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Autonomous System

AS15412 · Flag Telecom UK Limited

Overview

AS15412 is announced on the Internet: RIPE RIS route collectors currently see 19 IPv4 prefixes and 1 IPv6 prefix originated by this network. Together, its IPv4 prefixes cover 30,208 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 65 upstream neighbours (transit providers or peers) and 357 downstream neighbours (customers or networks it carries). Its most visible upstreams are Hurricane Electric LLC (AS6939), Emirates Integrated Telecommunications Company PJSC (AS15802), and Arelion Sweden AB (AS1299). AS15412 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 10:57 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 62.216.128.1, the first address of 62.216.128.0/19. 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 (19 prefixes)

PrefixAddresses
43.248.216.0/221,024
45.125.188.0/221,024
62.216.128.0/198,192
80.77.0.0/204,096
80.81.64.0/198,192
85.95.24.0/221,024
103.5.160.0/221,024
103.8.84.0/24256
103.8.85.0/24256
103.8.86.0/24256
103.8.87.0/24256
103.11.237.0/24256
103.15.116.0/221,024
103.103.152.0/221,024
103.144.202.0/23512
103.225.192.0/221,024
203.79.35.0/24256
203.79.37.0/24256
203.79.39.0/24256

IPv6 prefixes (1 prefix)

Prefix
2001:1a00::/32

Neighbours

Upstreams (transit or peers) (65)

ASNetworkVisibility
AS6939Hurricane Electric LLC73,618
AS15802Emirates Integrated Telecommunications Company PJSC10,097
AS1299Arelion Sweden AB9,906
AS9304HGC Global Communications Limited5,747
AS6762TELECOM ITALIA SPARKLE S.p.A.4,294
AS2914NTT America, Inc.3,597
AS174Cogent Communications, LLC3,053
AS18041Taiwan Digital Streaming Co.1,483
AS8218Zayo Infrastructure France SA900
AS60068Datacamp Limited872
AS13030Init7 (Switzerland) Ltd.867
AS14840BR.Digital Telecom804
AS33891Core-Backbone GmbH786
AS41327Fiber Telecom S.p.A.739
AS3320Deutsche Telekom AG668
AS3491PCCW Global (HK) Ltd.582
AS2497Internet Initiative Japan Inc.555
AS37468Angola Cables545
AS6453TATA COMMUNICATIONS (AMERICA) INC539
AS6461Zayo Bandwidth515
AS1257Tele2 Sverige AB509
AS5405Inter.link GmbH502
AS38008Aperture Science Limited366
AS24961WIIT AG352
AS9044-319
AS34019Hivane Association256
AS2518-221
AS8298IPng Networks GmbH214
AS12389PJSC Rostelecom213
AS6830LibertyGlobal Liberty Global Europe Holding B.V.191

The 30 most visible of 65.

Downstreams (customers) (357)

ASNetworkVisibility
AS9304HGC Global Communications Limited37,119
AS45903CMC Telecom Infrastructure Company15,189
AS135607Infinivan Incorporated14,851
AS9848SEJONG NETWORKS6,287
AS18101Reliance Communications Ltd.DAKC MUMBAI6,212
AS7568CS LOXINFO Public Company Limited.5,758
AS174Cogent Communications, LLC5,274
AS17408AboveNet Communications Taiwan5,220
AS29357NATIONAL MOBILE TELECOMMUNICATIONS COMPANY K.S.C.P.4,346
AS8452IDDQD-AS3,393
AS15802Emirates Integrated Telecommunications Company PJSC2,828
AS5416-2,728
AS57187-2,700
AS45629JasTel Network International Gateway2,672
AS33788-1,714
AS260GTT Americas, LLC1,347
AS9924Taiwan Fixed Network, Telco and Network Service Provider.1,278
AS6461Zayo Bandwidth1,224
AS47589-1,206
AS1299Arelion Sweden AB1,191
AS9416-867
AS35019-819
AS3491PCCW Global (HK) Ltd.814
AS3216PJSC "Vimpelcom"615
AS45430SBN-IIG/AWN-IIG transit provider529
AS30873-492
AS17470Hutchison Telecommunications Lanka (Private) Limited481
AS23749-433
AS202414-405
AS11164Internet2398

The 30 most visible of 357.

66 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.