HOW.IS
?

How is mayoclinic.org?

Looks fine risk 0/100

Registered 30 years ago, on no blocklists we checked, valid HTTPS, the site answered 403 in 185 ms.

Why

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

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

How mayoclinic.org looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
403
185 ms
HTTPS
170 d
left on a Sectigo Limited certificate
Age
30 years
registered 1997-02-08
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records4 record types
A129.176.1.88
MX10 mail3.mayo.edu
10 mail5.mayo.edu
10 mail2.mayo.edu
10 mail4.mayo.edu
NSa1-70.akam.net
a14-64.akam.net
a18-66.akam.net
a3-66.akam.net
dns2.mayo.edu
a10-66.akam.net
dns1.mayo.edu
a13-66.akam.net
TXTgoogle-site-verification=6vNtdz7ZLqfEYDC2BP1hJKrMY_7QtttXQiTykug1hYA
facebook-domain-verification=hb879ie9x7og44v8xzca5ea8aywdbn
google-site-verification=JKKcK-DB3LxE-lKs2pZjLfa9o--85ahsbeOwD-LDNdY
apple-domain-verification=tB6bZOjVnxrGsvNAUCrbvu8w13vf8gisqEuRLcHvBHY
google-site-verification=4c_u2Bkm2Ukeurbn5E8KNOMWB8mZ13akrsKP4Pf9MLY
v=spf1 mx include:_spf.mayo.edu include:_spf_msgfe_mcmo.mayo.edu -all
_uz5g1k3wp3my53wj46cfl46g6oxkp54
google-site-verification=c_nY9XkweOjwanwbo_17mAeu3bcE4YM5ow3YLyr2F_Q
ncy863bz54x4hbfx0kxpzms73067ls2p
google-site-verification=ICU8hJAwq3J2ACTSaBwdom6ULZp-485-2jcBAe3MdHY
google-site-verification=rSQpDFkAgTB3fF4YoIkO1jSJOs7JOlG8CZMzuQJNdxs
apple-domain-verification=5FmDAtv2LsDzpMQJbHcPQadpnY8p1YJn5I5oM64bP_k
google-site-verification=RTxl6bpOvfdYSWz8OvWzgQBH7z8MU19_g8HIm0_FvmM
fastly-domain-delegation-b7wfficndvihh4xc7g4z-782253-2024-06-25
RegistrationCSC Corporate Domains, Inc.
registrarCSC Corporate Domains, Inc.
registered1997-02-08
expires2028-02-09
last changed2026-08-12
ownerMayo Foundation for Medical Education and Research
nameserversa1-70.akam.net
a10-66.akam.net
a13-66.akam.net
a14-64.akam.net
a18-66.akam.net
a3-66.akam.net
dns1.mayo.edu
dns2.mayo.edu
statusserver delete prohibited
client transfer prohibited
server transfer prohibited
server update prohibited
registered 1997-02-08expires 2028-02-09
HTTPS certificate170 days left
validyes
issuerSectigo Limited
coversmwredirects5.mayo.edu, *.accru.org, *.edlink.mayo.edu, *.mayo.edu, *.mayoclinic.org, *.mayoclinicplatform.org, *.mayomedicallaboratories.com, *.testcatalog.org, accru.org, arabic.mayoclinic.org, edlink.mayo.edu, mayo.edu
protocolTLSv1.2
issued 2026-09-30expires 2027-04-16
DNSSECinsecure

Domain is not signed with DNSSEC

. → org → mayoclinic.org
Email authenticationfair
SPFpass v=spf1 mx include:_spf.mayo.edu include:_spf_msgfe_mcmo.mayo.edu -all
DMARCwarning policy none
DKIMnone of 1 common selectors

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 · 5 lookups
SURBL MultidomainURIBL MultidomainSpamCop129.176.1.88Barracuda129.176.1.88UCEPROTECT Level 1129.176.1.88

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=mayoclinic.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=mayoclinic.org"

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

Watch mayoclinic.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