zoom.com

Checked 22 October 2026, 11:44 UTC · via 8.8.8.8
!Passed with warnings
26 passed 2 warnings 0 failed 3 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-12-02

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
22 April 1999
Last changed
31 October 2025
Expires
2 December 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns-1473.awsdns-56.org, ns-1861.awsdns-40.co.uk, ns-481.awsdns-60.com, ns-968.awsdns-57.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 2027-12-02 #3
    The registration is valid until 2027-12-02 (405 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

ns-1473.awsdns-56.org, ns-1861.awsdns-40.co.uk, ns-481.awsdns-60.com, ns-968.awsdns-57.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns-1473.awsdns-56.org, ns-1861.awsdns-40.co.uk, ns-481.awsdns-60.com, ns-968.awsdns-57.net
NS in the zone
ns-1473.awsdns-56.org, ns-1861.awsdns-40.co.uk, ns-481.awsdns-60.com, ns-968.awsdns-57.net
NameserverAddressesNetwork (AS)Glue
ns-1473.awsdns-56.org205.251.197.193 2600:9000:5305:c100::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1861.awsdns-40.co.uk205.251.199.69 2600:9000:5307:4500::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-481.awsdns-60.com205.251.193.225 2600:9000:5301:e100::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US205.251.193.225 2600:9000:5301:e100::1
ns-968.awsdns-57.net205.251.195.200 2600:9000:5303:c800::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1473.awsdns-56.org, ns-1861.awsdns-40.co.uk, ns-481.awsdns-60.com, ns-968.awsdns-57.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-1473.awsdns-56.org 205.251.197.193NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1473.awsdns-56.org 2600:9000:5305:c100::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1861.awsdns-40.co.uk 205.251.199.69NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1861.awsdns-40.co.uk 2600:9000:5307:4500::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-481.awsdns-60.com 205.251.193.225NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-481.awsdns-60.com 2600:9000:5301:e100::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-968.awsdns-57.net 205.251.195.200NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-968.awsdns-57.net 2600:9000:5303:c800::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-968.awsdns-57.net

Found

Primary (MNAME)
ns-968.awsdns-57.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-1473.awsdns-56.org (205.251.197.193)1
ns-1473.awsdns-56.org (2600:9000:5305:c100::1)1
ns-1861.awsdns-40.co.uk (205.251.199.69)1
ns-1861.awsdns-40.co.uk (2600:9000:5307:4500::1)1
ns-481.awsdns-60.com (205.251.193.225)1
ns-481.awsdns-60.com (2600:9000:5301:e100::1)1
ns-968.awsdns-57.net (205.251.195.200)1
ns-968.awsdns-57.net (2600:9000:5303:c800::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-968.awsdns-57.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

warn

30 records at the apex

Found

Read from
205.251.197.193:53
TypeValueTTL
SOAns-968.awsdns-57.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1473.awsdns-56.org.172800
NSns-1861.awsdns-40.co.uk.172800
NSns-481.awsdns-60.com.172800
NSns-968.awsdns-57.net.172800
A170.114.0.1160
MX10 mxa-00569201.gslb.pphosted.com.300
MX10 mxb-00569201.gslb.pphosted.com.300
TXT"HaFoSdUeCSdJo9U8lG@NWZ6vnoRltUteEAl&yuY$$eE25sKJguFH58Lss%9@e73OK#XigH^i3mCDjax&gfZq*90lw4k4Vi3UMpC"3600
TXT"MS=ms37328709"3600
TXT"adobe-idp-site-verification=7116ab50a89b2c2402382aea3362209410eac90f2a590f358ce1189d0ca1a8c4"3600
TXT"anthropic-domain-verification-mzg56s=vpNmDWwfLVSNLFCCywtMb6Hns"3600
TXT"apple-domain-verification=bzL9n7DPRh8nIyQU"3600
TXT"atlassian-domain-verification=o4YG+mXlOE6uTJb7uGimcl9DJZnVg4aimBCf/4UrplRJvMk84JnXh2zF8jZz21Fx"3600
TXT"docker-verification=5d64ad19-0f15-46a0-9bc3-817e577eb276"3600
TXT"dropbox-domain-verification=9dklsyoh0ul"3600
TXT"google-site-verification=0Xz7FWpo9Dn-wcylywsk3klA47thAGsu0sEyQINVV80"3600
TXT"google-site-verification=k1nKdEppgAfcBIQjwlOflCohpA7U4fc4PhIhwNrHf1c"3600
TXT"google-site-verification=wa9RTNAmvbZSMxaJqaXeIjJ7NHBNN7xCuBKD1sZuDfY"3600
TXT"google-site-verification=yiEieNiefNiSqgLq5rY_z_HyZ4HjDX_0yJlJME33_jA"3600
TXT"h1-domain-verification=5yw85Ewx1obuckMSkZQokfDYewnzdBw9JqKmZWMXqFs2F3cq"3600
TXT"nintex.5e7289cea709bf0d10e77561"3600
TXT"pardot84442=66c53a10788b0276a0880d5d21a71b44df9a3c5692e545acce46644ea73b1cc6"3600
TXT"s4pcsx9yj8thv2vb6gh6ryydd05zvcr9"3600
TXT"sending_domain84442=f09895e4aa7f6a4550421683b7e5d817ba38189dcc438f14daf27125a533de62"3600
TXT"smartsheet-site-validation=WHwoPMjyyUbL71JC9sECier4NQyyIVaL"3600
TXT"spycloud-domain-verification=25022702-4ddc-4746-be61-c2baf9b129e9"3600
TXT"stripe-verification=56bc5cf2da44b2033da49b45ed3789209db29432268975666693a750ecfde757"3600
TXT"v=DMARC1; p=reject; ri=3600; rua=mailto:sesbounce@zoom.us,mailto:dmarc_rua@emaildefense.proofpoint.com"3600
TXT"v=spf1 mx include:%{ir}.%{v}.%{d}.spf.has.pphosted.com include:_spf.google.com include:amazonses.com ip4:52.38.191.241 include:stspg-customer.com exists:%{i}._spf.mta.salesforce.com ip4:13.111.2.177 ~all"3600

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.
  • 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