Skip to main content
user_pczknp
1st Topic

Visitor

 • 

2 Messages

Thursday, July 9th, 2026 6:41 PM

Domain blocked at network level — need Tier 2 / escalation.

I own a website and it is blocked at the network level.

Diagnostics so far:

  • Traceroute from my Comcast connection completes all hops through Comcast's own network (Littleton, CO → Denver → Ashburn, VA), then times out immediately after leaving Comcast's network toward the server.
  • Test-NetConnection to port 443 fails both ping and TCP connect (PingSucceeded: False, TcpTestSucceeded: False) specifically from the Comcast connection.
  • I've confirmed 74.91.139.2 is not listed on Spamhaus, MXToolbox (full check), or AbuseIPDB — so this doesn't appear to be a public blacklist issue.
  • I've ruled out local causes on my end: flushed DNS, rebooted my router, disabled Xfinity Advanced Security — none of this changed the result.
  • One note: a WHOIS lookup on 74.91.139.2 shows the IP block registered to "Nuclearfallout Enterprises, Inc." rather than Network Solutions directly. Not sure if that's expected (e.g., leased infrastructure) or relevant, but flagging it in case it helps your team trace the routing.

Question

 • 

Updated 

17 minutes ago

10

1

0

Oldest First
Selected Oldest First
XfinityJohnG

Official Employee

 • 

2.9K Messages

1 hour ago

Thank you for reaching out to our team here. You can have the security team check on any blocked website issue at the https://spa.xfinity.com/help site. That team would be the best option to get that resolved. 

2

0

user_pczknp

Visitor

 • 

2 Messages

Subject: Domain blocked at network level — need Tier 2 / escalation

I own the website seedingtherockies.com, hosted at IP 74.91.139.2. On my home Xfinity connection, this domain fails to load with ERR_CONNECTION_TIMED_OUT. I've confirmed the following:

  • DNS resolves correctly to 74.91.139.2
  • Traceroute shows all hops succeed through Comcast's network (Littleton → Denver → Ashburn, VA), then fail immediately after leaving Comcast's network
  • Test-NetConnection shows both ping and TCP port 443 fail — PingSucceeded: False, TcpTestSucceeded: False
  • The site loads fine on cellular data and from outside my network
  • I disabled xFi Advanced Security, flushed DNS, and rebooted my router — none of this resolved it
  • I've confirmed the IP is not listed on Spamhaus, MXToolbox (full check, no flags), or AbuseIPDB — ruling out a public blacklist as the cause
  • I've also contacted my hosting provider (Network Solutions), who confirmed no blocks on their end and are following up with their underlying infrastructure provider — this further points to the issue being on the network path, possibly Comcast's side

Since public blacklists are clear and my hosting provider has ruled out a block on their end, this strongly points to either an internal Comcast security filter or a routing/peering issue specific to my hosting provider's upstream network. As the site owner, I'd like this escalated to your network operations or security team to investigate and correct if it's a false positive.

Like

Reply

40 minutes ago

0

XfinityJohnG

Official Employee

 • 

2.9K Messages

If you have already reached out to the security team at the https://spa.xfinity.com/help site, and they were not able to resolve that issue, I can escalate that from here. Can you send me a direct message with the full name and complete address for your service? To send a direct message. 

• Click "Sign In" if necessary

• Click the "Direct Message” icon (upper right corner of this page)

• Click the "New message" (pencil and paper) icon

• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list

• Type your message in the text area near the bottom of the window

• Press Enter to send your message

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please mark as Best Answer.tick

Like

Reply

17 minutes ago

0

forum icon

New to the Community?

Start Here