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Total

DNS

Email

100

Security

Network

Availability

Domaincolumbia.edu

IPv42

IPv60

MX records2

StatusActive

Domain technical report

Just a moment...

columbia.edu

Generated: 2026-08-08T17:52:08-05:00 · Cached result

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IPv42

IPv60

MX2

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

4 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

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

86 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

✓

HTTP security headers35 / 35 pts · Security

9 of 9 evaluated headers detected.

PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓

IPv4 diversity35 / 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

2 record(s)

162.159.128.65
162.159.138.64

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

2 record(s)

10 mxb-00364e01.gslb.pphosted.com.
10 mxa-00364e01.gslb.pphosted.com.

TXT

35 record(s)

"google-site-verification=6m_FjnmBT3E6N2cHMf6NxPjSVoWbq4IcRYNlAKT1Dzw"
"openai-domain-verification=dv-coLwtcZeuA8rWCUFNhz21TTz"
"00D36000000XoHU=1TBUw00000001fF"
"ca3-018df5b7d38b415fbe9c920d89e3e815"
"ZOOM_verify_ZJlClnqsRTqo4L8EQGaPDg"
"intersight=f68fd98601fae5dcfd60cd38f9df964367f5e3ebe94f0cc148eec13f7e11d7e6"
"ZOOM_verify__tMWR0IkQ5mSUFNi7PT0-A"
"anthropic-domain-verification-01mqc0=QYIx6Pw50pyhbeOfqjhRRNpve"
"adobe-idp-site-verification=c4c82a5f2bf3cc3ee4ad2ee246c28e17ead150faf152556bc9ca5c068762b827"
"ZOOM_verify_H76gKGnfTfSjo0uBs3ATpw"
"wpe-verification=ncdpcolumbia"
"google-site-verification=79W02b1NsvPOhVkXxG5gXzAXuxuYquPTXmx_l6KfRok"
"MS=ms88535648"
"fastly-domain-delegation-columbia-323594-2020-12-07"
"ca3-154a83c0e9b44fa094af06b7a8c9f489"
"asv=c2f28d3e6fab94ed285140f6a7a2f595"
"00Dj0000001s08g=1TBRN00000006a5"
"fastly-domain-delegation-UzZdOKwpsuzDObCLhWK0-12292020"
"rm_verify=cf192bfd71"
"docusign=abbafadf-a495-4889-935f-5fdac37be903"
"google-site-verification=B93x40FIZF4LI-5cayepjvuwU8ZodIQ09zIDG1gHtIc"
"autodesk-domain-verification=P6lfZ9W5VspsY7qG7oL0"
"wpe-verification=cssrsprod"
"atlassian-domain-verification=3a/aVmiVzaMOzlhAodx3n7lmq1cDotGOHNI3ehzFLzgN7YLZEBEjnxaaqyMmLY9s"
"v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all"
"MS=ms94259742"
"ZOOM_verify_ohdpGstzTlO2gNsWqnSiHQ"
"ZOOM_verify_aIBp_UI9RA-_nAc54T9CiA"
"docusign=f8b82e15-b287-46b9-9729-a7436d71c422"
"00D3i000000stv6=1TBVK00000003An"
"00DVG000008EUsr=1TBVG0000000K0L"
"MS=ms32107722"
"apple-domain-verification=6W1ObUreaMieGziS"
"FD558E9C831CB5AFEEF2C5334AEC4B3F"
"atlassian-domain-verification=TGY4izz2FIXsrTR48IJgpJMfixggF0xpHJ4TC91Ii5DqZYvIR3zflZ1zbdDNI3NN"

NS

4 record(s)

auth2.dns.cogentco.com.
ext-ns1.columbia.edu.
auth1.dns.cogentco.com.
ns1.lse.ac.uk.

SOA

1 record(s)

ext-ns1.columbia.edu. hostmaster.columbia.edu. 93577 3600 1800 2419200 300

CAA

0 record(s)

—

Not configured

DS

0 record(s)

—

Not configured

DNSKEY

0 record(s)

—

Not configured

RRSIG

0 record(s)

—

Not configured

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

1 record(s)

0 100 389 adcudevdc08.adcudev.adcu.columbia.edu.

NAPTR

1 record(s)

1 0 "s" "SIP+D2U" "" _sip._udp.columbia.edu.

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all

DMARC

Configured

v=DMARC1; p=none; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com;

DKIM

Selector s1

k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1CJ6+q+N264DhEGxi92ISXCkZT+f06yc1eGBSwtRDqew9YFF9HoanGe8uEoPsUZhxP7dIIxktbM+/k4CnSgowyP+a82oMp/IzNueGSmN/mBD+v2NzYGctHBAQirflHsXncWhyW1vIJwB5YUoxqNHIGn+fI0EDyGl9bxBdP6CCaSUumGF3o95CWKuQa8N7LSikzVjNTBs1MQ0zIzUaDtP8Oejbai3x+Gallld+4jL9PkBIzzsH7tt1XjWSBcKVUBSjwBvkdohwdLHreNxHkV1wtmvhDzbnf5RSsd9i9wYYzzgmb8pJ/w58YyaEpVMieV5mgxFjD3x8mXUICC3e3dEBwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Just a moment...

Description

Final URL

https://columbia.edu/

HTTP status

403

HTTP

Status

HTTP/2 403

Final URL

https://columbia.edu/

Version

Server

cloudflare

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Google Trust Services

columbia.edu

Valid from

2026-08-05T04:46:40-05:00

Valid until

2026-11-03T04:45:40-06:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

9 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

✓

Referrer PolicyImplemented

✓

Permissions PolicyImplemented

✓

Cross-Origin-Opener-PolicyImplemented

✓

Cross-Origin-Embedder-PolicyImplemented

✓

Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

162.159.128.65, 162.159.138.64

35,35 ms

Cloudflare

1.1.1.1

162.159.128.65, 162.159.138.64

47,35 ms

Quad9

9.9.9.9

162.159.128.65, 162.159.138.64

30,75 ms

OpenDNS

208.67.222.222

162.159.128.65, 162.159.138.64

25,45 ms

AdGuard

94.140.14.14

162.159.128.65, 162.159.138.64

48,41 ms

IP, geolocation and ASNAssociated network information

162.159.128.65

No data

success

country

region

city

asn

organization

isp

162.159.138.64

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

mxb-00364e01.gslb.pphosted.com

Port 25: Closed/unreachable - 29 ms - 
Port 465: Closed/unreachable - 71 ms - 
Port 587: Closed/unreachable - 22.8 ms -

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