HOW.IS
?

How is clevelandclinic.org?

Looks fine risk 0/100

Registered 29 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 196 ms.

Why

02050100
finecarefulhigh risk
  • ·Nothing in the checks added risk.

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

How clevelandclinic.org looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
200
196 ms · ends at my.clevelandclinic.org
HTTPS
72 d
left on a Google Trust Services certificate
Age
29 years
registered 1998-01-08
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records5 record types
A172.64.155.40
104.18.32.216
AAAA2606:4700:4407::6812:20d8
2a06:98c1:3103::ac40:9b28
MX10 us-smtp-inbound-2.mimecast.com
10 us-smtp-inbound-1.mimecast.com
NSetta.ns.cloudflare.com
bob.ns.cloudflare.com
TXTCyber Security. google-site-verification=JbmfgQrxaJNkFtbuyBrETJRlUeAE8CB-XOn9L7N9Zig
MS=ms25572796
google-site-verification=01A3wN51E8DU33ZpZlgHePSdKCPTXnwsLMFMkPzRg_I
v=spf1 include:us._netblocks.mimecast.com include:spf.protection.outlook.com include:spf.constantcontact.com ip4:192.35.79.108 ip4:192.35.79.200 ip4:192.35.79.198 ip4:192.28.148.57 ~all
facebook-domain-verification=3lrbkbzm0s2x1t20o5zbm9e8tlaqd5
google-site-verification=YAkTaotFYE_Y8NGl0OVXrzJtVwgIy83UPdnPvLDSupI
d365mktkey=6vnv94i0t2irkvtbnd7t9qlg5
d365mktkey=69fhnrl1ynapps6shvxrngv3m
d365mktkey=28sa7bafpe2de8vpiioj7eyhf
d365mktkey=3gwph51api0dfr21luukz4df7
google-site-verification=JbmfgQrxaJNkFtbuyBrETJRlUeAE8CB-XOn9L7N9Zig
d365mktkey=bdnrgug1lm2owwuuv3wofe3j
google-site-verification=jiByQXocollPQ2zxJrg_u2ViUjRcBsaxy8bc0-M8EWQ
7f576db0-d122-4e47-8a99-2393581c66e5
vZDYsw8mvEaAKUOOQV0AiSUAKcumtLY8gnaetoVvFfDatRSItRpXDv8Tpnr7Zk9WAKdfMNfvvcMRUWA6wY894A==
RegistrationGoDaddy Corporate Domains, LLC
registrarGoDaddy Corporate Domains, LLC
registered1998-01-08
expires2027-01-07
last changed2026-08-12
nameserversbob.ns.cloudflare.com
etta.ns.cloudflare.com
statusclient transfer prohibited
registered 1998-01-08expires 2027-01-07
HTTPS certificate72 days left
validyes
issuerGoogle Trust Services
coversclevelandclinic.org, jobs.clevelandclinic.org
protocolTLSv1.3
issued 2026-10-13expires 2027-01-11
DNSSECsecure

Domain is properly signed — chain validated by an independent validating resolver

. → org → clevelandclinic.org
Email authenticationexcellent
SPFpass v=spf1 include:us._netblocks.mimecast.com include:spf.protection.outlook.com include:spf.constantcontact.com ip4:192.35.79.108 ip4:192.35.79.200 ip4:192.35.79.198 ip4:192.28.148.57 ~all
DMARCpass policy reject
DKIMfound: selector1

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

Security scoregrade B · 160/205
Basic Security
10/40missing: DNSSEC Enabled, Nameserver Diversity
Record Security
30/45missing: CAA Records, DKIM Presence
Advanced Security
25/25
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 8 lookups
SURBL MultidomainURIBL MultidomainSpamCop104.18.32.216Barracuda104.18.32.216UCEPROTECT Level 1104.18.32.216SpamCop172.64.155.40Barracuda172.64.155.40UCEPROTECT Level 1172.64.155.40

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=clevelandclinic.org" \ -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=clevelandclinic.org"

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

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

Watch clevelandclinic.org. 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