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Autonomous System

AS209735 · Lagrange Cloud Technologies Limited

Overview

AS209735 is announced on the Internet: RIPE RIS route collectors currently see 2 IPv4 prefixes and 4 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 512 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 7 upstream neighbours (transit providers or peers) and 88 downstream neighbours (customers or networks it carries). Its most visible upstreams are Hurricane Electric LLC (AS6939), Colocation Ltd (AS44355), and Inferno Communications Ltd (AS207841). AS209735 was assigned by RIPE NCC, and its registration country is United Kingdom.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 11:51 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 85.155.100.1, the first address of 85.155.100.0/24. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.

Announced prefixes

IPv4 prefixes (2 prefixes)

PrefixAddresses
85.155.100.0/24256
103.146.103.0/24256

IPv6 prefixes (4 prefixes)

Prefix
2a06:de01:f4::/48
2a07:54c2:b00b::/48
2a0f:85c1:80::/48
2a0f:85c1:81::/48

Neighbours

Upstreams (transit or peers) (7)

ASNetworkVisibility
AS6939Hurricane Electric LLC13,919
AS44355Colocation Ltd1,561
AS207841Inferno Communications Ltd44
AS8218Zayo Infrastructure France SA8
AS3935131173 Services AB6
AS33891Core-Backbone GmbH5
AS4455IX Reach Ltd1

Downstreams (customers) (88)

ASNetworkVisibility
AS208915HyperLink HYPERLXC MEDICAL LTD508
AS61087DGTL TECH UK LLP485
AS47326KTT Carrier Limited327
AS219347Andi Anderson Vulczak283
AS219424jeongmin Geum261
AS60431PNO Solutions Limited260
AS200332Nolan Trapp253
AS201182IT Uoga MB253
AS214690UAB Ginetas253
AS218882Leendert van Hoorn253
AS219214-253
AS205150-245
AS205398-245
AS205710-245
AS199632-243
AS207738-243
AS212811-243
AS214206-243
AS214882-243
AS218631-243
AS219039-243
AS219066-243
AS219351-243
AS197174-242
AS219251-227
AS210066-201
AS218905-192
AS218788-191
AS218771-188
AS197346-186

The 30 most visible of 88.

18 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.

Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.

How to read this page

An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.

A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.

Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.

The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.

Frequently asked questions

How do I find the ASN of an IP address?
Type the address in the BGP viewer: it shows the prefix that covers it, the AS that originates that prefix and the paths seen towards it. A traceroute also names the network of each hop, so you can see every AS a connection crosses.
Why does one company have several ASNs?
Large operators split their network by region, by activity or by history: a cloud may use one number for its backbone and another for a region, and every acquisition brings its own numbers. Each number has its own page, with its own prefixes and neighbours.
Why do prefix counts differ from one site to another?
Each source sees the routing table from different collectors, at a different time, and counts differently: some include prefixes withdrawn in recent weeks, some merge a block and its pieces. This page counts the prefixes RIPE RIS collectors see originated by the network at the end of the latest two-week window, and counts each IPv4 address once.
Is this the list of IP ranges of a cloud provider?
It is what its networks announce, which is what the Internet routes to them. Many providers also publish an official list of ranges per service and region; that list is the reference for firewall rules, because a range can be announced before it is used, or announced by another of their AS numbers.