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Autonomous System

AS16019 · Vodafone Czech Republic a.s.

Overview

AS16019 is announced on the Internet: RIPE RIS route collectors currently see 90 IPv4 prefixes and 17 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 1,210,368 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 18 upstream neighbours (transit providers or peers) and 92 downstream neighbours (customers or networks it carries). Its most visible upstreams are IDDQD-AS (AS1273), Hurricane Electric LLC (AS6939), and Zayo Bandwidth (AS6461). AS16019 was assigned by RIPE NCC, and its registration country is Czechia.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 11:53 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 78.44.0.1

The trace goes to 78.44.0.1, the first address of 78.44.0.0/15. 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 (90 prefixes)

PrefixAddresses
31.30.0.0/1665,536
31.30.0.0/1732,768
31.30.128.0/1732,768
31.169.128.0/1732,768
31.169.128.0/1816,384
31.169.192.0/1816,384
46.135.0.0/1665,536
46.167.192.0/1816,384
46.167.192.0/198,192
46.167.224.0/198,192
46.174.16.0/212,048
46.183.64.0/212,048
62.24.64.0/198,192
62.24.64.0/204,096
62.24.80.0/204,096
62.240.160.0/198,192
62.240.160.0/204,096
62.240.176.0/204,096
62.245.64.0/1816,384
62.245.64.0/198,192
62.245.96.0/198,192
77.48.0.0/1665,536
77.48.0.0/1732,768
77.48.128.0/1732,768
78.44.0.0/15131,072
78.44.0.0/1665,536
78.45.0.0/1665,536
78.102.0.0/1665,536
78.102.0.0/1732,768
78.102.128.0/1732,768
80.95.96.0/198,192
81.27.192.0/204,096
81.27.192.0/212,048
81.27.200.0/212,048
82.142.64.0/1816,384
84.42.128.0/1732,768
84.42.128.0/1816,384
84.42.192.0/1816,384
84.242.64.0/1816,384
84.242.64.0/198,192
84.242.96.0/198,192
86.49.0.0/1665,536
86.49.0.0/1732,768
86.49.128.0/1732,768
88.146.128.0/1732,768
88.146.128.0/1816,384
88.146.192.0/1816,384
89.102.0.0/15131,072
89.102.0.0/1665,536
89.103.0.0/1665,536
89.176.0.0/15131,072
89.176.0.0/1665,536
89.177.0.0/1665,536
91.220.122.0/24256
91.231.28.0/221,024
93.90.160.0/204,096
93.99.0.0/1665,536
93.99.0.0/1732,768
93.99.128.0/1732,768
94.112.0.0/15131,072
94.112.0.0/1665,536
94.113.0.0/1665,536
109.107.192.0/198,192
109.205.240.0/24256
141.170.128.0/1816,384
141.170.128.0/198,192
141.170.160.0/198,192
178.77.192.0/1816,384
178.77.192.0/198,192
178.77.224.0/198,192
178.211.147.0/24256
178.213.152.0/212,048
185.13.87.0/24256
185.31.36.0/221,024
185.99.176.0/221,024
185.168.149.0/24256
185.189.4.0/221,024
185.241.220.0/221,024
185.243.168.0/221,024
188.94.232.0/212,048
188.95.120.0/212,048
193.84.128.0/23512
193.104.172.0/24256
213.192.0.0/1816,384
213.192.0.0/198,192
213.192.32.0/198,192
213.220.192.0/1816,384
213.220.192.0/198,192
213.220.224.0/198,192
217.77.160.0/204,096

IPv6 prefixes (17 prefixes)

Prefix
2001:678:95c::/48
2001:36c0::/32
2a00:11b0::/29
2a00:8e80::/29
2a01:5e0::/32
2a01:5e0::/33
2a01:5e0:8000::/33
2a02:8300::/28
2a02:8300::/29
2a02:8308::/29
2a04:4d40::/29
2a0b:c180::/32
2a0b:d780::/29
2a0c:b180::/29
2a0d:1780::/29
2a10:1d00::/32
2a12:b7c0::/29

Neighbours

Upstreams (transit or peers) (18)

ASNetworkVisibility
AS1273IDDQD-AS15,545
AS6939Hurricane Electric LLC4,351
AS6461Zayo Bandwidth1,026
AS8218Zayo Infrastructure France SA426
AS33891Core-Backbone GmbH421
AS8220COLT Technology Services Group Limited386
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH232
AS21320GEANT Vereniging162
AS4455IX Reach Ltd147
AS47232ISPAlliance ISP Alliance a.s.135
AS6204INTERKVM HOST SRL70
AS6663Euroweb Romania S.R.L.64
AS2852CESNET z.s.p.o.48
AS21215-38
AS47200-9
AS60068Datacamp Limited2
AS5610-1
AS44306-1

Downstreams (customers) (92)

ASNetworkVisibility
AS197451Brno University of Technology1,502
AS204666Jiri Tlapak800
AS52154mjanik.net s.r.o.784
AS2571DHL Information Services (Europe) s.r.o777
AS204383SPCom s.r.o.756
AS35592Coolhousing s.r.o.571
AS34049H-data, spol. s r.o.493
AS207167mapnet IT services s.r.o.477
AS201922mapnet IT services s.r.o.435
AS24641FASTER CZ spol. s r.o.428
AS61110-423
AS57188-384
AS56821-379
AS203072-379
AS216006-374
AS34040-372
AS203328-370
AS211774-369
AS212224-369
AS47269-368
AS49573-368
AS209055-368
AS49890-367
AS197895-367
AS202605-367
AS52115-366
AS58220-366
AS204165-366
AS202237-365
AS47317-361

The 30 most visible of 92.

4 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.