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Total

DNS

Email

Security

Network

100

Availability

Domainharvard.edu

IPv41

IPv60

MX records2

StatusActive

Domain technical report

Harvard University

harvard.edu

Harvard University is devoted to excellence in teaching, learning, and research, and to developing leaders who make a difference globally.

Generated: 2026-08-08T17:12:42-05:00 · Cached result

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IPv41

IPv60

MX2

NS6

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

6 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

✓

DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

2 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

60 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

PTR reverse DNS0 / 30 pts · Network

PTR not detected.

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

192.0.66.20

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

2 record(s)

100 mx0b-00171101.pphosted.com.
100 mx0a-00171101.pphosted.com.

TXT

48 record(s)

"heroku-domain-verification=1qfmzz9vp3kexf4fr5zuliwvpieih2ffz4gexo7tlh4"
"anthropic-domain-verification-dprfjc=K9LyiFV7zLafnNLNO4lFjyaRx"
"globalsign-domain-verification=1DDF777ED1ADF45E5FFAFFAAD6774180"
"airtable-verification=b25f432db3cbc5bfc481914364b6ce41"
"globalsign-domain-verification=1C94E0FFAAE95796F597427644D90C03"
"globalsign-domain-verification=9ff12eafbeebb02a0f2b0383aef9d1fa"
"geneious.com:domain-verification=1781B6exIEsRBzJ0KzPtKg"
"status-page-domain-verification=p83gt91wpxms"
"adobe-idp-site-verification=66e813947c764d98330002232f383a68df8ad609065abb9482f3805dd2a1902c"
"google-site-verification=NEWpTHNZnWRWN3trkIMeFbuPVG3ExwOXUHlC9aJ2sks"
"google-site-verification=DZTZhbBaYJ6AO5j-tHFYBdkwryNywFh2gMUeg3SRDSg"
"google-site-verification=lY-T8NneGQX1RGXeaoBJjSmT_lx3dLRKDq1xY44ZI5w"
"Peh2GHoW8uiAzwS9tTZKlGBn9cMq6Y+XUFtrqmLtqFh1WvloPkzGczPsZcSdDfin4hZ7QiL9J7SM8yr7Yyzi8w=="
"MS=ms35192554"
"status-page-domain-verification=b4j4g69th3vv"
"globalsign-domain-verification=5A1F4E0081852ECB9015E837384121AD"
"fastly-domain-delgation-vdnblsdg768nm-21052021"
"_51a79b140kb1cu9o67nzuefyhhxthv9"
"ciscocidomainverification=41ce9827e3fbbca9ce75d5dbb5a6bc7b089dc4e239c1b56ba828216d1214480"
"google-site-verification=xqg8LPF_v_QMEIST789q8xhRDqUEX4_8lQjAvV6YykY"
"anthropic-domain-verification-gy5zhc=zmrGT2kyyc2HlnUn6f0utkQB6"
"google-site-verification=xXWxVElKH8ek_eW45CbAqVSMTQgAqLYUNQUrWpOmkrY"
"xIGeuA0e5B1BOjTE4IBO806ziFX9G1m2dVJ8zO7CMkmKwZ6MEkMXC0P7n5SRCGOdS9jbceH/7gKYgD4h9FBGKA=="
"globalsign-domain-verification=dcc2e5d0d67efc32044ae679c7cf19e6"
"openai-domain-verification=dv-e8vYSnmmPbWxpNte1iIKgvOO"
"airtable-verification=8b8110e9283dd87d57b3c5f2f5af2db1"
"smartsheet-site-validation=jfLh_IkQNJXuKKpTn7RydwiiaAOLy4CR"
"globalsign-domain-verification=B8359DCEFBCF837B95E2F82282E4297A"
"atlassian-domain-verification=Z8oUd5brL6/RGUMCkxs4U0P/RyhpiNJEIVx9HXJLr3uqEQ1eDmTnj1eq1ObCgY1i"
"_cwe6cxmi9tji7gazwtzipl4onpu23nv"
"atlassian-domain-verification=ASRKBXyOafZgDCRWh1Ylv34hiOSMgAIoNXs8H57rR3aTkuOD5KwJfUN9G3f7Ah/H"
"airtable-verification=a92cef30671587a4f6deb7951c1c3f1a"
"pardot679353=f93ea3588d69483bf48dbf587511f51d43ddadaae52b8bac6856c8428559a06d"
"pardot378242=7001579db574e062735763ba81b54da111abc31facf16bbfa653ab6b8a770988"
"pardot962443=9098884472c5cb29a2e20700b41411cb4aa5ebcf340360e71b2cd8464d8864b6"
"pardot679353=3cc5e124c5020a1e160f01981f45be33a467a1c802711e0e5654184ef56d18c9"
"mgverify=45e7fcf3ed36156afa50e8dd90aa36e82af6f11b95e35537b03ecebd434b328a"
"atlassian-domain-verification=OYfkFwspEELRW6A32BsDVWgvdz8/pLBxVcq7s/mHLBVGqRQRG58XA5LRtDAGpfA7"
"pardot_378242_*=8b485d5cd9114869cff8f307da5fa9287434ebec11621d88c07ce97a7fee06e0"
"openai-domain-verification=dv-5z82SztO32q9YBNgFooNBz5v"
"v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:spf.mailjet.com ~all"
"globalsign-domain-verification=87677a19ae97bfbeec25ff1510a80420"
"google-site-verification=pWvLuNePLYxAbafZw2a95vnBhvcj12DzM9NulT9ujSY"
"jAykGnWytyLeBseMa8x2/MBve6/yQqana4yrAc1ROoei7uZHUkM2FU0Xx4qI/rm+kOGdImZdoq0fdodgLEw1dg=="
"globalsign-domain-verification=C44DEEAC45AB4DC2B5AD0B9B2E5D5803"
"brevo-code:30d9f789747b4c124f72dabf24a0a97f"
"google-site-verification=MmfJS0BjLRgcxrlj8kAyNdToKeAmj0fKb-lPOnd5Pmo"
"google-site-verification=DzhZyP8pu0M1-RFghfTcSN-9poidboYRNdfn2Rf2hCQ"

NS

6 record(s)

a6-66.akam.net.
a16-64.akam.net.
a1-171.akam.net.
a11-67.akam.net.
a7-65.akam.net.
a10-66.akam.net.

