mheducation.com

Checked 22 October 2026, 09:50 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 5 info

Registration

info

.com generic · CSC Corporate Domains, Inc. · expires 2027-06-08

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
CSC Corporate Domains, Inc.
Registered
8 June 2000
Last changed
4 June 2026
Expires
8 June 2027
Status
client transfer prohibited
Registry nameservers
pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net, pdns85.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 2027-06-08 #3
    The registration is valid until 2027-06-08 (229 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

pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net, pdns85.ultradns.org

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net, pdns85.ultradns.org
NS in the zone
pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net, pdns85.ultradns.org
NameserverAddressesNetwork (AS)Glue
pdns85.ultradns.biz156.154.66.85 2610:a1:1015::79AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns85.ultradns.com156.154.64.85 2001:502:f3ff::79AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US156.154.64.85 2001:502:f3ff::79
pdns85.ultradns.net156.154.65.85 2610:a1:1014::79AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-
pdns85.ultradns.org156.154.67.85 2001:502:4612::79AS12008 VERCARA - Vercara, LLC, US AS12008 VERCARA - Vercara, LLC, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net, pdns85.ultradns.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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS12008 (VERCARA - Vercara, LLC, 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 .biz, .com, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
pdns85.ultradns.biz 156.154.66.85NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns85.ultradns.biz 2610:a1:1015::79NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns85.ultradns.com 156.154.64.85NOERROR, 3 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns85.ultradns.com 2001:502:f3ff::79NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns85.ultradns.net 156.154.65.85NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns85.ultradns.net 2610:a1:1014::79NOERROR, 4 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns85.ultradns.org 156.154.67.85NOERROR, 32 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver
pdns85.ultradns.org 2001:502:4612::79NOERROR, 32 ms, authoritativenoyes / yesrefusedUltraDNS Nameserver

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: pdns85.ultradns.biz: "UltraDNS Nameserver"; pdns85.ultradns.com: "UltraDNS Nameserver"; pdns85.ultradns.net: "UltraDNS Nameserver"; pdns85.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 2014117358 · primary pdns85.ultradns.com

Found

Primary (MNAME)
pdns85.ultradns.com
Contact (RNAME)
hostmaster.mheducation.com
Serial
2014117358
Refresh / retry
3600 s / 900 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
pdns85.ultradns.biz (156.154.66.85)2014117358
pdns85.ultradns.biz (2610:a1:1015::79)2014117358
pdns85.ultradns.com (156.154.64.85)2014117358
pdns85.ultradns.com (2001:502:f3ff::79)2014117358
pdns85.ultradns.net (156.154.65.85)2014117358
pdns85.ultradns.net (2610:a1:1014::79)2014117358
pdns85.ultradns.org (156.154.67.85)2014117358
pdns85.ultradns.org (2001:502:4612::79)2014117358

Checks

  • ✓ Serial 2014117358 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 15m, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver pdns85.ultradns.com is one of the listed nameservers.
  • ✓ Contact hostmaster@mheducation.com #25
    The SOA RNAME hostmaster.mheducation.com means hostmaster@mheducation.com.
  • ✓ Timestamp serial #26
    The serial 2014117358 is a Unix timestamp (2033-10-28 13:02 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

