How is windowsupdate.com?

Be careful risk 20/100

Registered 29 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

29 years

registered 1997-07-22

Blocklists

listings across 2 lists

Everything we looked at

DNS records2 record types

NS	ns3-205.azure-dns.org ns2-205.azure-dns.net ns4-205.azure-dns.info ns1-205.azure-dns.com
CAA	{'type': 'CAA', 'critical': 0, 'contactemail': 'caarecordaware@microsoft.com'}

RegistrationCSC Corporate Domains, Inc.

registrar	CSC Corporate Domains, Inc.
registered	1997-07-22
expires	2027-07-21
last changed	2026-02-25
owner	Microsoft Corporation
nameservers	ns1-205.azure-dns.com ns2-205.azure-dns.net ns3-205.azure-dns.org ns4-205.azure-dns.info
status	client transfer prohibited server delete prohibited server transfer prohibited server update prohibited

registered 1997-07-22expires 2027-07-21

HTTPS certificatenot valid

valid	no
problem	Could not resolve host (ENODATA)

DNSSECinsecure

Domain is not signed with DNSSEC

. → com → windowsupdate.com

Email authenticationpoor

SPF	none
DMARC	pass policy reject
DKIM	none of 1 common selectors

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

Security scoregrade B · 140/190

Basic Security

20/40missing: DNSSEC Enabled

Record Security

30/45missing: SPF Record, DKIM Presence

Advanced Security

10/25missing: Mail Server 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=windowsupdate.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=windowsupdate.com"

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

Watch windowsupdate.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