HOW.IS
?

How is princeton.edu?

Not sure yet risk 10/100

On no blocklists we checked, valid HTTPS, the site answered 403 in 120 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 princeton.edu looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
403
120 ms
HTTPS
45 d
left on a InCommon, LLC certificate
Age
?
creation date not reported
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records4 record types
A140.180.223.22
MX10 princeton-edu.mail.protection.outlook.com
NSa24-66.akam.net
ns7.dnsmadeeasy.com
ns6.dnsmadeeasy.com
a1-158.akam.net
a7-65.akam.net
a3-67.akam.net
ns5.dnsmadeeasy.com
a6-64.akam.net
a20-65.akam.net
TXTairtable-verification=f404295b37024f7747d2de8944a93fee
github-verification=fRwTRsEqERcBV3GgKMdt4RYrb8CWTfLrN72Z5WdW
openai-domain-verification=dv-ri2VCR2MpMXhB1YKDbAAsBWA
verifying for Netlify support case #19507
apple-domain-verification=M2IB2C41pkMXfS91
atlassian-domain-verification=uT+jiLnKmr+CvFxx3GGJaEAobMxLzqz6Kl+AO4ha-HGmEtTXuiNTu7uqG1zePfpI
F7EB4C8A0066246BC47806F4272AA19A
14EB47BE09914AA33EF9D9ED5A9BFEFF
C78F4E9C8396BB82985F96559095BB93
kwaacu+go+erbui7ikfpg6udfqlprkz9e2pxxeafjplnmhnkyjnfg0uokvami2f8iz7qet4dr+j8ou3/k7lz0a==
adobe-idp-site-verification=73f4a96f-50ca-4b7f-858e-6cef4af902aa
brevo-code:f80999df7fc32e2373bd2e3f47df53c1
57dmsH4y22BIE+OMFrnNvGtt3xyyh2Z/XhvRbQfkhMSIMh88zNcjCr/Bj0nOzrEDguiuGBxFOcYuCiw5hfnvDg==
paloaltonetworks-site-verification=fb3d98b6d82f4593542f655e32a264fe763b0b1ce0a80f5ceccc5c5d0feff519
31700bde-e486-4938-a359-8e497173042b
jamf-site-verification=gOHFT5mfGhE1m6aC3XEdag
google-site-verification=9spyuhtdpgltj4ba6qol87mlltsvqwtwpfpjckhxuaa
docusign=8ee25fec-197b-476d-9659-5a3717059bc0
docusign=9b74122b-7e36-4311-9fd4-a1f8200928a9
R6TEJ9GJ2ECTYPQRT0T76RZIKOG4TQV1Z6TD75P33
v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
google-site-verification=G9LehBu6F6NlP7N7c6lb7_dJ59z-b49Hd_AY38O27BA
google-site-verification=fxbfrfkt_fmpamiadsiqhygwsrxgcfsmxpkveva7bhk
ms=ms98806852
anthropic-domain-verification-ymbamp=9m87xWM7BYZwJSc80lcSy4QpO
dropbox-domain-verification=xf71iopc45pc
3E9C4486F3765CF5CE2AE23299F5A81E
Registrationregistrar not reported
HTTPS certificate45 days left
validyes
issuerInCommon, LLC
coversprinceton.edu
protocolTLSv1.2
issued 2026-05-28expires 2026-12-12
DNSSECinsecure

Domain is not signed with DNSSEC

. → edu → princeton.edu
Email authenticationexcellent
SPFpass v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
DMARCpass policy reject
DKIMfound: google, selector1, selector2, s1, s2

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

Security scoregrade B · 155/205
Basic Security
20/40missing: DNSSEC Enabled
Record Security
30/45missing: CAA Records, DKIM Presence
Advanced Security
10/25missing: Mail Server Configuration, SOA Record Configuration, IPv6 Support
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 5 lookups
SURBL MultidomainURIBL MultidomainSpamCop140.180.223.22Barracuda140.180.223.22UCEPROTECT Level 1140.180.223.22

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=princeton.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=princeton.edu"

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

Watch princeton.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