zscaler.com

Checked 22 October 2026, 11:44 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-07-14

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
14 July 2008
Last changed
13 June 2025
Expires
14 July 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited
Registry nameservers
ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.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 2027-07-14 #3
    The registration is valid until 2027-07-14 (265 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

ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.com
NS in the zone
ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.com
NameserverAddressesNetwork (AS)Glue
ns10.dnsmadeeasy.com208.94.148.4 2600:1800:10::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.94.148.4 2600:1800:10::1
ns11.dnsmadeeasy.com208.80.124.4 2600:1801:11::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.124.4 2600:1801:11::1
ns12.dnsmadeeasy.com208.80.126.4 2600:1802:12::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.126.4 2600:1802:12::1
ns13.dnsmadeeasy.com208.80.125.4 2600:1801:13::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.125.4 2600:1801:13::1
ns14.dnsmadeeasy.com208.80.127.4 2600:1802:14::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.80.127.4 2600:1802:14::1
ns15.dnsmadeeasy.com208.94.149.4 2600:1800:15::1AS16552 DIGICERT - Tiggee LLC, US AS16552 DIGICERT - Tiggee LLC, US208.94.149.4 2600:1800:15::1

Checks

  • ✓ 6 nameservers #6
    Delegated to ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com, ns13.dnsmadeeasy.com, ns14.dnsmadeeasy.com, ns15.dnsmadeeasy.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 6 IPv4 /24s and 6 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16552 (DIGICERT - Tiggee LLC, US): 12 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .com
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns10.dnsmadeeasy.com 208.94.148.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns10.dnsmadeeasy.com 2600:1800:10::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns11.dnsmadeeasy.com 208.80.124.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns11.dnsmadeeasy.com 2600:1801:11::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns12.dnsmadeeasy.com 208.80.126.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns12.dnsmadeeasy.com 2600:1802:12::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns13.dnsmadeeasy.com 208.80.125.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns13.dnsmadeeasy.com 2600:1801:13::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns14.dnsmadeeasy.com 208.80.127.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns14.dnsmadeeasy.com 2600:1802:14::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns15.dnsmadeeasy.com 208.94.149.4NOERROR, 3 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast
ns15.dnsmadeeasy.com 2600:1800:15::1NOERROR, 4 ms, authoritativenoyes / yesrefusedDNS Made Easy Anycast

Checks

  • ✓ All respond #14
    All 12 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns10.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns11.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns12.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns13.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns14.dnsmadeeasy.com: "DNS Made Easy Anycast"; ns15.dnsmadeeasy.com: "DNS Made Easy Anycast".
    #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

warn

serial 2009571853 · primary ns20.digicertdns.com

Found

Primary (MNAME)
ns20.digicertdns.com
Contact (RNAME)
dns.digicertdns.com
Serial
2009571853
Refresh / retry
43200 s / 3600 s
Expire
1209600 s
Negative TTL
180 s

Serial per nameserver

NameserverSerial
ns10.dnsmadeeasy.com (208.94.148.4)2009571853
ns10.dnsmadeeasy.com (2600:1800:10::1)2009571853
ns11.dnsmadeeasy.com (208.80.124.4)2009571853
ns11.dnsmadeeasy.com (2600:1801:11::1)2009571853
ns12.dnsmadeeasy.com (208.80.126.4)2009571853
ns12.dnsmadeeasy.com (2600:1802:12::1)2009571853
ns13.dnsmadeeasy.com (208.80.125.4)2009571853
ns13.dnsmadeeasy.com (2600:1801:13::1)2009571853
ns14.dnsmadeeasy.com (208.80.127.4)2009571853
ns14.dnsmadeeasy.com (2600:1802:14::1)2009571853
ns15.dnsmadeeasy.com (208.94.149.4)2009571853
ns15.dnsmadeeasy.com (2600:1800:15::1)2009571853

Checks

  • ✓ Serial 2009571853 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    negative caching TTL (minimum) 3m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 12h, retry 1h, expire 14d, negative TTL 3m.
    #23
  • i
    Hidden master
    The primary nameserver ns20.digicertdns.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact dns@digicertdns.com #25
    The SOA RNAME dns.digicertdns.com means dns@digicertdns.com.
  • ✓ Timestamp serial #26
    The serial 2009571853 is a Unix timestamp (2033-09-05 22:24 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

