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Total

DNS

Email

Security

Network

Availability

Domainjhu.edu

IPv41

IPv60

MX records1

StatusActive

Domain technical report

Attention Required! | Cloudflare

jhu.edu

Generated: 2026-08-08T18:22:16-05:00 · Cached result

JSON CSV PDF Visit site

IPv41

IPv60

MX1

NS2

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

2 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

1 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

84 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers8 / 35 pts · Security

2 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 response0 / 40 pts · Availability

HTTP/2 403

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

128.220.193.2

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

1 smtp.johnshopkins.edu.

TXT

39 record(s)

"smartsheet-site-validation=o1IiE_3MJXBZ0xFwfwhtOhRmrOKxm1A8"
"google-site-verification=5Zsy53rEK-hXGheCVnv_KOA9ga3WMOe8LQlInYaE668"
"apple-domain-verification=42Nv9AYu4nSWv2l4"
"cisco-ci-domain-verification=4076af602b47f3714aa27fbdc0e14da0ca421ee8838942eabd7409b638930e39"
"google-site-verification=OYMuhxFsKdAKd7rlfSh6j9u2RU7ZlLOIMb-apkt_TLE"
"ca3-54ded686d84a42a6a8e74e31814ecad8"
"docusign=e0788c6f-1ca1-40be-b4f8-7e1516c85ef1"
"facebook-domain-verification=fui05pg5padt3lqjitadnizlq80543"
"docusign=73173acb-df50-4cbd-b139-cc9adedeae7d"
"xr53hrygrc5x351yc9rts2ggkv08kb3k"
"google-site-verification=PogZzKp2fPlmh5CJooxo4w6DOBZvtzxL0aBOsSiGZwI"
"asv=5da62ba592bab3d1542dbbf409a762ee"
"B46963ED2CDBA64064F249DEE16C5EAA"
"AppId=000000004C0DFC04"
"apple-domain-verification=Jn3ciaqDbX1EwcFk"
"google-site-verification=_78PEuF0BsnxniCMxdFGUXI8-rKuzXbA8w65yi5lRIs"
"atlassian-domain-verification=v82iuU5jtUo6DLhV8wuZZxOk5KYBZdPh/5H+/GFe2/qw/ulV5gYzSVyg1UvD5xyw"
"v=spf1 ip4:128.220.39.0/24 ip4:162.129.199.0/24 ip4:128.220.229.235 ip4:162.129.251.11 ip4:162.129.251.14 ip4:128.220.160.6 ip4:128.220.160.1 ip4:128.220.40.0/24 include:spf.protection.outlook.com include:service-now.com -all"
"wkq43htjtz52dntbmtjw17pv0tqbbv0m"
"google-site-verification=Hdg6lOHShC5P7Lb-ffkmurUN4E5BFTJ3NLZJu_9veDk"
"6d0krd2r1m6d4rfp4y16ryvjq72x1wj4"
"addevent=verification"
"STKWsca/U+sp2fESD+L8E88fJJ/CVjPAf5Td1GTp3H+Qp45vNgVnofYNV9mj4wsk8YaFZSVLsFxNzJNg9vAlYA=="
"anthropic-domain-verification-swf0eb=RQ8Zfyg8S3PQ2BZYxq1laA9K6"
"apple-domain-verification=puEi9pYMYXEBi6bg"
"google-site-verification=czjH79sUqAY6z7WdhXo0K3Z_uB8PQrWPoYZFLyG2ZyI"
"facebook-domain-verification=og2369fpji19hzsapehl97bxys6cna"
"ERF+yrd/ZMTjPnD5bs/nBFo+y0qQgnrv6og7UQaJONReXkEFyLl3peWV1tnVep8tHaJ1RgDgxvRplFYItpeyMw=="
"e2ma-verification=e15fb"
"include:50639708.spf04.hubspotemail.net" "v=spf1 " "ip4:128.220.39.0/24 " "ip4:162.129.199.0/24 " "ip4:162.129.251.11 " "ip4:162.129.251.14 " "ip4:128.220.160.6 " "ip4:128.220.160.1 " "ip4:128.220.40.0/24 " "include:spf.protection.outlook.com include:service-now.com -all" ""
"facebook-domain-verification=w4q5d6dqct374zdq9lk2a8yfsucsne"
"google-site-verification=ilMpBs6aLedW4vFTLGnCyGYoQuSB5azucOxwxSMIsbg"
"facebook-domain-verification=llmgbgm34s61kngl4fu1njobuwv9dc"
"ZOOM_verify_HBPKAym7Tz-eFLcbrv5qMQ"
"google-site-verification=hNzuzBrLneJ7I5LUSy4YheAPZH2ZTk4Lhz76BOMrViE"
"docusign=29c2d014-367b-4c7c-a9fe-d6512a2f37b1"
"airtable-verification=79c988870bd1359906d21b0f994f3e00"
"docusign=47d09d1e-f20e-45ae-8348-9e0cde59d212"
"be53a892b3bf7129c12261ba89e8317ddc94023220d76fd9fa150b6d4b8f5c24"

NS

2 record(s)

ens1.jhu.edu.
ens1.jhmi.edu.

