HOW.IS
?

How is stackexchange.com?

Looks fine risk 0/100

Registered 17 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 167 ms.

Why

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

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

How stackexchange.com looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
200
167 ms
HTTPS
76 d
left on a Let's Encrypt certificate
Age
17 years
registered 2009-06-12
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records5 record types
A198.252.206.1
MX1 aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
NSdamian.ns.cloudflare.com
sureena.ns.cloudflare.com
TXTgoogle-site-verification=PbDz-gjfB8Zt-6fgjpPjyh5-Qo2HsJp95qHdq4E0Gvk
lucid-verify-Ru9jD4dmh4XuV3h
v=spf1 ip4:52.38.191.241 include:_spf.google.com include:mailgun.org include:sendgrid.net include:mail.zendesk.com include:spf.tipalti.com ~all
OSGRXZDHB
CAA{'type': 'CAA', 'iodef': 'mailto:sysadmin-team@stackoverflow.com', 'critical': 128}
{'type': 'CAA', 'critical': 0, 'issuewild': 'digicert.com; cansignhttpexchanges=yes'}
{'type': 'CAA', 'issue': 'letsencrypt.org', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'ssl.com'}
{'type': 'CAA', 'issue': 'digicert.com; cansignhttpexchanges=yes', 'critical': 0}
{'type': 'CAA', 'issue': 'sectigo.com', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'letsencrypt.org'}
{'type': 'CAA', 'critical': 0, 'issuewild': 'pki.goog; cansignhttpexchanges=yes'}
{'type': 'CAA', 'issue': 'pki.goog; cansignhttpexchanges=yes', 'critical': 0}
{'type': 'CAA', 'issue': 'comodoca.com', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'sectigo.com'}
{'type': 'CAA', 'issue': 'ssl.com', 'critical': 0}
{'type': 'CAA', 'critical': 0, 'issuewild': 'comodoca.com'}
RegistrationCSC Corporate Domains, Inc.
registrarCSC Corporate Domains, Inc.
registered2009-06-12
expires2027-06-12
last changed2026-06-08
ownerStack Exchange, Inc.
nameserversdamian.ns.cloudflare.com
sureena.ns.cloudflare.com
statusclient transfer prohibited
registered 2009-06-12expires 2027-06-12
HTTPS certificate76 days left
validyes
issuerLet's Encrypt
covers*.meta.stackexchange.com, *.stackexchange.com, stackexchange.com
protocolTLSv1.3
issued 2026-10-14expires 2027-01-12
DNSSECinsecure

Domain is not signed with DNSSEC

. → com → stackexchange.com
Email authenticationexcellent
SPFpass v=spf1 ip4:52.38.191.241 include:_spf.google.com include:mailgun.org include:sendgrid.net include:mail.zendesk.com include:spf.tipalti.com ~all
DMARCpass policy reject
DKIMfound: google

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

Security scoregrade B · 170/205
Basic Security
10/40missing: DNSSEC Enabled, Nameserver Diversity
Record Security
45/45missing: 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 MultidomainSpamCop198.252.206.1Barracuda198.252.206.1UCEPROTECT Level 1198.252.206.1

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=stackexchange.com" \ -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=stackexchange.com"

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

Watch stackexchange.com. 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