subnet.im

AS55256Netskope Inc

United StatesRegistryARIN

As of 28th September 2026, AS55256 (Netskope Inc), a network registered in the United States with ARIN, originates 603 IPv4 prefixes covering 191k addresses. By IPv4 address space that makes it the 1,416th-largest of the 79,568 networks we see originating IPv4, and the 404th-largest of 18,431 in the United States. It is seen behind 109 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS174 (Cogent Communications, LLC). 25% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

603

IPv6 prefixes

0

IPv4 addresses

191k

IPv6 /64s

0

Upstream graph

The networks AS55256 is seen behind, one and two hops out, drawn from real AS paths.

AS55256Toward the internet core
Upstream graph for AS55256: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS55256Netskope IncThis networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3491PCCW Global (HK) …AS7195EdgeUnoAS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3130RGnet OUAS49544i3D.net B.VAS24516Virtutel Pty LtdAS32590Valve Corporation

Networks observed one and two hops upstream of AS55256 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

582

adjacent networks

Upstreams
10919%
Peers
47381%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 109.

Upstreams of AS55256
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer11,72682
AS174Cogent Communications, LLCUSPeer7,21481
AS2914NTT America, Inc.USPeer3,76980
AS7195EdgeUnoCOPeer2,67382
AS3491PCCW Global (HK) Ltd.HKPeer2,56077
AS3356Lumen (Level 3)USPeer2,30877
AS9498Bharti Airtel Ltd.INPeer1,85679
AS6939Hurricane Electric LLCUSPeer1,5759
AS4826Vocus Connect International BackboneAUPeer1,56570
AS4755TATA Communications (formerly VSNL)INPeer81682

Prefixes

All 603

The largest blocks AS55256 originates, widest first.

Largest prefixes originated by AS55256
PrefixAddressesVisibility
162.10.128.0/221k81/82
162.10.136.0/221k81/82
162.10.140.0/221k81/82
162.10.148.0/221k82/82
162.10.152.0/221k81/82
162.10.156.0/221k82/82
162.10.164.0/221k81/82
162.10.172.0/221k81/82
162.10.176.0/221k82/82
162.10.180.0/221k81/82

Routing health

How AS55256'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

  • Valid25.0%151
  • Invalid0.0%0
  • No ROA75.0%452

Propagation

  • Globally propagated90% of full-feed peers or more100.0%603
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 603 prefixes

Recent changes

Announcements that started or stopped since 29th Aug 2026.

79 announced and 2 withdrawn in all; the most recent are shown.

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