SOA

1 record(s)

ens1.jhu.edu. empty.empty. 2014191270 3600 600 1209600 3600

CAA

0 record(s)

—

Not configured

DS

2 record(s)

45408 13 2 01AD583736919D58E0E3FCEF5039BA38EF7BAD2A7126081E09A310DB 794AB9BF
5765 13 2 511CBC39BDC1317A3F765A9E17EA226078E1BD299261335B864D40AE 8A8574C5

DNSKEY

5 record(s)

257 3 13 QNPCWIhDrZzF08sxp4JHyEZm4AldNWoJR780z8CiOFMcrsPTYUsBfcdF njqnzZ3EW4cuviwYn5SHHrZ4CmQEeA==
257 3 13 88yip1AcgB1ymHotAzD03EjymiZESHzWhavyHif8xXUTKqN95ISNU4rY 4p0LgFc5IE/RKoeGvVNfMzukYISTIQ==
256 3 13 c0Xf6VGtpbDERSnmGItlg+yftYHcRJoG/CBzEswhBPSrSIKEAf2bgeUC qNq48ieoXI09zH4NRVfqwCVlZvcyEw==
256 3 13 /CxBqoFBMXFFZ3/My0XdB6LfEMof/62uglcjBi8o/HcqrqvA8HnvplXC mjHqNN8kLY5d9QWIEkBSBob8ihoGKA==
256 3 13 582jkzDa6dDqsUskyJRXoLlS//FsbE59ubjiG1wEvwxqaWCVX9rMR8gI jKntqCpYYkl/eNc+PfnSLedxYtBmvQ==

RRSIG

5 record(s)

SOA 13 2 3600 20260907230913 20260808220913 21566 jhu.edu. LIq3SEwSpurx3MO9vMKL2Al3yDvcjsFlcNKFhGnk0UDyXD+86jRXH30p 2WSwYtrbEqUJa9N8Q9C5RlClhePPuw==
NS 13 2 3600 20260904185010 20260805180911 21566 jhu.edu. ySkVr3UpEu//6MXgzZZKZBWh6s2f1umG8FnqeIAi9VMzq6aHL4HhG7iH h855D8fCRmAQUD1cxcUtdIxcVwQD1w==
TXT 13 2 3600 20260828121220 20260729115909 21566 jhu.edu. Lc7ddjmgtqbWLZufBtgpdhQYBdhblzDGvNEugaqOkDcNDbXkN/r3c1he dGgB4G1IAp+8Tigbry1hMnUYNps+Jg==
DS 13 2 86400 20260814033304 20260807022304 6705 edu. 9YJOeApO6UkefCRYLPIP7vck3Y2/4iYgHI4SBgDV8310+KhOhiWRXAn9 g7EuTVjOLM6Yhf95b8H4lJRGtTF2vQ==
MX 13 2 86400 20260904185010 20260805180911 21566 jhu.edu. nFwmWgO5cm/28RuOkZHji5W7aIX0jRviJhvE3Z1BFNZtoYFK9jkosSqg RbMwwUp1X5w6qQTfwjCCJsbbBw0esw==

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 ip4:128.220.39.0/24 ip4:162.129.199.0/24 ip4:128.220.229.235 ip4:162.129.251.11 ip4:162.129.251.14 ip4:128.220.160.6 ip4:128.220.160.1 ip4:128.220.40.0/24 include:spf.protection.outlook.com include:service-now.com -all

DMARC

Configured

v=DMARC1; p=reject; rua=mailto:twd3anjc@ag.dmarcian.com; ruf=mailto:twd3anjc@fr.dmarcian.com;

DKIM

Selector s1

k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxxnwZc4IneYo8cRg6PRR6pl4wxaqDxBVPRtJIMhHv29VTpmPUIMHKmwlShalUouq4ygcxNt90z3hfkUdmSfFm6sE/sdXCEdm1ufTnDcTt7RPOK16unAmdv6ruqdjqmd6ePYRlnkJtP+mVQar66FQuVFDAKsRlhhvyisd0nYt5C2IRmB14SlDZ2ebFvPEnjV12fgQcBT3Fo0L35CU1YoZQqDr0JONfYZHVMjCCQKZg4IUTTeOyriEE+gd2eukNIjLX8KQkZeNKuBv3ongV8Aac2Oq6+40VTNxre9dRaRg9Bld75lYdWiX6YqW8Afs9Tl4C6BhSThfsYuFoDOuKwMQIwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Attention Required! | Cloudflare

Description

Final URL

https://www.jhu.edu/

HTTP status

403

HTTP

Status

HTTP/2 403

Final URL

https://www.jhu.edu/

Version

Server

cloudflare

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Internet2

jhu.edu

Valid from

2026-04-15T19:00:00-05:00

Valid until

2026-10-31T18:59:59-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

2 active

—

HSTSNot detected

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

✓

X-Frame-OptionsImplemented

✓

Referrer PolicyImplemented

—

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

128.220.193.2

35,34 ms

Cloudflare

1.1.1.1

128.220.193.2

55,05 ms

Quad9

9.9.9.9

128.220.193.2

75,70 ms

OpenDNS

208.67.222.222

128.220.193.2

76,05 ms

AdGuard

94.140.14.14

128.220.193.2

75,49 ms

IP, geolocation and ASNAssociated network information

128.220.193.2

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

smtp.johnshopkins.edu

Port 25: Closed/unreachable - 34 ms - 
Port 465: Closed/unreachable - 4056.4 ms - 
Port 587: Closed/unreachable - 61.9 ms - 554 IronMTW5.johnshopkins.edu

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