HOW.IS
?

How is colorado.edu?

Not sure yet risk 10/100

On no blocklists we checked, valid HTTPS, the site answered 200 in 71 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 colorado.edu looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
200
71 ms · ends at www.colorado.edu
HTTPS
29 d
left on a Certainly certificate
Age
?
creation date not reported
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records5 record types
A151.101.194.133
151.101.2.133
151.101.130.133
151.101.66.133
AAAA2a04:4e42:400::645
2a04:4e42::645
2a04:4e42:200::645
2a04:4e42:600::645
MX10 colorado-edu.mail.protection.outlook.com
NSa3-66.akam.net
a11-66.akam.net
a2-67.akam.net
a20-65.akam.net
a22-67.akam.net
a1-153.akam.net
TXTatlassian-sending-domain-verification=0b36ce8f-b8ec-42ae-8513-2264ea6d72e7
brevo-code:5f9e8714a4a7c561eb4cdf0848811c11
_3x6w07ujdy2wk71two4k8r4mwmtw6tq
yahoo-verification-key=LBMWN06qx3V2Edw1euv/698yUrWMNip2Dx3Y4yyVmYE=
docusign=dcb8d5d8-71e8-4884-8604-02297bea8072
d365mktkey=gzYMp5Xcnapx0VINCqRrvMtsD0TBSpLsrFjihN9HWQAx
bw=E1ibKK7mvTTWmq1SV+b/usJyVdN63EU+WFJh+SCp+abE
brevo-code:d6b523305300718643a7da77b3feeccb
brevo-code:ac843dd83e2d2a3d8becd980f7193d9b
docusign=7412fd08-3676-471a-8b65-8cc2b13c8137
brevo-code:369c77c6a5f703b937c1f7f79eb48489
openai-domain-verification=dv-5hwuyXiWaOnaq12vb3n73azV
google-site-verification=iaVX54MaxYscXlrL-DxuE9qtvLhAXkXKhG8sjiH5q-0
brevo-code:814ad43e9f25b1a52d6a2b213fcfae73
d365mktkey=CgcAzx2nkxamTBkNT7jagrT8Nadf6LPzlI0MLQHdKA0x
atlassian-domain-verification=QAg9aEn1gpS7HapLhSZbdUei9wTKTCl8EKYsTFg5su7bO2Pu30QtUg9QsGZzz1Vw
bMFGPNmrr7aoZsBWqexbujPiPjVzJe4wrZfl/t81eGptVxvkprdRSqKfj3paVrFcRhsrQHBlMGIR86eXUIYbCw==
v=spf1 ip4:128.138.1.0/24 ip4:128.138.48.0/20 ip4:128.138.64.0/18 ip4:128.138.128.0/17 ip4:204.228.68.0/22 ip4:132.194.255.30 ip4:136.147.136.157 include:_spf1.colorado.edu include:_spf2.colorado.edu ~all
jamf-site-verification=V7i5P5-QM02gTP25eIhZIA
MS=ms27269994
Registrationregistrar not reported
HTTPS certificate29 days left
validyes
issuerCertainly
coverscolorado.edu
protocolTLSv1.2
issued 2026-11-02expires 2026-12-02
DNSSECinsecure

Domain is not signed with DNSSEC

. → edu → colorado.edu
Email authenticationexcellent
SPFpass v=spf1 ip4:128.138.1.0/24 ip4:128.138.48.0/20 ip4:128.138.64.0/18 ip4:128.138.128.0/17 ip4:204.228.68.0/22 ip4:132.194.255.30 ip4:136.147.136.157 include:_spf1.colorado.edu include:_spf2.colorado.edu ~all
DMARCpass policy reject
DKIMfound: default, google, selector1, selector2, s1, s2, mail

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

Security scoregrade B · 155/205
Basic Security
10/40missing: DNSSEC Enabled, Nameserver Diversity
Record Security
30/45missing: CAA Records, DKIM Presence
Advanced Security
20/25missing: Mail Server Configuration
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 14 lookups
SURBL MultidomainURIBL MultidomainSpamCop151.101.2.133Barracuda151.101.2.133UCEPROTECT Level 1151.101.2.133SpamCop151.101.130.133Barracuda151.101.130.133UCEPROTECT Level 1151.101.130.133SpamCop151.101.66.133Barracuda151.101.66.133UCEPROTECT Level 1151.101.66.133SpamCop151.101.194.133Barracuda151.101.194.133UCEPROTECT Level 1151.101.194.133

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=colorado.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=colorado.edu"

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

IPv6. IPv6 readiness grade for colorado.edu Does colorado.edu work over IPv6? See the live check on aaaa.bot — website, mail and nameservers, graded A–F.

Watch colorado.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