SOA

1 record(s)

a1-171.akam.net. netmanager.harvard.edu. 2023072381 10800 3600 2419200 3600

CAA

0 record(s)

—

Not configured

DS

1 record(s)

38415 13 2 29F5C3AB0130C273D4504938A111F02CA9342DD13C02E92B369537C5 A18020C1

DNSKEY

4 record(s)

256 3 13 X1Im3OL/u59rIt0ucUM2pLvbw+JAxOtEv+qvqrhuWeZtIPw3jLOKCPq+ 6vC15do37vyFRUzvXR547Y5GSheXmw==
257 3 13 EkKHwxdk/inZi8RzddPQHgHBjT2gv01pa7ayCsnJUqJE8VYfsBdz5ZLH 8oyUvHZ4s5d7FVaxivHoQBnkn85FTA==
256 3 13 ccTsGqHsOuw6QWqXofWWdUZMDEUfLyKYnpudifvwPm5fpVQALWlT3oeD 86/iagr9hv2TU+3qO3yZYxnoPRfGmA==
257 3 13 a5ZjwYY78ViZmOYnfzMADYRXW1V/qCOkYdhlPC083+8fmI7juCZXdZyI 69Vfa2Mv30uHenFjwotgitTGMXWvGw==

RRSIG

7 record(s)

DNSKEY 13 2 7200 20260811134651 20260808124651 23262 harvard.edu. 6PH2VIHgh0vTwU9bZu0GBA61S9Q/y4sXwwyr9UwsL2zD5jHEwVohxduf 106YwLo6roJI0HgsBApwea8s+YdLqg==
DNSKEY 13 2 7200 20260811134651 20260808124651 38415 harvard.edu. MZOT6SgN+/UhtGXM+KiAXcFo75WMxt++zHiGiFicFXRZXWcVzEK2GQ4r lv3nnd6XTwligZv1JihF9qIOP/L9fA==
NS 13 2 300 20260811134651 20260808124651 48930 harvard.edu. 9Ch1FvkD0/4F/3+VdwrycC6qCIszv+HmyE3Dmi/aSGTRkxPJjCvB5O7u YPTe3bmRmTWPn2pBwJm19in9CCKMeQ==
SOA 13 2 300 20260811134651 20260808124651 48930 harvard.edu. +r6ICf0yv5UG9e5JkHpN/NSq5JVy8OcVlmGzUgPpVKTFmpoGMud638Qm c5aE8TCDgfoGFPeOKuAlYXEnLqncHg==
TXT 13 2 10800 20260811134651 20260808124651 48930 harvard.edu. HzjndaoW4Jc+tfoGx2QP8uSuGOsJXMJKCjsdCuJPGwL6fJWRjO8Y19pk JiIbHpTAnhtBjzRzogUk4EUdV004gw==
MX 13 2 180 20260811134651 20260808124651 48930 harvard.edu. kEc+3ZjVp8fqgBwL+c1ansAuRX0JXCirm4Us3RU7um//D6wm30MCnIIE Vab0IAlWVt0eOYgIvrzTR9NhZOwySQ==
DS 13 2 86400 20260812033229 20260805022229 6705 edu. vc2Jx7y4rZs6CnVsAM0Sch346qQ3hGfpciuDViwrSsFZLpg3KwMiDSLf y9bg0BsGj9+qLAHqR6SKvTqZPKbcPA==

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:spf.mailjet.com ~all

DMARC

Configured

v=DMARC1; p=quarantine; sp=none; pct=100; adkim=r; aspf=r; rua=mailto:dmarc_agg@vali.email

DKIM

Selector default

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDc2l1ozDhNKU/uIMrWwyD5sKFbyzHg8ZPEzcNTSccRFHdjCHCAds0izdKZtGYCPPoRK/0y3is2CYAdX9OcZrC78lvpSFMeDBMO+ZtBKfM763eDsXPeOOIj+ARzqQADtLkngU0pRoWib5VkwvHrdx8l/x68at4nbA8RzKp8Etc+hwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Harvard University

Description

Harvard University is devoted to excellence in teaching, learning, and research, and to developing leaders who make a difference globally.

Final URL

https://www.harvard.edu/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://www.harvard.edu/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Let's Encrypt

harvard.edu

Valid from

2026-07-10T00:40:59-05:00

Valid until

2026-10-08T00:40:58-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_128_GCM_SHA256

Security headers

0 active

—

HSTSNot detected

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

—

X-Frame-OptionsNot detected

—

Referrer PolicyNot detected

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

192.0.66.20

59,25 ms

Cloudflare

1.1.1.1

192.0.66.20

65,57 ms

Quad9

9.9.9.9

192.0.66.20

83,72 ms

OpenDNS

208.67.222.222

192.0.66.20

51,63 ms

AdGuard

94.140.14.14

192.0.66.20

62,08 ms

IP, geolocation and ASNAssociated network information

192.0.66.20

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

mx0b-00171101.pphosted.com

Port 25: Closed/unreachable - 13.7 ms - 
Port 465: Closed/unreachable - 21.4 ms - 
Port 587: Closed/unreachable - 22.4 ms -

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