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Autonomous System

AS42 · WoodyNet, Inc.

Overview

AS42 is announced on the Internet: RIPE RIS route collectors currently see 197 IPv4 prefixes and 206 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 56,320 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 186 upstream neighbours (transit providers or peers) and 9 downstream neighbours (customers or networks it carries). Its most visible upstreams are Hurricane Electric LLC (AS6939), NTT America, Inc. (AS2914), and Arelion Sweden AB (AS1299). AS42 was assigned by ARIN, and its registration country is United States.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 8:51 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 64.78.200.1, the first address of 64.78.200.0/21. 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 (197 prefixes)

PrefixAddresses
45.112.180.0/24256
45.112.182.0/24256
63.246.32.0/24256
63.246.34.0/24256
63.246.35.0/24256
63.246.36.0/24256
63.246.38.0/24256
63.246.39.0/24256
63.246.40.0/24256
63.246.41.0/24256
63.246.42.0/24256
63.246.43.0/24256
63.246.44.0/24256
63.246.47.0/24256
64.78.200.0/212,048
64.78.200.0/24256
64.78.201.0/24256
64.78.202.0/24256
64.78.204.0/24256
64.78.205.0/24256
64.78.206.0/24256
64.78.207.0/24256
66.96.112.0/24256
66.96.113.0/24256
66.96.114.0/24256
66.96.117.0/24256
66.96.118.0/24256
66.96.119.0/24256
66.96.120.0/24256
66.96.121.0/24256
66.96.123.0/24256
66.96.125.0/24256
66.96.126.0/24256
66.102.32.0/24256
66.102.33.0/24256
66.102.34.0/24256
66.102.37.0/24256
66.102.38.0/24256
66.102.39.0/24256
66.102.40.0/24256
66.102.41.0/24256
66.102.43.0/24256
66.102.44.0/24256
66.102.45.0/24256
66.185.112.0/24256
66.185.113.0/24256
66.185.114.0/24256
66.185.115.0/24256
66.185.116.0/24256
66.185.117.0/24256
66.185.118.0/24256
66.185.120.0/24256
66.185.121.0/24256
66.185.122.0/24256
66.185.123.0/24256
66.185.124.0/24256
66.185.125.0/24256
66.185.127.0/24256
67.21.37.0/24256
67.22.112.0/212,048
68.65.112.0/212,048
70.40.0.0/212,048
70.40.0.0/24256
70.40.1.0/24256
70.40.2.0/24256
70.40.3.0/24256
70.40.4.0/24256
70.40.5.0/24256
70.40.6.0/24256
70.40.7.0/24256
70.40.8.0/212,048
70.40.8.0/24256
70.40.9.0/24256
70.40.10.0/24256
70.40.11.0/24256
70.40.12.0/24256
70.40.13.0/24256
70.40.14.0/24256
70.40.15.0/24256
72.0.48.0/24256
72.0.49.0/24256
72.0.50.0/24256
72.0.51.0/24256
72.0.52.0/24256
72.0.53.0/24256
72.0.54.0/24256
72.0.55.0/24256
72.0.56.0/24256
72.0.57.0/24256
72.0.58.0/24256
72.0.59.0/24256
72.0.60.0/24256
72.0.61.0/24256
72.0.62.0/24256
72.0.63.0/24256
74.63.16.0/24256
74.63.17.0/24256
74.63.18.0/24256
74.63.19.0/24256
74.63.20.0/24256

Showing the first 100 of 197, in address order. Complete list on RIPEstat

IPv6 prefixes (206 prefixes)

