HOW.IS
?

How is cdn20.com?

Be careful risk 20/100

Registered 20 years ago, no valid HTTPS certificate, the site did not answer (OSError).

Why

02050100
finecarefulhigh risk
  • +20No valid HTTPS certificate.

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

Site
down
OSError
HTTPS
invalid
Could not resolve host (ENODATA)
Age
20 years
registered 2006-04-28
Blocklists
0
listings across 2 lists

Everything we looked at

DNS records2 record types
NSdns4.cdn20.info
dns2.cdn20.info
dns1.cdn20.org
dns5.cdn30.org
dns3.cdn20.org
TXTddc86633f62244b5a57b6d3db165e4be
7d1ef318a8b64bfc849f3a93d9eb5645
RegistrationAlibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn)
registrarAlibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn)
registered2006-04-28
expires2027-04-28
last changed2026-04-14
nameserversdns1.cdn20.org
dns2.cdn20.info
dns3.cdn20.org
dns4.cdn20.info
dns5.cdn30.org
statusactive
registered 2006-04-28expires 2027-04-28
HTTPS certificatenot valid
validno
problemCould not resolve host (ENODATA)
DNSSECinsecure

Domain is not signed with DNSSEC

. → com → cdn20.com
Email authenticationpoor
SPFnone
DMARCnone
DKIMnone of 1 common selectors

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

Security scoregrade C · 105/190
Basic Security
20/40missing: DNSSEC Enabled
Record Security
0/45missing: CAA Records, SPF Record, DMARC Record, DKIM Presence
Advanced Security
5/25missing: Mail Server Configuration, SOA Record Configuration, IPv6 Support
Domain Reputation
35/35
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 2 lookups
SURBL MultidomainURIBL Multidomain

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=cdn20.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=cdn20.com"

MCP: add https://how.is/mcp to Claude, Codex or Cursor (one-line install) and ask for domain_trust on cdn20.com. Reference: /llms.txt.

Watch cdn20.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