HOW.IS
?

How is markmonitor.com?

Looks fine risk 0/100

Registered 28 years ago, on no blocklists we checked, valid HTTPS, the site answered 403 in 67 ms.

Why

02050100
finecarefulhigh risk
  • ·Nothing in the checks added risk.

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

How markmonitor.com looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
403
67 ms
HTTPS
33 d
left on a DigiCert Inc certificate
Age
28 years
registered 1999-04-23
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records5 record types
A104.18.39.152
172.64.148.104
MX0 markmonitor-com.mail.protection.outlook.com
NSha4.markmonitor.zone
ha2.markmonitor.zone
ns7.markmonitor.com
ns5.markmonitor.com
ns4.markmonitor.com
ns6.markmonitor.com
ns1.markmonitor.com
ns3.markmonitor.com
ns2.markmonitor.com
TXTv=spf1 include:spf1.markmonitor.com include:spf2.markmonitor.com -all
onetrust-domain-verification=8fa95c5bed48415db6eff59daea56015
MS=ms64044723
figma-domain-verification=2e293493781f666d9f740db6351c2e614e18ca7326ae088750eaef03a268e1e3-1780592319
google-site-verification=E2u1YzHLf2tBYBPtKA53nJJU8CxqvETi9tCgrStrHSE
anthropic-domain-verification-xr4p7r=vm66XcxCsZpsLKCoCSXpk9kVJ
MS=ms72445593
google-site-verification=GZUp3F-aoKxu2bX09NyuMPTi-LXAC-qID0GhrRmddog
0DuNVXCw+Ru0wk/l1QQLpIrBqVp0lV/Sq6AYcat5UGoDXbEm3DJi3zGniT7Yc70rlPXm/L96RJ7ZUSH9MTf/tw==
logmein-verification-code=ANmgyb4yoduCdzD71JRmCSyp2
google-site-verification=avfMNTcfZbndF_OIvDLsN68e2gYdCy3NWlLmimTCgzQ
MS=ms42144968
webexdomainverification.5523f43614297acbe053ab06fc0a5471=b0c2366e-7287-438d-af3f-0c171d193a5e
knowbe4-site-verification=2196cd8a72de50eedd7703120b752b77
apple-domain-verification=FX0lMIb10qXybAtV
atlassian-domain-verification=dR54hdBGcAY38atM4taIqZJLlvlrBCd/n59SadEcujjC/aBmtG1AROhlD5kUGm8q
pardot1105752=05d648070e9b5bbc55dad335bec3d2686884b760e15145b02655f8b1fbc275e0
CAA{'type': 'CAA', 'issue': 'pki.goog', 'critical': 0}
{'type': 'CAA', 'issue': 'letsencrypt.org', 'critical': 0}
{'type': 'CAA', 'issue': 'digicert.com', 'critical': 0}
RegistrationMarkMonitor Inc.
registrarMarkMonitor Inc.
registered1999-04-23
expires2032-04-23
last changed2024-01-18
ownerREDACTED FOR PRIVACY
nameserversha2.markmonitor.zone
ha4.markmonitor.zone
ns1.markmonitor.com
ns2.markmonitor.com
ns3.markmonitor.com
ns4.markmonitor.com
ns5.markmonitor.com
ns6.markmonitor.com
ns7.markmonitor.com
statusclient delete prohibited
client transfer prohibited
client update prohibited
server delete prohibited
server transfer prohibited
server update prohibited
registered 1999-04-23expires 2032-04-23
HTTPS certificate33 days left
validyes
issuerDigiCert Inc
coverswww.markmonitor.com, markmonitor.com
protocolTLSv1.3
issued 2026-05-15expires 2026-11-29
DNSSECinsecure

Domain is not signed with DNSSEC

. → com → markmonitor.com
Email authenticationexcellent
SPFpass v=spf1 include:spf1.markmonitor.com include:spf2.markmonitor.com -all
DMARCpass policy quarantine
DKIMfound: selector1, selector2

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

Security scoregrade A · 175/205
Basic Security
20/40missing: DNSSEC Enabled
Record Security
45/45missing: DKIM Presence
Advanced Security
15/25missing: Mail Server Configuration, IPv6 Support
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 8 lookups
SURBL MultidomainURIBL MultidomainSpamCop104.18.39.152Barracuda104.18.39.152UCEPROTECT Level 1104.18.39.152SpamCop172.64.148.104Barracuda172.64.148.104UCEPROTECT Level 1172.64.148.104

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=markmonitor.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=markmonitor.com"

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

Watch markmonitor.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