proofpoint.com

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

Registration

info

.com generic · MarkMonitor Inc. · expires 2028-08-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
8 August 2001
Last changed
7 July 2026
Expires
8 August 2028
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns1.proofpoint.com, ns3.proofpoint.com, pdns99.ultradns.biz, pdns99.ultradns.com, pdns99.ultradns.net, pdns99.ultradns.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 2028-08-08 #3
    The registration is valid until 2028-08-08 (656 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

pass

ns1.proofpoint.com, ns3.proofpoint.com, pdns99.ultradns.biz, pdns99.ultradns.com, pdns99.ultradns.net, pdns99.ultradns.org

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.proofpoint.com, ns3.proofpoint.com, pdns99.ultradns.biz, pdns99.ultradns.com, pdns99.ultradns.net, pdns99.ultradns.org
NS in the zone
ns1.proofpoint.com, ns3.proofpoint.com, pdns99.ultradns.biz, pdns99.ultradns.com, pdns99.ultradns.net, pdns99.ultradns.org
NameserverAddressesNetwork (AS)Glue
ns1.proofpoint.com208.84.67.208 2620:100:9000:1::d0AS22843 PROOFPOINT-ASN-US-EAST - Proofpoint, Inc., US AS26211 PROOFPOINT-ASN-US-WEST - Proofpoint, Inc., US208.84.67.208 2620:100:9000:1::d0
ns3.proofpoint.com208.84.66.208 2620:100:9004:1::d0AS26211 PROOFPOINT-ASN-US-WEST - Proofpoint, Inc., US AS22843 PROOFPOINT-ASN-US-EAST - Proofpoint, Inc., US208.84.66.208 2620:100:9004:1::d0
pdns99.ultradns.biz156.154.66.99 2610:a1:1015::87AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns99.ultradns.com156.154.64.99 2001:502:f3ff::87AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US156.154.64.99 2001:502:f3ff::87
pdns99.ultradns.net156.154.65.99 2610:a1:1014::87AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns99.ultradns.org156.154.67.99 2001:502:4612::87AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-

Checks

  • ✓ 6 nameservers #6
    Delegated to ns1.proofpoint.com, ns3.proofpoint.com, pdns99.ultradns.biz, pdns99.ultradns.com, pdns99.ultradns.net, pdns99.ultradns.org.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns1.proofpoint.com, ns3.proofpoint.com.
  • ✓ 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.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS12008 (VERCARA - Vercara, LLC, US): 8 addresses; AS22843 (PROOFPOINT-ASN-US-EAST - Proofpoint, Inc., US): 2 addresses; AS26211 (PROOFPOINT-ASN-US-WEST - Proofpoint, Inc., US): 2 addresses.
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .biz, .com, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.proofpoint.com 208.84.67.208NOERROR, 112 ms, authoritativenoyes / yesrefusedHermetic SuperDNS
ns1.proofpoint.com 2620:100:9000:1::d0NOERROR, 162 ms, authoritativenoyes / yesrefusedHermetic SuperDNS
ns3.proofpoint.com 208.84.66.208NOERROR, 160 ms, authoritativenoyes / yesrefusedHermetic SuperDNS
ns3.proofpoint.com 2620:100:9004:1::d0NOERROR, 108 ms, authoritativenoyes / yesrefusedHermetic SuperDNS
pdns99.ultradns.biz 156.154.66.99NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns99.ultradns.biz 2610:a1:1015::87NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns99.ultradns.com 156.154.64.99NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns99.ultradns.com 2001:502:f3ff::87NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns99.ultradns.net 156.154.65.99NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns99.ultradns.net 2610:a1:1014::87NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns99.ultradns.org 156.154.67.99NOERROR, 31 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns99.ultradns.org 2001:502:4612::87NOERROR, 32 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver

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: ns1.proofpoint.com: "Hermetic SuperDNS"; ns3.proofpoint.com: "Hermetic SuperDNS"; pdns99.ultradns.biz: "UltraDNS Nameserver"; pdns99.ultradns.com: "UltraDNS Nameserver"; pdns99.ultradns.net: "UltraDNS Nameserver"; pdns99.ultradns.org: "UltraDNS Nameserver".
    #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 2018115229 · primary ns1.proofpoint.com

Found

Primary (MNAME)
ns1.proofpoint.com
Contact (RNAME)
ops.proofpoint.com
Serial
2018115229
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
1200 s

Serial per nameserver

NameserverSerial
ns1.proofpoint.com (208.84.67.208)2018115229
ns1.proofpoint.com (2620:100:9000:1::d0)2018115229
ns3.proofpoint.com (208.84.66.208)2018115229
ns3.proofpoint.com (2620:100:9004:1::d0)2018115229
pdns99.ultradns.biz (156.154.66.99)2018115229
pdns99.ultradns.biz (2610:a1:1015::87)2018115229
pdns99.ultradns.com (156.154.64.99)2018115229
pdns99.ultradns.com (2001:502:f3ff::87)2018115229
pdns99.ultradns.net (156.154.65.99)2018115229
pdns99.ultradns.net (2610:a1:1014::87)2018115229
pdns99.ultradns.org (156.154.67.99)2018115229
pdns99.ultradns.org (2001:502:4612::87)2018115229

