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Total

DNS

Email

Security

Network

Availability

Domaincomcast.net

IPv41

IPv61

MX records8

StatusActive

Domain technical report

Access Denied

comcast.net

Generated: 2026-08-08T22:44:23-05:00 · Cached result

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IPv41

IPv61

MX8

NS5

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

1 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

5 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

✓

DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

8 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

✓

MTA-STS5 / 5 pts · Mail

Mail transport policy.

✓

TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

152 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers4 / 35 pts · Security

1 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: comcastnet-apex-anycast-1p.slb.comcast.com

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

HTTP response0 / 40 pts · Availability

HTTP/2 403

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

96.99.240.167

AAAA

1 record(s)

2001:558:feed:dc:96:99:240:167

CNAME

0 record(s)

—

Not configured

MX

8 record(s)

50 mx1h1.comcast.net.
50 mx2c1.comcast.net.
50 mx1a1.comcast.net.
50 mx2a1.comcast.net.
5 mx2.mxge.comcast.net.
50 mx2h1.comcast.net.
5 mx1.mxge.comcast.net.
50 mx1c1.comcast.net.

TXT

4 record(s)

"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"
"yahoo-verification-key=t0ftaXXV8MB1pon3jzauB3Fz5ezusB2l9jy3GVNPQRw="
"google-site-verification=gxiEHT6grgMJE52lhl4OYIt5Q3XpA5qt-8Okrxq-mcE"
"google-site-verification=g7KA0NF2z-1XIBz7vWW88zvVYlJeiG56UPOYHF2tqY0"

NS

5 record(s)

dns101.comcast.net.
dns103.comcast.net.
dns105.comcast.net.
dns102.comcast.net.
dns104.comcast.net.

SOA

1 record(s)

dns101.comcast.net. domregtech.comcastonline.com. 2008265320 7200 3600 1209600 900

CAA

0 record(s)

—

Not configured

DS

2 record(s)

40909 5 2 30C0F50E68DCC9A2F279A994C07CF22CED97AADF44C2B1FE38A1B32B A1A34174
40909 5 1 DDC19733884EE533B35B4B57717BEA9B0EF2C4D1

DNSKEY

3 record(s)

256 3 13 OJFXr6G1T8b4aoVQMpb2e2++ZVlJ+8ACu0ezrWNnGgcbr99Y1Cli9VIP +c6znHzz8M7DgHntHnRWeVNhmrM2jQ==
257 3 5 AwEAAcdTwXuKIERUoEaOHCEafPCgHW8Dq8OftDPD1sZCwCUH7VjfSXQp gvkYUG+6FN9INP2uHybzRe/m4EG8HD8zkKtaIBzrYZIcbchuXKZ5biwk j1hIMTGlDG0jD0j3rjiJkk3dDkygKvV8FswEJo9X7+CWbtf4WKgXqnd/ 2JcsliDK4XujFsw27eWpXlHZt5SuQb0N1jmMazESXwYJYtGXce5vi4pB hlE9OUgCQlkxPxedvaelT5hKxYP3lIH4vjBrKMzQE7OzoB4lOsJVhbvD F1VZUzC6n42w8WWvjBDY3TilOvsC9Je7DOD3yQlgcmiQ80PM4zknfQJ7 6APxYrrowTE=
256 3 5 AwEAAaL5YSosrqI3Gw+crTZtktP/H99NtLqVXkdkNwhqQgu01WuzHoNl OnBzJg1aDeMtIfcWC7raZ/dxXOP+9l0nMExV/TkbIpZ4Kbml3vRgO2Mv DnapUsr9E79FJ5qvQ9KMBSDszzlixPdLrKbmLoQvOAtOEz8mPqwZK3EI Fos2FHXb

RRSIG

7 record(s)

