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Autonomous System

AS39505 ยท VESTITEL BG

Overview

AS39505 is announced on the Internet: RIPE RIS route collectors currently see 14 IPv4 prefixes and 1 IPv6 prefix originated by this network. Together, its IPv4 prefixes cover 3,584 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 46 upstream neighbours (transit providers or peers) and 6 downstream neighbours (customers or networks it carries). Its most visible upstreams are Inter.link GmbH (AS5405), RETN Limited (AS9002), and Arelion Sweden AB (AS1299). AS39505 was assigned by RIPE NCC, and its registration country is Bulgaria.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 12:59 AM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 78.40.136.1, the first address of 78.40.136.0/24. 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 (14 prefixes)

PrefixAddresses
78.40.136.0/24256
78.40.137.0/24256
78.40.138.0/24256
87.247.248.0/24256
87.247.249.0/24256
87.247.250.0/24256
87.247.252.0/24256
87.247.255.0/24256
93.93.8.0/24256
93.93.9.0/24256
93.93.12.0/24256
93.93.13.0/24256
178.249.170.0/24256
185.75.48.0/24256

IPv6 prefixes (1 prefix)

Prefix
2a00:6580::/32

Neighbours

Upstreams (transit or peers) (46)

ASNetworkVisibility
AS5405Inter.link GmbH430
AS9002RETN Limited253
AS1299Arelion Sweden AB188
AS3356Level 3 Parent, LLC155
AS2914NTT America, Inc.103
AS6939Hurricane Electric LLC72
AS25091IP-Max SA20
AS34549meerfarbig GmbH & Co. KG18
AS50304Blix Solutions AS17
AS33891Core-Backbone GmbH13
AS3935131173 Services AB13
AS34177Celeste SAS12
AS37497Network Platforms (PTY) LTD11
AS14840BR.Digital Telecom10
AS24961WIIT AG10
AS37468Angola Cables10
AS47692Nessus GmbH8
AS49434FBW NETWORKS SAS8
AS34927iFog GmbH7
AS56655Gigahost AS7
AS3741Dimension Data6
AS6797-6
AS9198JSC Kazakhtelecom6
AS15802Emirates Integrated Telecommunications Company PJSC6
AS29075IELO-LIAZO SERVICES SAS6
AS37100SEACOM Limited6
AS55850Mercury NZ Limited6
AS37282Main one Cable Company Nigeria Limited5
AS41327Fiber Telecom S.p.A.5
AS4657StarHub Ltd4

The 30 most visible of 46.

Downstreams (customers) (6)

ASNetworkVisibility
AS196945Microbase PC353
AS214903The3 The Three Ltd.301
AS198259ECOM SERVICE AD194
AS35489GlobalOne Global One Ltd.193
AS40968Professional Protection Electronic Ltd.150
AS42351StreamNet EOOD85

67 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.