How is javsub.blog?

Be careful risk 40/100

Registered 2 years ago, listed on 1 blocklist, valid HTTPS, the site answered 403 in 337 ms.

Why

02050100

finecarefulhigh risk

+40Listed on 1 spam/abuse blocklist(s).

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

403

337 ms

HTTPS

78 d

left on a Let's Encrypt certificate

Age

2 years

registered 2024-08-22

Blocklists

listings across 5 lists

Everything we looked at

DNS records3 record types

A	91.232.105.20
NS	romina.ns.cloudflare.com tadeo.ns.cloudflare.com
TXT	google-site-verification=ymlCDt3eYqJrDi9UqpaR5wBDJbeJK3xQrYx8JfmLUv8

RegistrationKey-Systems LLC

registrar	Key-Systems LLC
registered	2024-08-22
expires	2027-08-22
last changed	2026-08-25
nameservers	romina.ns.cloudflare.com tadeo.ns.cloudflare.com
status	client transfer prohibited

registered 2024-08-22expires 2027-08-22

HTTPS certificate78 days left

valid	yes
issuer	Let's Encrypt
covers	javsub.blog
protocol	TLSv1.3

issued 2026-10-19expires 2027-01-17

DNSSECinsecure

Domain is not signed with DNSSEC

. → blog → javsub.blog

Email authenticationpoor

SPF	none
DMARC	none
DKIM	none of 1 common selectors

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

Security scoregrade D · 105/205

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

0/45missing: CAA Records, SPF Record, DMARC Record, DKIM Presence

Advanced Security

10/25missing: Mail Server Configuration, IPv6 Support

Domain Reputation

40/50missing: IP Blacklist Status

Threat Detection

45/45missing: Domain Age Check

Blocklists1 listing · 5 lookups

SURBL MultidomainURIBL MultidomainSpamCop91.232.105.20Barracuda91.232.105.20UCEPROTECT Level 191.232.105.20

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=javsub.blog" \ -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=javsub.blog"

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

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

Watch javsub.blog. 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