pass

53 records at the apex

Found

Read from
208.94.148.4:53
TypeValueTTL
SOAns20.digicertdns.com. dns.digicertdns.com. 2009571853 43200 3600 1209600 18086400
NSns13.dnsmadeeasy.com.86400
NSns12.dnsmadeeasy.com.86400
NSns15.dnsmadeeasy.com.86400
NSns10.dnsmadeeasy.com.86400
NSns11.dnsmadeeasy.com.86400
NSns14.dnsmadeeasy.com.86400
A52.32.93.50300
A32.191.169.22300
MX5 alt2.aspmx.l.google.com.600
MX1 aspmx.l.google.com.600
MX5 alt1.aspmx.l.google.com.600
MX10 aspmx3.googlemail.com.600
MX10 aspmx2.googlemail.com.600
TXT"amazonses:wl6icFjX6sMj7W7ZeaZKlGq5UHM9wyZyaBHfTb/ww0Y="3600
TXT"vaav2lpI_ay00vIgJj_MtvZkDw"3600
TXT"zoho-verification=zb14424314.zmverify.zoho.com"3600
TXT"MS=20AAD605EF4925A48817482704CFB36086367575"3600
TXT"atlassian-domain-verification=GHIuiTNJEyRTQCH5jL/EGZu6xwnIu/+hom9PY2GwAGlrG42sumZ1iMUbHedcie2w"3600
TXT"v=spf1 include:_spf-cidr.zscaler.com include:_spf.google.com include:_spf.salesforce.com include:mktomail.com ~all"3600
TXT"_023ko7undbz5a6u43tiv8z5o4sf26gq"3600
TXT"MS=ms92318046"3600
TXT"google-site-verification=ASXyGJVTzzrfFOWJY7EDb90SS4HZumOhxHUtqpmC0A4"3600
TXT"google-site-verification=IuVWMyEKVrlTkdhT8LgAKbybYzXD7aKgb-pdZsXiVbw"3600
TXT"wiz-domain-verification=d8965cd04325dcf281c10b4d197880489562c0b36560c40f5a3caca39d264654"3600
TXT"pendo-domain-verification=w7DnTq1quk36QC9a7af900FubVY"3600
TXT"anthropic-domain-verification-fwvtnw=v4Zrj0oEHk8RmEguDQgqVCgF7"3600
TXT"effa4e0a4f3d7160fbef2acfb05f1e5e"3600
TXT"atlassian-domain-verification=B71Vkx4kM/wgXLTZeRs5AwG6lsUSGOjowHMlMDa7yZlbK4D7KnaangFYxEsVDEbA"3600
TXT"22w87ys2h6jv362wm4cr19sspgl39mlw"3600
TXT"docusign=3d543677-7d77-43db-8f09-67ae168d0376"3600
TXT"matillion:zscaler-com-saml"3600
TXT"ZOOM_verify_adX-S5_WSIO9EF5ie4z0XA"3600
TXT"miro-verification=bc56a4fd1377f3d5560cd084ce9437a5b7118f8e"3600
TXT"zoom-domain-verification=ZOOM_verify_c50e1596d4b1492db6c0eb6bec62e335"3600
TXT"00DU0000000Lyeu=1TBTP00000009Mh"3600
TXT"bw=9dOWNjAp1Ap2pHEyOwj70yB4g5uQfxt6zrUoU0ZTRKm1"3600
TXT"apple-domain-verification=LeTOyluQq35UJ2B1"3600
TXT"openai-domain-verification=dv-QjIjz7sNJsFfxGB2uB3ewKU6"3600
TXT"cursor-domain-verification-1etgqa=qGfz6rrqZOCbwQ31ccBHUxa5I"3600
TXT"ED51582625"3600
TXT"google-site-verification=EzAbvI03__UF7AOUWe1w8YLyGcMLVpQWfBknVKcbgjc"3600
TXT"amazonses:D+7iaK7vPA1NnSfdlv4mf7Z4jd6TtM8ijSnL9+bdt8c="3600
TXT"docker-verification=302c4c35-5577-4edd-99b2-4e0aef80e618"3600
TXT"parallels-domain-verification=b6d57e2e425043469c63cb1615e97cf22ec9e4b3237a432b8444e8ff10c0b9db"3600
TXT"google-site-verification=HgWoVAsCMh8-gOxRKm6WN6Y9tle_SjzLQFr4oekUuu0"3600
TXT"_4q2q9c10lqvj10z5g71r2vp1q0plash"3600
TXT"airtable-verification=90a9f0f1aea64b16d852e44dbde771a2"3600
TXT"adobe-idp-site-verification=018c2a23b7ecadd00dffa900603aef43504958df7362f0eee360a18b7e7948d0"3600
TXT"include:etrgmail.com"3600
TXT"zapier-domain-verification-challenge=f2b3efde-650e-4287-865a-bcf44e180c23"3600
CAA0 issue "digicert.com"1800
CAA0 issue "amazon.com"1800

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 10m, 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: digicert.com, amazon.com.