Reserved (RFC 1918)
10.0.0.0/8 is the largest of the three RFC 1918 private blocks, containing 16,777,216 addresses. It is favored by larger networks: medium-to-large offices, ISP-managed home routers (Xfinity/Comcast), and many VPN providers. 10.0.0.1 is a typical gateway choice within this space.
Xfinity/Comcast-issued routers default to 10.0.0.1. Browse to it from your home network to access router settings. Office networks may also expose firewall or wireless controller admin interfaces at 10.0.0.1.
RFC 1918 defines 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 as private address blocks. None of these are routed on the public internet. Networks using the 10/8 space typically subnet it (e.g., 10.0.1.0/24, 10.10.0.0/16) for departmental or geographic segmentation.
Probably, though not exclusively. Xfinity’s default is 10.0.0.1. Other ISPs and routers use it too.
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