Checks

  • ✓ Serial 2018115229 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 20m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.proofpoint.com is one of the listed nameservers.
  • ✓ Contact ops@proofpoint.com #25
    The SOA RNAME ops.proofpoint.com means ops@proofpoint.com.
  • ✓ Timestamp serial #26
    The serial 2018115229 is a Unix timestamp (2033-12-13 19:33 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

warn

57 records at the apex

Found

Read from
208.84.67.208:53
TypeValueTTL
SOAns1.proofpoint.com. ops.proofpoint.com. 2018115229 28800 7200 604800 12003600
NSpdns99.ultradns.org.3600
NSpdns99.ultradns.com.3600
NSns3.proofpoint.com.3600
NSns1.proofpoint.com.3600
NSpdns99.ultradns.biz.3600
NSpdns99.ultradns.net.3600
A45.60.151.207180
A45.60.171.207180
AAAA2a02:e980:13e::cf180
AAAA2a02:e980:e6::cf180
MX10 mxb-00148501.gslb.pphosted.com.1800
MX15 mx0b-00148501.pphosted.com.1800
MX10 mxa-00148501.gslb.pphosted.com.1800
MX15 mx0a-00148501.pphosted.com.1800
TXT"amazonses:q2hxXWvaOdgjhubWnZufuUhKgLZxfL3PoI4cptrU0gY="3600
TXT"atlassian-domain-verification=ehSV5ixRwTbI5wbth6qsMh3hGCusuawwQB3RtCdRGUyVC/hpoFIi/BljxMa3r0gn"3600
TXT"adobe-idp-site-verification=5bd692aa8ee1d148c00aac26f7ead08c64182725034dcf0691f7932590ca101e"3600
TXT"3138e5c5-9798-41bb-a66a-f0b02555197b"3600
TXT"webexdomainverification.=482d75bd-f93a-4b08-b9fd-f29cd4ac460f"3600
TXT"apple-domain-verification=nOC9FciUgMGXDPqR"3600
TXT"iJdvOvZ2JpKKuGmHz3m7jyiT9LcUpxjwXIqy0lreXX41M/DqvOyKHQQTBtOFMviSL7SN6As/3CMKHol8D+uD4Q=="3600
TXT"docker-verification=13460241-226e-4d29-97e7-4699d62bb596"3600
TXT"8g643mlg95390t9m27yhh8ccc3djh9kl"3600
TXT"_github-challenge-proofpoint-2=b5790c8e0b"3600
TXT"docusign=024d71b2-0e97-4a12-b5d5-59f1398496df"3600
TXT"asv=9465dad26feb30e29b83613f5c02a1de"3600
TXT"sl5htyxuslipmbdhyy7s5dpjweyuohqd"3600
TXT"amazonses:RlrTC7/Tv/cDEgJBOGnvF+fa+JgATSOhAby33zYuhWU="3600
TXT"anthropic-domain-verification-y3m137=qK0cxjmQtPkMGPQe9LKVeGZj2"3600
TXT"openai-domain-verification=dv-nIygpFUM4qrdLLDyQoKeI6q7"3600
TXT"google-site-verification=8gLyzJZLKfsYAHDKstNMwKKI-IB8zB3LPVBe8wyo7fw"3600
TXT"7zjqogz6pipkgcunowrzlr2kk4zzbvui"3600
TXT"google-site-verification=VneCes71bA1smMZFJ8bue3Hjjr5PSH2Nw3vXuBFdSOk"3600
TXT"cursor-domain-verification-wqe15z=RzypHif5XX1tmT2h6yen8EF3t"3600
TXT"BrG8ZlodJgGfUFj4RAmd28PHnIIHvBj56NGkzIIO3vwg0JUlTJISPsRo95V8+8QR0RY+aBIl21ch7my4YYFGSw=="3600
TXT"jamf-site-verification=VBoaCJNLZhZnSeap1YIWPA"3600
TXT"fastly-domain-delegation-3yF86BWSvK5eKtB4-875817-2025-01-23"3600
TXT"google-site-verification=uWpkNlmQfQH0hCnGWrr7ZC-o3dx4Dgi--DSZL1wtBoQ"3600
TXT"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ip4:91.209.104.0/25 a:spf-mailers.proofpoint.com include:i.ppops.net include:_spf.atlassian.net ~all"3600
TXT"globalsign-domain-verification=60999847F58FB37C020BB434D74EF1A9"3600
TXT"pendo-domain-verification=d131a0e2-664a-4230-ba51-0acf99fb4b90"3600
TXT"linear-domain-verification=cxrv67j8mq6e"3600
TXT"flvpf3txfi5s6mfi6q4gzths63zkgyh6"3600
TXT"atlassian-sending-domain-verification=37b6750b-3b8f-46dc-b2fa-c576d7d1965c"3600
TXT"docusign=2c075292-2334-4a0a-bf3b-71a084c9d0fb"3600
TXT"MS=ms66915438"3600
TXT"zoom-domain-verification=ZOOM_verify_10035bd9568f4feca52a7a00fe69b79a"3600
TXT"google-site-verification=h87yGt3EWJfCkagvPwOKkK1h1LGCdoBROU_kKbrdXPk"3600
TXT"google-site-verification=mM60vv41HV36Nx6G5NAk93Se7Z-Y1eWeetnizsR6zLA"3600
TXT"verification_token=FzhowMFsYTWbv2CwQzHuWar9b"3600
TXT"google-site-verification=sxZ-0Tdu9HaAjWzo8TkbC3Dcvbm9_TcCFaOUJhBGf1E"3600
TXT"smartsheet-site-validation=wDwCVDKaaE7jlmu8UfmZC7R_CVdVDt1n"3600
TXT"lfj1tq15csyc72w7bgdt23nv5sfdhbwv"3600
CAA0 issue "amazonaws.com"3600
CAA0 issue "comodo.com"3600
CAA0 issue "thawte.com"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (3m), AAAA (3m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1h; resolvers may use either.
    #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: amazonaws.com, comodo.com, thawte.com.