AS13709 — CUMULUS-MEDIA-INC

AS13709 announces 1 IPv4 prefixes covering 8,192 addresses and 0 IPv6 prefixes.

About this network

Twelve prefixes that tile one contiguous range exactly, announced to a single upstream.

What it's used for

• A radio broadcaster's network. 8,192 addresses across twelve IPv4 prefixes, one observed BGP neighbour, and no IPv6 announced.

Notable

• All twelve prefixes sit inside 216.234 and abut with no gaps, covering one contiguous range.
• Sizes run from /21 down to /24, including pairs of /24s that sit inside ranges already announced as a /23.
• Every block is netname CMLS-ATL, an abbreviation of the company plus a city code.
• 216.234.30.254 answers as v10.webstack.cumulusmedia.net and 216.234.1.126 as gsm7212.cumulusmedia.net.

Interesting

• Twelve announcements over one upstream is the clearest case of routing fragmentation with no benefit attached. Splitting prefixes buys traffic engineering only when there is more than one path, and here there is not. The whole range could travel as one entry.
• The second hostname is a switch model number, so the reverse zone names the hardware. Anyone reading it learns the vendor and the exact model handling that address.
• The first begins with a letter and a number, the usual way to write a network segment, followed by the name of the stack it belongs to. Both names were written for internal use and are public.

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

Announced prefixes

• 216.234.0.0/19

Upstream networks

• AS13767 DataBank Holdings, Ltd.

Adjacent networks

• AS13767 DataBank Holdings, Ltd.