How is w3schools.com?

Looks fine risk 0/100

Registered 27 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 333 ms.

Why

02050100

finecarefulhigh risk

·Nothing in the checks added risk.

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

The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.

Site

200

333 ms · ends at www.w3schools.com

HTTPS

120 d

left on a Amazon certificate

Age

27 years

registered 2000-03-21

Blocklists

listings across 4 lists; 1 did not answer

Everything we looked at

DNS records4 record types

A	13.248.240.135 76.223.115.82
MX	10 feedback-smtp.eu-west-1.amazonses.com 5 alt2.aspmx.l.google.com 10 alt3.aspmx.l.google.com 1 aspmx.l.google.com 5 alt1.aspmx.l.google.com 10 alt4.aspmx.l.google.com
NS	ns-1409.awsdns-48.org ns-314.awsdns-39.com ns-1939.awsdns-50.co.uk ns-769.awsdns-32.net
TXT	v=spf1 include:_spf.google.com include:amazonses.com include:spf.sendinblue.com include:shops.shopify.com include:mail.zendesk.com ip4:148.122.215.227 -all MS=338A1134735F428FF6729DDF746385742F152781 amazonses:9O9JMU+QwMbQv3k+hYpAmauno4fuJMUcWephofXN0yc= Sendinblue-code:c1cb221c990a3b197b84632af64eb12a google-site-verification=9Wi0rp8KXQ3oB2KWvpcLIbwMdqFvyZe8QmOH0YnON4g apple-domain-verification=iGza4rmAk4yMj4vi linkedin-site-verification=d7833fa0-3fe5-49fb-ab0e-f34e3749c6f5

RegistrationAmazon Registrar, Inc.

registrar	Amazon Registrar, Inc.
registered	2000-03-21
expires	2027-03-21
last changed	2026-05-15
owner	c/o whoisproxy.com
nameservers	ns-1409.awsdns-48.org ns-1939.awsdns-50.co.uk ns-314.awsdns-39.com ns-769.awsdns-32.net
status	client transfer prohibited

registered 2000-03-21expires 2027-03-21

HTTPS certificate120 days left

valid	yes
issuer	Amazon
covers	w3schools.com
protocol	TLSv1.2

issued 2026-01-31expires 2027-02-28

DNSSECinsecure

Domain is not signed with DNSSEC

. → com → w3schools.com

Email authenticationexcellent

SPF	pass `v=spf1 include:_spf.google.com include:amazonses.com include:spf.sendinblue.com include:shops.shopify.com include:mail.zendesk.com ip4:148.122.215.227 -all`
DMARC	pass policy reject
DKIM	found: google, mail

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

Security scoregrade B · 165/205

Basic Security

20/40missing: DNSSEC Enabled

Record Security

30/45missing: CAA Records, DKIM Presence

Advanced Security

20/25missing: IPv6 Support

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 8 lookups

SURBL MultidomainURIBL MultidomainSpamCop13.248.240.135Barracuda13.248.240.135UCEPROTECT Level 113.248.240.135SpamCop76.223.115.82Barracuda76.223.115.82UCEPROTECT Level 176.223.115.82

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=w3schools.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=w3schools.com"

MCP: add https://how.is/mcp to Claude, Codex or Cursor (one-line install) and ask for domain_trust on w3schools.com. Reference: /llms.txt.

IPv6. Does w3schools.com work over IPv6? See the live check on aaaa.bot — website, mail and nameservers, graded A–F.

Watch w3schools.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