HOW.IS
?

How is columbia.edu?

Not sure yet risk 10/100

On no blocklists we checked, valid HTTPS, the site answered 403 in 46 ms.

Why

02050100
finecarefulhigh risk
  • +10Could not read the domain's registration record.
  • ·Could not check registration; retry before trusting this domain.

Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

How columbia.edu looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
403
46 ms
HTTPS
71 d
left on a Google Trust Services certificate
Age
?
creation date not reported
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records4 record types
A162.159.128.65
162.159.138.64
MX10 mxa-00364e01.gslb.pphosted.com
10 mxb-00364e01.gslb.pphosted.com
NSns1.lse.ac.uk
auth2.dns.cogentco.com
ext-ns1.columbia.edu
auth1.dns.cogentco.com
TXTv=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
00D3i000000stv6=1TBVK00000003An
ZOOM_verify_aIBp_UI9RA-_nAc54T9CiA
apple-domain-verification=6W1ObUreaMieGziS
anthropic-domain-verification-01mqc0=QYIx6Pw50pyhbeOfqjhRRNpve
intersight=f68fd98601fae5dcfd60cd38f9df964367f5e3ebe94f0cc148eec13f7e11d7e6
docusign=f8b82e15-b287-46b9-9729-a7436d71c422
adobe-idp-site-verification=c4c82a5f2bf3cc3ee4ad2ee246c28e17ead150faf152556bc9ca5c068762b827
rm_verify=cf192bfd71
ZOOM_verify_ZJlClnqsRTqo4L8EQGaPDg
asv=c2f28d3e6fab94ed285140f6a7a2f595
docusign=abbafadf-a495-4889-935f-5fdac37be903
asv=beb9ba6971ecdd1dd74f01aec2023d91
autodesk-domain-verification=P6lfZ9W5VspsY7qG7oL0
google-site-verification=VAzSZlDrZGEFyyON0nW7RwMhOO4d5ysanDVLuqaqoQw
ZOOM_verify_H76gKGnfTfSjo0uBs3ATpw
00DVG000008EUsr=1TBVG0000000K0L
google-site-verification=B93x40FIZF4LI-5cayepjvuwU8ZodIQ09zIDG1gHtIc
MS=ms32107722
ntl-verify-4215bc7bc219630560b478cb158bc927dc970758
FD558E9C831CB5AFEEF2C5334AEC4B3F
MS=ms88535648
google-site-verification=79W02b1NsvPOhVkXxG5gXzAXuxuYquPTXmx_l6KfRok
ca3-154a83c0e9b44fa094af06b7a8c9f489
fastly-domain-delegation-columbia-323594-2020-12-07
fastly-domain-delegation-UzZdOKwpsuzDObCLhWK0-12292020
wpe-verification=cssrsprod
ZOOM_verify_ohdpGstzTlO2gNsWqnSiHQ
openai-domain-verification=dv-coLwtcZeuA8rWCUFNhz21TTz
atlassian-domain-verification=3a/aVmiVzaMOzlhAodx3n7lmq1cDotGOHNI3ehzFLzgN7YLZEBEjnxaaqyMmLY9s
ZOOM_verify__tMWR0IkQ5mSUFNi7PT0-A
00Dj0000001s08g=1TBRN00000006a5
atlassian-domain-verification=TGY4izz2FIXsrTR48IJgpJMfixggF0xpHJ4TC91Ii5DqZYvIR3zflZ1zbdDNI3NN
00D36000000XoHU=1TBUw00000001fF
hpe-greenlake-domain-verification=556851666b6c374965566f71625442624d4f683244765178674b706d41507758
MS=ms94259742
google-site-verification=6m_FjnmBT3E6N2cHMf6NxPjSVoWbq4IcRYNlAKT1Dzw
wpe-verification=ncdpcolumbia
ca3-018df5b7d38b415fbe9c920d89e3e815
Registrationregistrar not reported
HTTPS certificate71 days left
validyes
issuerGoogle Trust Services
coverscolumbia.edu, *.zi.columbia.edu, *.drupal7-test.cc.columbia.edu, *.reopencu.covid19.columbia.edu, *.drupal-test.business.columbia.edu, *.site.drupal8dev.cc.columbia.edu, *.ias-deprecated-test.cc.columbia.edu, *.worklife.columbia.edu, *.climate.columbia.edu, *.curp.columbia.edu, *.sociology.columbia.edu, *.drupal-dev.business.columbia.edu
protocolTLSv1.3
issued 2026-10-10expires 2027-01-08
DNSSECinsecure

Domain is not signed with DNSSEC

. → edu → columbia.edu
Email authenticationgood
SPFpass v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
DMARCwarning policy none
DKIMfound: selector1, selector2, s1, s2

Whether mail claiming to be from this domain can be checked as genuine.

Security scoregrade B · 158/205
Basic Security
20/40missing: DNSSEC Enabled
Record Security
23/45missing: CAA Records, DMARC Record, DKIM Presence
Advanced Security
20/25missing: IPv6 Support
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 8 lookups
SURBL MultidomainURIBL MultidomainSpamCop162.159.138.64Barracuda162.159.138.64UCEPROTECT Level 1162.159.138.64SpamCop162.159.128.65Barracuda162.159.128.65UCEPROTECT Level 1162.159.128.65

Green: clean. Red: listed. Grey: the list did not answer.

Ask it yourself

Agents get this as data. Bought through the API, the checks behind this page cost $0.070: profile $0.025 + trust $0.020 + screenshot $0.020 + site status $0.005.

curl "https://how.is/v1/domain/trust?domain=columbia.edu" \ -H "Authorization: Bearer $HOWIS_KEY" # or pay per call in USDC (x402), no key: the 402 tells your agent the price curl -i "https://how.is/v1/domain/profile?domain=columbia.edu"

MCP: add https://how.is/mcp to Claude, Codex or Cursor (one-line install) and ask for domain_trust on columbia.edu. Reference: /llms.txt.

Watch columbia.edu. DNS read at the source every 5 minutes; certificate, blocklists and expiry every 6 hours. You get an email only when something changes.

Watch — $1 / 30 days