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AS53813ZSCALER, INC.

United StatesRegistryARIN

As of 10th November 2026, AS53813 (ZSCALER, INC.), a network registered in the United States with ARIN, originates 377 IPv4 prefixes covering 145k addresses and 33 IPv6 prefixes. By IPv4 address space that makes it the 1,743rd-largest of the 80,733 networks we see originating IPv4, and the 509th-largest of 18,751 in the United States. It is seen behind 42 upstream networks, most often AS9498 (Bharti Airtel Ltd.) and AS2914 (NTT America, Inc.). 97% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

377

IPv6 prefixes

33

IPv4 addresses

145k

IPv6 /64s

403M

Upstream graph

The networks AS53813 is seen behind, one and two hops out, drawn from real AS paths.

AS53813Toward the internet core
Upstream graph for AS53813: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS53813ZSCALER, INC.This networkAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS4637Telstra Internati…AS4826Vocus Connect Int…AS9498Bharti Airtel Ltd.AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS32590Valve CorporationAS3491PCCW Global (HK) …AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS53813 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

151

adjacent networks

Upstreams
4228%
Peers
10972%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 42.

Upstreams of AS53813
NetworkCountryRelationshipPathsVantage pts
AS9498Bharti Airtel Ltd.INPeer7,244137
AS2914NTT America, Inc.USPeer4,75674
AS4637Telstra International LimitedHKPeer4,564126
AS4826Vocus Connect International BackboneAUPeer3,183125
AS1299Arelion (fka. Telia Carrier)SEPeer1,71235
AS55836Reliance Jio Infocomm LimitedINPeer1,52675
AS3356Lumen (Level 3)USPeer1,14325
AS55410Vodafone Idea LtdINPeer74230
AS6939Hurricane Electric LLCUSPeer718138
AS9583Sify LimitedINPeer63649

Prefixes

All 410

The largest blocks AS53813 originates, widest first.

Largest prefixes originated by AS53813
PrefixAddressesVisibility
101.2.202.0/2351276/76
101.2.204.0/2351276/76
101.2.216.0/2351276/76
101.2.218.0/2351276/76
101.2.220.0/2351276/76
101.2.222.0/2351276/76
101.2.224.0/2351276/76
101.2.226.0/2351276/76
101.2.228.0/2351276/76
101.2.230.0/2351276/76

Routing health

How AS53813'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

  • Valid97.1%398
  • Invalid0.0%0
  • No ROA2.9%12

Propagation

  • Globally propagated90% of full-feed peers or more99.3%407
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.7%3

Prefix sizes

IPv4 — 377 prefixes

IPv6 — 33 prefixes

  • /4016.8M × /6472.7%24
  • /4865.5k × /6427.3%9

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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