subnet.im

AS398991X99

United StatesRegistryARIN

As of 10th November 2026, AS398991 (X99), a network registered in the United States with ARIN, originates 65 IPv4 prefixes covering 21.8k addresses and 6 IPv6 prefixes. By IPv4 address space that makes it the 6,816th-largest of the 80,723 networks we see originating IPv4, and the 2,266th-largest of 18,750 in the United States. It is seen behind 23 upstream networks, most often AS2914 (NTT America, Inc.) and AS60068 (Datacamp Limited (CDN77 / DataPacket)), and in front of 3 downstream networks. 65% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 73% of its routes reach at least 90% of full-feed peers, and 6 prefixes are also originated by another network.

At a glance

IPv4 prefixes

65

IPv6 prefixes

6

IPv4 addresses

21.8k

IPv6 /64s

2.5B

Upstream graph

The networks AS398991 is seen behind, one and two hops out, drawn from real AS paths.

AS398991Toward the internet core
Upstream graph for AS398991: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS398991X99This networkAS174Cogent Communicat…AS2914NTT America, Inc.AS6939Hurricane Electri…AS60068Datacamp Limited …AS272786X99 INTERNETAS151326DCConnect Communi…AS49544i3D.net B.VAS215859Hetzner Cloud - S…AS1299Arelion (fka. Tel…AS20130Depaul UniversityAS132337AxclusiveAS6762Telecom Italia Sp…

Networks observed one and two hops upstream of AS398991 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

102

adjacent networks

Upstreams
2323%
Peers
7675%
Downstreams
33%

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

Upstreams of AS398991
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer1,632103
AS60068Datacamp Limited (CDN77 / DataPacket)GBPeer1,057127
AS272786X99 INTERNETBRPeer93980
AS174Cogent Communications, LLCUSPeer36773
AS6939Hurricane Electric LLCUSPeer28022
AS6762Telecom Italia Sparkle (Seabone)ITPeer24244
AS49544i3D.net B.VNLPeer472
AS25091IP-Max SACHPeer244
AS7195EdgeUnoCOPeer172
AS3303Swisscom (Schweiz) AGCHPeer141

Prefixes

All 71

The largest blocks AS398991 originates, widest first.

Largest prefixes originated by AS398991
PrefixAddressesVisibility
38.46.142.0/2351276/76
38.81.122.0/2351276/76
38.99.238.0/2351276/76
38.100.202.0/2351276/76
38.135.26.0/2351276/76
38.183.188.0/2351276/76
38.247.68.0/2351215/76
38.247.70.0/2351276/76
130.250.188.0/2351276/76
142.99.102.0/2351276/76

Routing health

How AS398991'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

  • Valid64.8%46
  • Invalid0.0%0
  • No ROA35.2%25

Propagation

  • Globally propagated90% of full-feed peers or more73.2%52
  • Partially propagated40% to 90%9.9%7
  • Seen by few peersUnder 40%16.9%12

Prefix sizes

IPv4 — 65 prefixes

IPv6 — 6 prefixes

  • /332.1B × /6416.7%1
  • /3867.1M × /6483.3%5

Recent changes

Announcements that started or stopped since 11th Oct 2026.

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