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Total

DNS

Email

Security

Network

100

Availability

Domainjhuapl.edu

IPv41

IPv62

MX records3

StatusActive

Domain technical report

Johns Hopkins University Applied Physics Laboratory

jhuapl.edu

Johns Hopkins APL provides solutions to complex national security and scientific challenges with technical expertise and prototyping, research and development, and analysis.

Generated: 2026-08-09T15:49:07-05:00 · Cached result

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IPv41

IPv62

MX3

NS6

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

2 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 policy5 / 5 pts · Dns

Certificate authority restriction.

DNS propagation0 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

3 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

90 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 DNS30 / 30 pts · Network

PTR: a23-43-222-220.deploy.static.akamaitechnologies.com

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 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)

23.43.222.220

AAAA

2 record(s)

2600:1407:7400:c96::2298
2600:1407:7400:c95::2298

CNAME

0 record(s)

—

Not configured

MX

3 record(s)

30 aplegw16.jhuapl.edu.
50 aplegw11.jhuapl.edu.
30 aplegw15.jhuapl.edu.

TXT

18 record(s)

"MS=BEAF476F943E1201991908B95AFB9B197DEA8C91"
"jamf-site-verification=PeuuGuNBwj7C2p9253xp8g"
"apple-domain-verification=aAvXTLQ4Un0PaStD"
"v=spf1 ip4:128.244.251.0/24 ip4:128.244.43.0/28 ip4:128.244.208.130 ip4:128.244.208.131 ip4:128.244.208.132 mx ~all"
"google-gws-recovery-domain-verification=61164235"
"openai-domain-verification=dv-mTnY3JilyjE1YCxsoAIVPAH3"
"MS=ms44522167"
"slack-domain-verification=zRblbrJ3pYOQrzNlscjb4SjQ5oFdPvCs7w2EbHhT"
"_qgsf4f5mdnjvi3o9z3qee7b14jg7hh3"
"openai-domain-verification=dv-zu0mGeENBTYBhC5qeGTFobj5"
"duo_sso_verification=QpdBNAI3kyoR4wUsvRFq1jQ1YcTwNC2KEjmeKdHkd79Qga6mT09TAxSI2m7L3Rjp"
"apple-domain-verification=RKLIFrIynQzP4pCG"
"adobe-idp-site-verification=ee049a8f-813b-442f-90b4-fd104f875f5d"
"docker-verification=74707060-ea1a-48b1-b640-6a329db461d5"
"slack-domain-verification=sL3vQmrG3nMI3nlYRH4je7Zbrqo5ITqig05DxKHy"
"anthropic-domain-verification-tq341b=oBCkdcyRUqosD3DhP3ANRHo14"
"smartsheet-gov-site-validation=Di-sr5F3KATp9iHxNT4Uw-dQgkFYqbfa"
"duo_sso_verification=gKvlwWd4Fvr6B8p6oDANh07xX64SwVcFrnwQldvasYnCkL88dgjZdAJlclcNO8I9"

NS

6 record(s)

a1-121.akam.net.
a5-65.akam.net.
a7-66.akam.net.
a2-67.akam.net.
a24-64.akam.net.
a12-66.akam.net.

SOA

1 record(s)

infoblox-prod-gm.jhuapl.edu. nic-contact.jhuapl.edu. 14142256 10800 1080 2592000 600

CAA

4 record(s)

0 issue "letsencrypt.org"
0 issue "amazon.com"
0 issue "digicert.com"
0 issue "entrust.net"

DS

1 record(s)

45274 8 2 AA1E8F90A33CEC4B11680B9679263458354C855381C02B992404C44C 253B39CC

DNSKEY

3 record(s)

256 3 8 AwEAAaRm4SfJczn15LXzGQgFUwDd8f9u/SXVLbitXWC/iZe2FHP873Fs ESTfIEL4kb07V9tricxVnDeF3Vy6nGSI3oCGo3jqPyRrvSsZnvgyyf3A Z8U8ZlFIGuEbsmqGHk0btIexCFuw48RtOhsk4PbVeiYgCW2g1RmVdD/3 HjVT0HBv
256 3 8 AwEAAcYj1VvPKTphQTSAG1J2WBZDjKM87jmqYmVW+JK7/8bfh3DUAohP UBjogaa4KbGBYu/x9lgXUMkuqyZcbTsGux7HeriozS+ZRiICsMEZNoLw ld+PRJKcExci67+ohQz0xXJbkG4EFuQQQ8AsOxyHHa7pCRo+SDiQh4af G6lMDF4b
257 3 8 AwEAAaSKUECG+YfnVAmKwfbV+F7Ezd2yqbNuAr4QthjV8TlyXLt5hVAx G1UmjjerlqBj13pwes8gdqAZ5WbLXSH7a71+iCShg6GvQMM/2HkWIu5g Wpukr7sPJZvViHfI6bWOqzHXEJAXPhfdacTZ5wMu9s4fnevbrSdZm6mD rDxrBmT0qVntWayC46WnFTHdNsINsAgAOu4mA8+3Q4xuOdfmAQGExDqJ tSiZn7BicWZuaGCUppAHV84lQvJUI/lH6jKM9jes7vHLejFAjjfsOxVj +xneqP+SpA2exa/5xGMP7B7/I/3eq6Hmk3R5jg98RFrmiBbzstHOLCdW gMGUIiq5IQU=

