How is xfinity.com?

Looks fine risk 0/100

Registered 24 years ago, on no blocklists we checked, valid HTTPS, the site answered 403 in 148 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

148 ms

HTTPS

172 d

left on a Sectigo Limited certificate

Age

24 years

registered 2003-01-23

Blocklists

listings across 5 lists

Everything we looked at

DNS records5 record types

A	96.99.240.155
AAAA	2001:558:feed:dc:96:99:240:155
MX	5 mx1c1.comcast.net 5 mx2a1.comcast.net 5 mx2c1.comcast.net 5 mx1h1.comcast.net 5 mx2h1.comcast.net 5 mx1a1.comcast.net
NS	dns104.comcast.net dns103.comcast.net dns105.comcast.net dns102.comcast.net dns101.comcast.net
TXT	google-site-verification=TdiYkU4LcqtDvZoxDOjjUQwrrUnjS0wTKriu25iH-38 v=spf1 -all _j1ncje2qqdf6r89itljcpdy9ybjj8w3 google-site-verification=KqEt_C6gzuYBzr08xM7T6e5yXNmsxUAMu8ZtNQejaCs google-site-verification=jbytp59dW82AQqr9wK5V9-uZhr0wXrCJ7n9U3mUilQg apple-domain-verification=XqlyQica-2VyxgDz4zdPt1gCVxZ9oHyW13971aF8rbY

RegistrationCSC Corporate Domains, Inc.

registrar	CSC Corporate Domains, Inc.
registered	2003-01-23
expires	2027-01-23
last changed	2026-07-15
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 2003-01-23expires 2027-01-23

HTTPS certificate172 days left

valid	yes
issuer	Sectigo Limited
covers	xfinity.com
protocol	TLSv1.2

issued 2026-10-05expires 2027-04-21

DNSSECsecure

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

. → com → xfinity.com

Email authenticationgood

SPF	pass `v=spf1 -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 B · 160/205

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

30/45missing: CAA Records, DKIM Presence

Advanced Security

25/25

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 5 lookups

SURBL MultidomainURIBL MultidomainSpamCop96.99.240.155Barracuda96.99.240.155UCEPROTECT Level 196.99.240.155

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=xfinity.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=xfinity.com"

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

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

Watch xfinity.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