ISP

May 27, 2019

This page provides details on important information relating to the ISP I use. To benefit others, it also contains any information from past ISPs that might still be useful.

Comcast Business

While living in Westminster, my ISP was Comcast Business. This was activated on 2016-10-11.

Here are the connection details:

  • Gateway IP Address: 96.86.32.142
  • Subnet Mask: 255.255.255.248
  • Static IPv4 Block CIDR: 96.86.32.136/29
  • Static IPv4 Addresses:
    • 96.86.32.137: eddings.justdavis.com (main IP)
    • 96.86.32.138: piers.justdavis.com
    • 96.86.32.139: eddings.justdavis.com (VPN gateway)
    • 96.86.32.140
    • 96.86.32.141
  • Static IPv6 Block CIDR: 2603:3003:5207:ad00::/56

Optimum/CableVision

While living in Brooklyn, my internet connection is on an Optimum Business plan. This was activated somewhere around 2013-07-01.

Here are the details of connection:

  • Assigned Subnet: 47.21.207.48
  • Subnet Mask: 255.255.255.248
  • Default Gateway: 47.21.207.49
  • DNS Servers: 167.206.112.138, 167.206.7.4
  • Static IPs: 5
    • 47.21.207.50: (home network/router)
    • 47.21.207.51: Eddings
    • 47.21.207.52: Piers
    • 47.21.207.53
    • 47.21.207.54

Reverse DNS

Reverse DNS for Optimum static IPs can be managed at the following page: https://business.optimum.net/internet/networkconfig.

Verizon FiOS

While living in the Baltimore area, my internet connection is on a Verizon FiOS business plan. This was activated on 2014-07-01.

Here are the details of connection:

  • Speed: 50/25
  • IP Range: 96.244.76.234 through 96.244.76.238
  • Subnet Mask: 255.255.255.0
  • Default Gateway: 96.244.76.1
  • DNS Servers: 71.242.0.12, 71.252.0.12
  • Static IPs (5):
    • 96.244.76.234: (home network/router)
    • 96.244.76.235: Eddings
    • 96.244.76.236: Piers
    • 96.244.76.237
    • 96.244.76.238

Reverse DNS

Reverse DNS for FiOS static IPs can be managed via email at help4u@verizon.com or dns@verizon.com.

Changing IP Address

The following topics have sections on how to handle the IP address changes necessary as part of the switch to FiOS: