How is mathtag.com?

Be careful risk 20/100

Registered 19 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

19 years

registered 2007-12-13

Blocklists

listings across 2 lists

Everything we looked at

DNS records3 record types

MX	10 mathtag-com.mail.protection.outlook.com
NS	ns-1469.awsdns-55.org ns-274.awsdns-34.com ns-1742.awsdns-25.co.uk ns-554.awsdns-05.net
TXT	v=spf1 include:spf.protection.outlook.com -all fastly-domain-delegation-733011-2024118 w6w6z6qjhwlvw5t4fctdqzy5qrqpzz6j MS=ms19540014 _globalsign-domain-verification=Fw09cFhmPL_-Bfg6BV5_NkyDEkXJfmQd4uPViX560A

RegistrationTucows Domains Inc.

registrar	Tucows Domains Inc.
registered	2007-12-13
expires	2026-12-13
last changed	2026-06-01
owner	Contact Privacy Inc. Customer 0140394076
nameservers	ns-1469.awsdns-55.org ns-1742.awsdns-25.co.uk ns-274.awsdns-34.com ns-554.awsdns-05.net
status	client transfer prohibited client update prohibited

registered 2007-12-13expires 2026-12-13

HTTPS certificatenot valid

valid	no
problem	Could not resolve host (ENODATA)

DNSSECinsecure

Domain is not signed with DNSSEC

. → com → mathtag.com

Email authenticationpoor

SPF	pass `v=spf1 include:spf.protection.outlook.com -all`
DMARC	none
DKIM	none of 1 common selectors

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

Security scoregrade C · 130/190

Basic Security

20/40missing: DNSSEC Enabled

Record Security

15/45missing: CAA Records, DMARC Record, DKIM Presence

Advanced Security

15/25missing: 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=mathtag.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=mathtag.com"

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

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

Watch mathtag.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