HOW.IS
?

How is comcast.com?

Be careful risk 20/100

Registered 31 years ago, on no blocklists we checked, no valid HTTPS certificate, the site did not answer (ConnectionRefusedError).

Why

02050100
finecarefulhigh risk
  • +20No valid HTTPS certificate.

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

Site
down
ConnectionRefusedError
HTTPS
invalid
connect ECONNREFUSED 96.99.227.0:443
Age
31 years
registered 1995-08-29
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records4 record types
A96.99.227.0
MX5 mxb-00143702.gslb.pphosted.com
5 mxa-00143702.gslb.pphosted.com
NSdns102.comcast.net
dns104.comcast.net
dns103.comcast.net
dns105.comcast.net
dns101.comcast.net
TXTpaloaltonetworks-site-verification=b6c919476067691db128e9375b002b801db8ab2a1de767bc27acb829530c59bd
profound-domain-verification-vh36j1=w4FHsBpTcpJvtwcZgZKLzPCRk
paloaltonetworks-site-verification=b51e185f274a13eccff6f0e001549d4a2f08fc11c599ffde8f295cc7cf4c3138
smartsheet-site-validation=x1Hv84--jB9jvo7M0QQviDXPy_81zS_t
atlassian-domain-verification=J+tB36tc4CyLsnqZ/MTW5tI3SZ+IOFAGTWEgMbo+FLRl+gvI4cSIQmMmTYOPEbTz
pexip-ms-tenant-domain-verification=31cff1f1-d4b6-492b-8d98-5b42f38c3949
atlassian-domain-verification=C34TI2IiJOrziv9uyV2Yva6ZoRRCSZPjqc15wZASQfypHgNMl6esmkpDsYYXhjk7
airtable-verification=00fd4b2a11b394abba9d040c40502707
snowflake-verification=5bf2f458-019f-1000-8b08-000000000420
airtable-verification=d9386eea22fce5ee0d01209512aa7706
openai-domain-verification=dv-z3jR2RoYFRLipmXTqN9mx5hU
autodesk-domain-verification=9qi_qkHrCGa8onVbz33s
airtable-verification=31e52307c66bf62d16697b7f0439d35e
vertexinc-cloud-208b00fd-6b0a-43ae-8e00-1ee7ab817d66
lucidlink-verification=C2SQJ938H6WG1S7VTCG7CQWX6R
mongodb-site-verification=ucqyDX29txaTTi3K4euWVtieT0zCXRrg
jamf-site-verification=dhyRo-LWGQSaI_eP_MgF6A
airtable-verification=709aa8e31ed274aa8abc0f3a9286141f
docker-verification=f79a60d9-69ec-4c26-8d54-0165c0943613
1password-site-verification=3BCX5ACVKBD73ADOMJ5XWM7JJ4
amazonses:RYuDm+T3xJC87y0v4Cj4JlDm9d5enVzIZcr/arCF7J0=
adobe-idp-site-verification=8c9c59d410322404f7d75a0b3c770ce7b87cf141707b58224143253e1149f489
docusign=8fb076b3-05e6-41c4-a6ee-6f6227be4b11
facebook-domain-verification=f1zw72g52fjiesmld6xtuj467pl7f5
v=spf1 ip4:148.163.145.77 ip4:148.163.141.77 ip4:162.150.44.71 ip4:96.114.158.212 ip4:68.87.31.167 ip4:68.87.96.15 ip4:96.114.28.75 ip4:96.114.28.76 ip4:67.231.157.49 ip4:67.231.149.53 ip4:192.28.144.202 include:spfext.zapproved.com include:_spf.mdp.comcast.net include:_spf.comcast.com include:spf-00143705.pphosted.com ~all
atlassian-domain-verification=xhDGO0SgEPXcuSpqqvu7kAzZyKrM2pat53VPEt5XvKGHvOq4ErhUFRioLG98Ndh3
airtable-verification=644c0c83b6807a2a10c20d4cf57505d7
eYZbzQ91r/pvvnV/FdrbHyREx7EaAwWLeNYk/EMQrJiGpNCsX4tJcWlHJDFzifTDbfnlhI6koqrm0dYgkIfncg==
apple-domain-verification=XRKeuEf5cWtc2oDC
pendo-domain-verification=XM4f85DQvo0VLA8QzSh-M0bjGEs
aws-domain-verification=c326827a-0d9a-4061-a35d-1ea2a8afc6f5
al0yn+08kj3q/n1E+s02ttnE5Fd9gIjwjjbn4mCggizGLJepyQ7cMxRTgw4RxYVoZ965qJIHfnH0966SxaicMw==
intersight=3c7c5c60389a6b81830ef696f8761bc121ecf3f10d7cf8eef08f66af90451a8f
browserstack-domain-verification=e23475d1-ef64-4cf7-bf92-7620239fe86a
vertexinc-cloud-e3114068-91a7-4c75-9497-3b774c7f4edf
apple-domain-verification=VNdTgwsxrDHE4eJM
teamviewer-sso-verification=4a24e296450940f48ac4faba9a172fc0
gitkraken-domain-verification=82a0c351cecd44e7da8f5254930e2b9f4508718255d575583f48949e4a887399
atlassian-domain-verification=n+yfnu4Su0J6uQkiatjL+lTNjzOZrPUGOpVn+HiHPwwDgMivjJD5Pwg7yzepfmIC
bluebeam-verification=1t8stncnxzduj5vzylu1on0ziyj5lj
3587620
docusign=0ead29a6-1c9c-4b0c-865a-85a5a127e776
google-site-verification=XdqEZdbhoNgKou31_aOrVN98TKJqxC0Ve3hNPBmSM7M
RegistrationCSC Corporate Domains, Inc.
registrarCSC Corporate Domains, Inc.
registered1995-08-29
expires2027-08-28
last changed2026-08-24
ownerComcast Corporation
nameserversdns101.comcast.net
dns102.comcast.net
dns103.comcast.net
dns104.comcast.net
dns105.comcast.net
statusclient transfer prohibited
server delete prohibited
server transfer prohibited
server update prohibited
registered 1995-08-29expires 2027-08-28
HTTPS certificatenot valid
validno
problemconnect ECONNREFUSED 96.99.227.0:443
DNSSECsecure

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

. → com → comcast.com
Email authenticationexcellent
SPFpass v=spf1 ip4:148.163.145.77 ip4:148.163.141.77 ip4:162.150.44.71 ip4:96.114.158.212 ip4:68.87.31.167 ip4:68.87.96.15 ip4:96.114.28.75 ip4:96.114.28.76 ip4:67.231.157.49 ip4:67.231.149.53 ip4:192.28.144.202 include:spfext.zapproved.com include:_spf.mdp.comcast.net include:_spf.comcast.com include:spf-00143705.pphosted.com ~all
DMARCpass policy reject
DKIMfound: k1, s1, s2

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

Security scoregrade B · 155/205
Basic Security
10/40missing: DNSSEC Enabled, Nameserver Diversity
Record Security
30/45missing: CAA Records, DKIM Presence
Advanced Security
20/25missing: IPv6 Support
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 5 lookups
SURBL MultidomainURIBL MultidomainSpamCop96.99.227.0Barracuda96.99.227.0UCEPROTECT Level 196.99.227.0

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.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=comcast.com"

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

Watch comcast.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