RRSIG

5 record(s)

TXT 8 2 900 20260812082419 20260809072419 38380 jhuapl.edu. LywtTLHR7LesznFlLFCosFoD8VJ7kt91fwOFQkBMG0Gen3zLcRnkESiP YPZ27tqns74vDgS5nf9wPjwm/MOMMTtf1TLN3BOWo/KKF5W6TLv8f52j 4FxlOJJTMK/DuwbYZEH2H+oZp6TJhtQvisWv2NnxDsIYt363QYVYoyZd X0I=
MX 8 2 3600 20260812082419 20260809072419 38380 jhuapl.edu. ZriTzzEuYbqKAG67Xm2Wqd88ZzdT+5V0w4LW0jXYQngk/A9+KYWhfBbI aXpLruEhmSdcv2UQgmzQc55FfVQ4LUP3gRiSxp6wA6WMiM8/tiIC0T1C nTIhU32xZUhSm4th0Ue/wYUoOX3l4uLk0FpIMngzC4imvoY1l+QgoG8G ZS4=
NS 8 2 28800 20260812082419 20260809072419 38380 jhuapl.edu. LnFSgDlED9jzLXUtzOERtyZ08iMt2TIZPAkYHlVOm72g2HlhIfgAwVy3 S3kmbkyzHGEnchWROZyPqRqOjnTAAkb4Ydx2C0Hg5D/vERmnDvA+Vw4s O+tJpGOq7buLNeGIyFh4I2nE8iduLad31J72aGIe72WUUmv10m52e06E 0tk=
DS 13 2 86400 20260815033206 20260808022206 6705 edu. 1+xTzJrtk84Dy9H65rORRDzq8nWPkcLvjpa95y4lp9iWUCILlY3FB820 M9pk2S+fXEMsY71DtBvzgst+97LS5w==
CAA 8 2 3600 20260812082419 20260809072419 38380 jhuapl.edu. gqq31o/kpXzzLXoNN2743QJO7QWB29A9twNm6FV4w07i1gwAY4zsc3ve 6eRkhEFHxEZNQKAV5X37yY2CyS4L+rVNOSDNWKxZC7WC5LudIcQHz8JD +NuywsHzl4Xiy91XzdYMO41XvoGbenNfEXPLPjp2XxfW1ktIAcZu0dtO U3w=

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 ip4:128.244.251.0/24 ip4:128.244.43.0/28 ip4:128.244.208.130 ip4:128.244.208.131 ip4:128.244.208.132 mx ~all

DMARC

Configured

v=DMARC1; p=none; fo=1; adkim=r; rua=mailto:dmarc-aggdata@jhuapl.edu; ruf=mailto:dmarc-forensic@jhuapl.edu

DKIM

Not found

—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Johns Hopkins University Applied Physics Laboratory

Description

Johns Hopkins APL provides solutions to complex national security and scientific challenges with technical expertise and prototyping, research and development, and analysis.

Final URL

https://www.jhuapl.edu/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://www.jhuapl.edu/

Version

Server

AkamaiGHost

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

DigiCert Inc

www.jhuapl.edu

Valid from

2026-04-22T19:00:00-05:00

Valid until

2026-11-07T17:59:59-06:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

2 active

—

HSTSNot detected

—

Content Security PolicyNot detected

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

—

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

Review

Differences detected

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

23.43.222.220

47,69 ms

Cloudflare

1.1.1.1

23.43.222.220

41,10 ms

Quad9

9.9.9.9

23.60.63.85

34,46 ms

OpenDNS

208.67.222.222

23.43.222.220

228,52 ms

AdGuard

94.140.14.14

23.50.64.108

56,70 ms

IP, geolocation and ASNAssociated network information

23.43.222.220

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

aplegw16.jhuapl.edu

Port 25: Closed/unreachable - 10.1 ms - 
Port 465: Closed/unreachable - 4028.9 ms - 
Port 587: Closed/unreachable - 4027.9 ms -

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