AS18615 — MAINSTREAM-FIBER

AS18615 announces 8 IPv4 prefixes covering 38,400 addresses and 1 IPv6 prefixes.

About this network

MAINSTREAM-FIBER is operated by Mainstream Fiber Networks, LLC.

What it's used for

• The address space carries residential fiber-to-the-home services, evidenced by reverse DNS entries such as 23-252-11-254-cstmr.msfiber.net and netnames like MFN-CGNT-NET-1.
• The AS announces 38,400 IPv4 addresses across 8 prefixes and 1 IPv6 prefix, while maintaining 12 observed neighbours; this ratio of high address volume to moderate peering suggests an access network serving end-users rather than a transit provider.

Notable

• All RDAP registrants for the announced prefixes are listed as Mainstream Fiber Networks, LLC, aligning perfectly with the AS holder.
• The inventory consists of eight distinct IPv4 blocks, including a large /18 and several /20s and /21s, indicating a consolidated corporate estate for its fiber infrastructure.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 23.252.0.0/20
• 38.2.0.0/19
• 38.194.0.0/18
• 74.116.20.0/22
• 147.160.8.0/21
• 149.20.248.0/21
• 163.182.176.0/20
• 206.126.242.0/23
• 2607:1c80::/32

Upstream networks

• AS174 Cogent Communications, LLC
• AS6461 Zayo Bandwidth
• AS6939 Hurricane Electric LLC
• AS14907 Wikimedia Foundation Inc.
• AS971 PureVoltage Hosting Inc.
• AS25091 IP-Max SA

Adjacent networks

• AS174 Cogent Communications, LLC
• AS6461 Zayo Bandwidth
• AS6939 Hurricane Electric LLC
• AS14907 Wikimedia Foundation Inc.
• AS971 PureVoltage Hosting Inc.
• AS25091 IP-Max SA

Internet exchanges

• DE-CIX Dallas — Dallas, United States
• DE-CIX Chicago — Chicago, United States
• FD-IX - Indianapolis — Indianapolis, United States