subnet.im

AS15235The Old Mountain Company Inc.

United StatesRegistryARIN

As of 24th October 2026, AS15235 (The Old Mountain Company Inc.), a network registered in the United States with ARIN, originates 1 IPv4 prefix covering 256 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 59,186th-largest of the 79,671 networks we see originating IPv4, and the 12,888th-largest of 18,487 in the United States. It is seen behind 1 upstream network, most often AS174 (Cogent Communications, LLC). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

1

IPv6 prefixes

1

IPv4 addresses

256

IPv6 /64s

65.5k

Upstream graph

The networks AS15235 is seen behind, one and two hops out, drawn from real AS paths.

AS15235Toward the internet core
Upstream graph for AS15235: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS15235The Old Mountain …This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…

Networks observed one and two hops upstream of AS15235 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

3

adjacent networks

Upstreams
133%
Peers
267%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS15235
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer133133

Prefixes

The largest blocks AS15235 originates, widest first.

Largest prefixes originated by AS15235
PrefixAddressesVisibility
38.119.44.0/2425675/76
2001:550:5c07::/4865.5k × /6458/63

Routing health

How AS15235's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%2

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 24th Sept 2026.

No announcement by AS15235 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.