How is comcast.net?

Looks fine risk 0/100

Registered 29 years ago, on no blocklists we checked, valid HTTPS, the site answered 403 in 209 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

403

209 ms

HTTPS

74 d

left on a Sectigo Limited certificate

Age

29 years

registered 1997-09-25

Blocklists

listings across 5 lists

Everything we looked at

DNS records6 record types

A	96.99.240.167
AAAA	2001:558:feed:dc:96:99:240:167
MX	50 mx1a1.comcast.net 50 mx2a1.comcast.net 5 mx2.mxge.comcast.net 50 mx1c1.comcast.net 5 mx1.mxge.comcast.net 50 mx1h1.comcast.net 50 mx2h1.comcast.net 50 mx2c1.comcast.net
NS	dns103.comcast.net dns101.comcast.net dns102.comcast.net dns104.comcast.net dns105.comcast.net
TXT	v=spf1 ip4:96.103.146.48/28 ip4:96.102.19.32/28 ip4:96.102.200.0/28 include:_spfv6.comcast.net include:_spf.mdp.comcast.net include:_ipspf.yahoo.com ~all google-site-verification=g7KA0NF2z-1XIBz7vWW88zvVYlJeiG56UPOYHF2tqY0 yahoo-verification-key=t0ftaXXV8MB1pon3jzauB3Fz5ezusB2l9jy3GVNPQRw= google-site-verification=gxiEHT6grgMJE52lhl4OYIt5Q3XpA5qt-8Okrxq-mcE
CAA	{'type': 'CAA', 'issue': 'sectigo.com', 'critical': 0}

RegistrationCSC Corporate Domains, Inc.

registrar	CSC Corporate Domains, Inc.
registered	1997-09-25
expires	2027-09-24
last changed	2026-09-20
owner	Comcast Corporation
nameservers	dns101.comcast.net dns102.comcast.net dns103.comcast.net dns104.comcast.net dns105.comcast.net
status	client transfer prohibited server delete prohibited server transfer prohibited server update prohibited

registered 1997-09-25expires 2027-09-24

HTTPS certificate74 days left

valid	yes
issuer	Sectigo Limited
covers	comcast.net
protocol	TLSv1.2

issued 2026-06-24expires 2027-01-08

DNSSECsecure

Domain is properly signed — chain validated by an independent validating resolver

. → net → comcast.net

Email authenticationgood

SPF	pass `v=spf1 ip4:96.103.146.48/28 ip4:96.102.19.32/28 ip4:96.102.200.0/28 include:_spfv6.comcast.net include:_spf.mdp.comcast.net include:_ipspf.yahoo.com ~all`
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 A · 175/205

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

45/45missing: DKIM Presence

Advanced Security

25/25

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 5 lookups

SURBL MultidomainURIBL MultidomainSpamCop96.99.240.167Barracuda96.99.240.167UCEPROTECT Level 196.99.240.167

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=comcast.net" \ -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=comcast.net"

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

Watch comcast.net. 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