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Total

DNS

Email

Security

Network

100

Availability

Domainnrao.edu

IPv41

IPv60

MX records3

StatusActive

Domain technical report

National Radio Astronomy Observatory – Revealing the Hidden Universe

nrao.edu

The public page for the National Radio Astronomy Observatory (NRAO). Find info related to radio astronomy and the efforts of the observatory.

Generated: 2026-08-10T04:16:33-05:00 · Cached result

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IPv41

IPv60

MX3

NS3

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

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

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

3 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

DMARC0 / 25 pts · Mail

DMARC policy not found.

✓

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

81 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 DNS30 / 30 pts · Network

PTR: cvweb-3.cv.nrao.edu

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)

192.33.115.129

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

3 record(s)

10 io.gb.nrao.edu.
10 revere-vml.aoc.nrao.edu.
10 cv3.cv.nrao.edu.

TXT

8 record(s)

"ugIPtt8T4Uy8aftOSmTufO3LJGLJci5M8dHoq6XgewpbFttQLlDOMzlFZXLLeO0RGjXuUGWh8Arwg8RhOurJVw=="
"apple-domain-verification=IoBzh5sfRMYauHv3"
"MS=B1EC8FECD69CCA0B9D746BC8F02A33E353312AD4"
"docusign=7222632d-c362-4a84-9768-8e498759d6f5"
"atlassian-domain-verification=mjTlwjAqiE046j3AiCsCB9wU9q6fKyZ2VXmBvehlkWDjlPCdHtlqffkV/AGp3sam"
"mandrill_verify.YOUsnxKgVCS7JcUz8rfDhQ"
"MS=ms86952905"
"v=spf1 mx include:hgncloud.com include:spf.mandrillapp.com include:spf.protection.outlook.com ip4:192.33.115.70 ip4:146.88.9.34 ~all"

NS

3 record(s)

cv3.cv.nrao.edu.
zia.aoc.nrao.edu.
sadira.gb.nrao.edu.

SOA

1 record(s)

cv3.cv.nrao.edu. tech.nrao.edu. 2026072300 28800 14400 3600000 14400

SPF

Configured

v=spf1 mx include:hgncloud.com include:spf.mandrillapp.com include:spf.protection.outlook.com ip4:192.33.115.70 ip4:146.88.9.34 ~all

DMARC

Not configured

—

Not configured

DKIM

Selector mandrill

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCrLHiExVd55zd/IQ/J/mRwSRMAocV/hMB3jXwaHH36d9NaVynQFYV8NaWi69c1veUtRzGt7yAioXqLj7Z4TeEUoOLgrKsn8YnckGs9i3B3tVFB+Ch/4mPhXWiNfNdynHWBcPcbJ8kjEQ2U8y78dHZj1YeRXXVvWob2OaKynO8/lQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

National Radio Astronomy Observatory – Revealing the Hidden Universe

Description

The public page for the National Radio Astronomy Observatory (NRAO). Find info related to radio astronomy and the efforts of the observatory.

Final URL

https://public.nrao.edu/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://public.nrao.edu/

Version

Server

Apache/2.4.37 (Red Hat Enterprise Linux) OpenSSL/1.1.1k

X-Powered-By

PHP/8.2.32

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Sectigo Limited

*.nrao.edu

Valid from

2026-04-14T19:00:00-05:00

Valid until

2026-10-30T18:59:59-05:00

Days remaining

Protocol

TLSv1.2

Cipher

ECDHE-RSA-AES256-GCM-SHA384

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

192.33.115.129

60,25 ms

Cloudflare

1.1.1.1

192.33.115.129

99,09 ms

Quad9

9.9.9.9

192.33.115.129

81,40 ms

OpenDNS

208.67.222.222

192.33.115.129

96,64 ms

AdGuard

94.140.14.14

192.33.115.129

85,90 ms

IP, geolocation and ASNAssociated network information

192.33.115.129

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

io.gb.nrao.edu

Port 25: Closed/unreachable - 33.4 ms - 
Port 465: Closed/unreachable - 4047.4 ms - 
Port 587: Closed/unreachable - 4002.9 ms -

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