001925
blue.foundationdns.org (108.162.198.61)2418001925
blue.foundationdns.org (2803:f800:52::a29f:3c3d)2418001925
blue.foundationdns.org (2a06:98c1:56::ac40:283d)2418001925
blue.foundationdns.org (2606:4700:57::6ca2:c63d)2418001925

Checks

  • ✓ Serial 2418001925 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver blue.foundationdns.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2418001925 is a Unix timestamp (2046-08-16 03:12 UTC).

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

32 records at the apex

Found

Read from
162.159.60.1:53
TypeValueTTL
SOAblue.foundationdns.com. dns.cloudflare.com. 2418001925 10000 2400 604800 18001800
NSblue.foundationdns.com.86400
NSblue.foundationdns.net.86400
NSblue.foundationdns.org.86400
A172.66.1.220300
A162.159.141.224300
AAAA2606:4700:7::1d8300
AAAA2a06:98c1:58::1d8300
MX10 aspmx.l.google.com.300
MX20 alt1.aspmx.l.google.com.300
MX30 alt2.aspmx.l.google.com.300
MX40 aspmx2.l.google.com.300
MX50 aspmx3.l.google.com.300
TXT"HUBwlul5Fmy651CSwhlBYbGdWXe/swJ94BTJ+BEw/Eo9wc/RH7IF9Ee5L2ZqTwN7+Qpif6o3lZUamu73aplBWw=="60
TXT"MS=ms53501543"60
TXT"ZOOM_verify_w86oGdeLQF2AAEx7l3qMEg"60
TXT"adobe-idp-site-verification=4d443bb146b2a60fc0c0216c899a6ef9baa971cc3c36ac4b3020b4719b5c2e82"60
TXT"atlassian-domain-verification=uUTQHYge655RxaiCqp-IAyc/Q7GgtoJziDouyp0rB7n8OUdp4q8WfSgllR1IaJVR"60
TXT"cursor-domain-verification-gqy09j=ZDoEErJc1oNEoeMYMwuV8lXRK"60
TXT"docusign=2712ee87-1888-47bf-ae05-df3d4700e2af"60
TXT"facebook-domain-verification=87sdjaffvy7sgr85gcbiqhj8np8yqs"60
TXT"google-site-verification=2Ni9meB83NWRT3OKYCkkIW2n5s0vITMvWCOB5qHRSUI"60
TXT"google-site-verification=7U9I8OXvJpCZ0Wy22HzMIAqrxouKkzRsNYjxXo4r3ZE"60
TXT"google-site-verification=oexat4WLVVMCuMJyVHX6o-wTIKUky_V9F-jqr276Ppg"60
TXT"knowbe4-site-verification=fa92b9e4fa2fbe928824de444cebea5e"60
TXT"miro-verification=4a4040a3b3bcf8dd8693aadc1038336053ff0142"60
TXT"ms=ms48802116"60
TXT"openai-domain-verification=dv-gEkXimeL9rGDVPno1d3M80Ry"60
TXT"shopify-verification-code=4u4KjZnu6j7Y7M2F1NY3uHYaat9Dwc"60
TXT"slack-domain-verification=RsETqALsR9157MTqtXUQCYug79sLTGhiEqRotwoS"60
TXT"v=spf1 ip4:64.125.213.247 ip4:216.223.13.247 include:_spf.salesforce.com include:_spf.google.com include:mail.zendesk.com include:spf.mandrillapp.com include:shops.shopify.com include:amazonses.com ~all"60
TXT"windsurf-verification=TQmtgOufPIucXHTvZpCu-69s1cUqRgANHjvb1jSKps4="60

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 5m, NS 1d. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
  • ✓ 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