NS 5 2 7200 20260810173605 20260803143105 46530 comcast.net. h/87BAUyQ3llcg5Z1pnxNh8BzNiomjeOHa7UY3KRBOqKuircTUH8fHoP uB/YTNKp1qio1bWxAB0kysQV3LuFQgmWFiZHFq0jdCDoNUt1SAGYsAdc /8KclsHrbP/s3nHIlUCyLYgqycIoOzOjZhhwQozHzkRRHxmQz1sP28eo z0I=
NS 13 2 7200 20260810173605 20260803143105 28275 comcast.net. /C15sMYkbRgS32GukPq1i+OR8Ar1AvGsAcrsqzzf9b0/CisFcs/801qM Wn74MehG4dk8DP3OEQyhW/3kfg/Q4A==
TXT 5 2 7200 20260810173605 20260803143105 46530 comcast.net. N47q6so6uijKANaXdzpi1brfJYOikU156BMEHKAMaLcrqxIiL6mPSOxe zTQQ1wAYXhn22vVAcLPdRGrePt3mII5wpdkkf5xxUb0eAY6NcHzs69D+ ZDU/kstn1TLAvJBXaV8mvmZh50w5KhF6xPB24tNhpxsNAXBCE4K9tyTU w+I=
TXT 13 2 7200 20260810173605 20260803143105 28275 comcast.net. Lpatjtb54Qj6BFi98yivjytkBOzPEbahP2u9Yx4hBpZMqyckQ1AqU8ld hIAcxbIZdYlWx6gKM7Fn8KrOEqr3Sw==
A 5 2 300 20260810173605 20260803143105 46530 comcast.net. k08fHBdPH/yKndfZcYC2z4KPFfAm3sXgpysmdOzgOJsU+kyOZ0IRkR7D 2Foaqfoe/F+li5XggfFz5yg0X+5vO7VLnuyQ99x2Zol3U8GJYdsV1EgA e8EZGlAViqjOr1uqYkOitePY0lbiyu/7sQAh4TM1/JZMx76LKsiHeqBM 5tw=
A 13 2 300 20260810173605 20260803143105 28275 comcast.net. ueOrl5sXnRm4tGYy4w7uWFI/U6Rr45mHyjfG8+uvD35BunWZFkghy9sq vFHrQuD5hPu5HZSoMa6hEUcd4SdSwg==
DS 13 2 86400 20260814033731 20260807022731 7272 net. wPrWj4udEgmsgJLyUA0rD5Lf7wk4cJLPKqF2GBTVYLytTlkOrxNL9JTE VMRS5CB+PtaYRpS2ChJiLW9dVe9g6g==

NSEC

1 record(s)

12c.comcast.net. A NS SOA MX TXT AAAA RRSIG NSEC DNSKEY

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

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

Configured

v=DMARC1;p=reject;sp=reject;rua=mailto:dmarc-rua@dmarctest.comcast.net

DKIM

Not found

—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Access Denied

Description

Final URL

https://www.xfinity.com/

HTTP status

403

HTTP

Status

HTTP/2 403

Final URL

https://www.xfinity.com/

Version

Server

AkamaiGHost

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Sectigo Limited

comcast.net

Valid from

2026-06-23T19:00:00-05:00

Valid until

2027-01-08T17:59:59-06:00

Days remaining

152

Protocol

TLSv1.2

Cipher

ECDHE-RSA-AES256-GCM-SHA384

Security headers

1 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

—

X-Frame-OptionsNot detected

—

Referrer PolicyNot detected

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

96.99.240.167

34,57 ms

Cloudflare

1.1.1.1

96.99.240.167

27,22 ms

Quad9

9.9.9.9

96.99.240.167

47,86 ms

OpenDNS

208.67.222.222

96.99.240.167

51,40 ms

AdGuard

94.140.14.14

96.99.240.167

123,43 ms

IP, geolocation and ASNAssociated network information

96.99.240.167

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

mx1h1.comcast.net

Port 25: Closed/unreachable - 0.6 ms - 
Port 465: Closed/unreachable - 4005.4 ms - 
Port 587: Closed/unreachable - 4011.2 ms -

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