Prefix
2001:500:14::/48
2001:500:7d::/48
2001:500:83::/48
2001:678:3::/48
2001:678:28::/48
2001:678:4c::/48
2001:678:60::/48
2001:678:94::/48
2001:dd8:1f::/48
2620:171:1::/48
2620:171:2::/48
2620:171:4::/48
2620:171:8::/48
2620:171:9::/48
2620:171:a::/48
2620:171:b::/48
2620:171:c::/48
2620:171:d::/48
2620:171:f::/48
2620:171:10::/48
2620:171:13::/48
2620:171:17::/48
2620:171:18::/48
2620:171:1a::/48
2620:171:1b::/48
2620:171:1c::/48
2620:171:1f::/48
2620:171:23::/48
2620:171:25::/48
2620:171:26::/48
2620:171:28::/48
2620:171:2a::/48
2620:171:2b::/48
2620:171:2c::/48
2620:171:30::/48
2620:171:31::/48
2620:171:32::/48
2620:171:33::/48
2620:171:34::/48
2620:171:35::/48
2620:171:36::/48
2620:171:37::/48
2620:171:38::/48
2620:171:3b::/48
2620:171:3c::/48
2620:171:40::/48
2620:171:41::/48
2620:171:42::/48
2620:171:43::/48
2620:171:44::/48
2620:171:45::/48
2620:171:46::/48
2620:171:47::/48
2620:171:48::/48
2620:171:49::/48
2620:171:4c::/48
2620:171:50::/48
2620:171:53::/48
2620:171:54::/48
2620:171:55::/48
2620:171:56::/48
2620:171:57::/48
2620:171:58::/48
2620:171:59::/48
2620:171:5a::/48
2620:171:5d::/48
2620:171:60::/48
2620:171:62::/48
2620:171:63::/48
2620:171:64::/48
2620:171:65::/48
2620:171:66::/48
2620:171:67::/48
2620:171:68::/48
2620:171:69::/48
2620:171:6c::/48
2620:171:71::/48
2620:171:72::/48
2620:171:75::/48
2620:171:7d::/48
2620:171:8b::/48
2620:171:93::/48
2620:171:9d::/48
2620:171:9f::/48
2620:171:a4::/48
2620:171:a5::/48
2620:171:a7::/48
2620:171:aa::/48
2620:171:ab::/48
2620:171:ac::/48
2620:171:b4::/48
2620:171:b5::/48
2620:171:b6::/48
2620:171:ba::/48
2620:171:bb::/48
2620:171:bc::/48
2620:171:bf::/48
2620:171:c0::/48
2620:171:c3::/48
2620:171:c4::/48

Showing the first 100 of 206, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (186)

ASNetworkVisibility
AS6939Hurricane Electric LLC1,181
AS2914NTT America, Inc.396
AS1299Arelion Sweden AB295
AS3356Level 3 Parent, LLC276
AS37474ISPA SA255
AS55818MC-IX Matrix Internet Exchange RS-1252
AS715WoodyNet, Inc.223
AS9002RETN Limited94
AS3257GTT Communications Inc.84
AS6762TELECOM ITALIA SPARKLE S.p.A.82
AS58115-77
AS6461Zayo Bandwidth58
AS13004Serbian Open Exchange DOO53
AS3491PCCW Global (HK) Ltd.40
AS13030Init7 (Switzerland) Ltd.38
AS25091IP-Max SA36
AS34549meerfarbig GmbH & Co. KG28
AS5405Inter.link GmbH27
AS35280F5 Networks SARL26
AS3303Swisscom (Schweiz) AG22
AS33891Core-Backbone GmbH21
AS3320Deutsche Telekom AG19
AS6830LibertyGlobal Liberty Global Europe Holding B.V.19
AS34177Celeste SAS18
AS213973-18
AS8218Zayo Infrastructure France SA16
AS8455atom86 BV16
AS15802Emirates Integrated Telecommunications Company PJSC15
AS20485Joint Stock Company TransTeleCom15
AS20764CJSC RASCOM14

The 30 most visible of 186.

Downstreams (customers) (9)

ASNetworkVisibility
AS715WoodyNet, Inc.579
AS19281Quad9433
AS187DNScast342
AS10886University of Maryland326
AS52304NIC Chile289
AS52306NIC Chile283
AS398891Quad9249
AS21556National Aeronautics and Space Administration202
AS16668GBP Software, LLC19

185 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.