subnet.im

AS399855Keystone REN, LLC

United StatesRegistryARIN

As of 23rd October 2026, AS399855 (Keystone REN, LLC), a network registered in the United States with ARIN, originates 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 48,614th-largest of the 79,652 networks we see originating IPv4, and the 10,384th-largest of 18,475 in the United States. It is seen behind 4 upstream networks, most often AS11164 (Internet2 I2PX) and AS6939 (Hurricane Electric LLC), and in front of 28 downstream networks. 67% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 33% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

2

IPv6 prefixes

1

IPv4 addresses

512

IPv6 /64s

16.8M

Upstream graph

The networks AS399855 is seen behind, one and two hops out, drawn from real AS paths.

AS399855Toward the internet core
Upstream graph for AS399855: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS399855Keystone REN, LLCThis networkAS6939Hurricane Electri…AS11164Internet2 I2PXAS11537Internet2AS396955Internet2AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS2152CENIC - CalRENAS2497Internet Initiati…AS293ESnetAS2153CENICAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)

Networks observed one and two hops upstream of AS399855 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

64

adjacent networks

Upstreams
46%
Peers
3250%
Downstreams
2844%

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

Upstreams of AS399855
NetworkCountryRelationshipPathsVantage pts
AS11164Internet2 I2PXUSPeer39038
AS6939Hurricane Electric LLCUSPeer33632
AS11537Internet2USPeer2082
AS396955Internet2USPeer6161

Prefixes

The largest blocks AS399855 originates, widest first.

Largest prefixes originated by AS399855
PrefixAddressesVisibility
164.153.140.0/2425677/77
174.34.252.0/242568/77
2602:f9a4::/4016.8M × /6434/64

Routing health

How AS399855'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

  • Valid66.7%2
  • Invalid0.0%0
  • No ROA33.3%1

Propagation

  • Globally propagated90% of full-feed peers or more33.3%1
  • Partially propagated40% to 90%33.3%1
  • Seen by few peersUnder 40%33.3%1

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 1 prefixes

  • /4016.8M × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS399855 started or stopped in this period.

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