49 records at the apex

Found

Read from
156.154.66.85:53
TypeValueTTL
SOApdns85.ultradns.com. hostmaster.mheducation.com. 2014117358 3600 900 604800 300300
NSpdns85.ultradns.biz.86400
NSpdns85.ultradns.com.86400
NSpdns85.ultradns.net.86400
NSpdns85.ultradns.org.86400
A98.85.11.9656
A184.192.134.16256
A3.222.160.14756
MX10 mxa-00363701.gslb.pphosted.com.600
MX10 mxb-00363701.gslb.pphosted.com.600
TXT"liClWoeZEad9pMYaMIZz2jqKd0U"1800
TXT"sfOrgId = '00D6C0000009yRZ'"1800
TXT"klaviyo-site-verification=Ugs4T4"1800
TXT"v6grhjx01dxk5yjjfn1cmg0tpbgpll6f"1800
TXT"asv=8b051e8264b0157766b0f0ca9e727afd"1800
TXT"apple-domain-verification=1lJD7yCkNLx70BGU"1800
TXT"jamf-site-verification=UM34-Qn-quR-NA0uumS1DA"1800
TXT"sfEnvUrlPod = 'https://mh--dev.sandbox.my.site.com'"1800
TXT"amazonses:29ZQ0rqs3F93+tDQVLe8cI3rSaDKO+Qi8hl/iySiick="1800
TXT"amazonses:MGqHru9vHXwtjv6chSNbA9u+CFog403Li1ZZqLoQWJA="1800
TXT"amazonses:c0nhtnSNNxXqHNK9iy8SSVI1qj1DDadpwmIEiRKAv98="1800
TXT"amazonses:sInK/zhtrYvi9X6AyK4c5Ggi/eC9R8CRW7uMsuY/sgA="1800
TXT"sfEnvUrl = 'https://mh--dev.sandbox.my.salesforce.com'"1800
TXT"docker-verification=c3d7b8b9-cb16-4eb7-8d81-0974e72e0a0c"1800
TXT"cursor-domain-verification-e511vp=iQWgYSLMqCzXnhbDozJxE6T9x"1800
TXT"facebook-domain-verification=jmucfz5agnyrro97dnvyagbmvx5o18"1800
TXT"virtru-site-verify=TTsZikYt6*mCn-fz87jTeh!3g9**VH.3xTNfEs!J"1800
TXT"onetrust-domain-verification=1f5b083b2c4749c391bbf4d9656891bd"1800
TXT"anthropic-domain-verification-s041y7=euKjnfaw8mhUS1vjnGtUnyuhd"1800
TXT"pendo-domain-verification=402cbc8d-0f07-4299-b6db-6df6f6323e42"1800
TXT"pendo-domain-verification=92a38a43-3bd2-4007-b8be-7294fdda3277"1800
TXT"86d695fefe63afd6666ce6145951549e110b29722596e2ff14343d30e6e4181"1800
TXT"extensis-domain-verification=c523eb99-270b-4f84-9236-7b9815eb8ffd"1800
TXT"sfChatUrl = 'https://d.la2-c1cs-ia5.salesforceliveagent.com/chat'"1800
TXT"google-site-verification=1SrHQrsSKlaeICKr7JUyP2ac3FBE7GrDArejeqsNek8"1800
TXT"google-site-verification=8V7kN5CIvny969sc05QlJkMNRCDAFOdmom27W3WB5HE"1800
TXT"google-site-verification=AJzhGkXacqCr1vHOp3vFEbvkNqjleD3Xw3O0KT2nAoQ"1800
TXT"google-site-verification=WxPEEvrengXOlaM-QNci58faN8YYTU9NlHChMmVjDR0"1800
TXT"google-site-verification=oFO4uswKeYaeUxGm_B7UQ8U3m2ZtNk0Q21uqfGDp568"1800
TXT"sfContentUrl = 'https://d.la2-c1cs-ia5.salesforceliveagent.com/content'"1800
TXT"sfEmbdServiceUrl = 'https://mh--dev.my.salesforce.com/embeddedservice/5.0/esw.min.js'"1800
TXT"cisco-ci-domain-verification=4be5ec8f692cac532be02675d994632e86b8ec5ffd60df0ab03e0fc88f8e6619"1800
TXT"webexdomainverification.4C675B8B79D8B136E053AB06FC0A3F65=98c599cf-9d2f-4319-aa85-a5c4d1993db1"1800
TXT"atlassian-domain-verification=c7gXeeyIdIRhycDBErnNtWxlaLdJaH8Xe4HRW8opzT9s2oN12uSQAMt/uwuQHErb"1800
TXT"hpe-greenlake-domain-verification=69637752352d5a4b39503633484548785a595a315948577668596b496a717173"1800
TXT"figma-domain-verification=d7249675b732b693c2d795fab480fc4ca609f8d8a26a7a37105b47654a1313b5-1762875396"1800
TXT"figma-domain-verification=ea3477b1f8e715593349bd1ce1979c58a5beadf0a10e904d501a3444028b87ed-1763045434"1800
TXT"figma-domain-verification=f8a35c1b991243122cdc71405b1f75b0c8a35a759e75e9c1318c203d387832cc-1763500311"1800
TXT"v=spf1 include:_spf2.mheducation.com a:mx.brainshark.com include:amazonses.com include:mktomail.com include:spf.protection.outlook.com include:_spf.salesforce.com include:spf-00363701.pphosted.com -all"1800

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (56s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 1d; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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