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Autonomous System

AS41327 · Fiber Telecom S.p.A.

Overview

AS41327 is announced on the Internet: RIPE RIS route collectors currently see 22 IPv4 prefixes and 2 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 7,168 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 96 upstream neighbours (transit providers or peers) and 2,299 downstream neighbours (customers or networks it carries). Its most visible upstreams are Zayo Bandwidth (AS6461), Cogent Communications, LLC (AS174), and Hurricane Electric LLC (AS6939). AS41327 was assigned by RIPE NCC, and its registration country is Italy.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 8:58 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 93.94.88.1, the first address of 93.94.88.0/21. 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 (22 prefixes)

PrefixAddresses
5.183.110.0/24256
31.185.96.0/24256
31.185.98.0/24256
31.185.99.0/24256
31.185.100.0/24256
31.185.102.0/23512
45.154.236.0/24256
93.94.88.0/212,048
93.94.91.0/24256
93.94.94.0/23512
93.94.95.0/24256
171.22.208.0/24256
171.22.209.0/24256
171.22.210.0/24256
185.61.168.0/221,024
185.61.168.0/23512
185.61.170.0/24256
185.61.171.0/24256
185.157.228.0/221,024
185.157.228.0/24256
185.157.229.0/24256
185.172.206.0/24256

IPv6 prefixes (2 prefixes)

Prefix
2a03:b020::/29
2a09:3e40::/29

Neighbours

Upstreams (transit or peers) (96)

ASNetworkVisibility
AS6461Zayo Bandwidth31,206
AS174Cogent Communications, LLC22,933
AS6939Hurricane Electric LLC18,773
AS3356Level 3 Parent, LLC18,381
AS1299Arelion Sweden AB6,497
AS3257GTT Communications Inc.6,209
AS6453TATA COMMUNICATIONS (AMERICA) INC3,806
AS6762TELECOM ITALIA SPARKLE S.p.A.3,559
AS2914NTT America, Inc.3,431
AS7195EDGEUNO S.A.S2,341
AS37468Angola Cables2,271
AS3491PCCW Global (HK) Ltd.2,252
AS13786Seabras 1 USA, LLC1,576
AS14840BR.Digital Telecom1,505
AS8220COLT Technology Services Group Limited1,158
AS12389PJSC Rostelecom1,152
AS4230CLARO S.A.973
AS9002RETN Limited907
AS13030Init7 (Switzerland) Ltd.754
AS33891Core-Backbone GmbH723
AS58453China Mobile International Limited662
AS25091IP-Max SA653
AS34927iFog GmbH639
AS37100SEACOM Limited586
AS3223-581
AS7713PT Telekomunikasi Indonesia579
AS1031PEER 1031 LLC547
AS5405Inter.link GmbH529
AS34549meerfarbig GmbH & Co. KG505
AS57463NetIX NetIX Communications JSC505

The 30 most visible of 96.

Downstreams (customers) (2,299)

ASNetworkVisibility
AS174Cogent Communications, LLC17,350
AS3356Level 3 Parent, LLC15,158
AS6461Zayo Bandwidth11,509
AS3257GTT Communications Inc.3,351
AS1299Arelion Sweden AB2,947
AS6453TATA COMMUNICATIONS (AMERICA) INC2,350
AS6762TELECOM ITALIA SPARKLE S.p.A.1,807
AS7195EDGEUNO S.A.S1,801
AS37468Angola Cables1,303
AS2914NTT America, Inc.1,296
AS3491PCCW Global (HK) Ltd.1,229
AS1273IDDQD-AS1,064
AS8220COLT Technology Services Group Limited961
AS13786Seabras 1 USA, LLC955
AS201722-822
AS6830LibertyGlobal Liberty Global Europe Holding B.V.774
AS200553-752
AS201602-737
AS204471-692
AS206658-677
AS64049Reliance Jio Infocomm Pte Ltd Singapore675
AS4230CLARO S.A.647
AS213063-542
AS200311-539
AS198434-531
AS51580-505
AS199324-502
AS22356Durand do Brasil Ltda490
AS59766-479
AS20485Joint Stock Company TransTeleCom475

The 30 most visible of 2,299.

2,957 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.