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Autonomous System

AS3257 · GTT Communications Inc.

Overview

AS3257 is announced on the Internet: RIPE RIS route collectors currently see 1,880 IPv4 prefixes and 78 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 8,548,352 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 109 upstream neighbours (transit providers or peers) and 1,839 downstream neighbours (customers or networks it carries). Its most visible upstreams are Arelion Sweden AB (AS1299), GHOSTnet GmbH (AS12586), and Level 3 Parent, LLC (AS3356). AS3257 was assigned by RIPE NCC, and its registration country is United States.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 6:46 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 67.100.0.1

The trace goes to 67.100.0.1, the first address of 67.100.0.0/14. 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 (1,880 prefixes)

PrefixAddresses
2.26.180.0/24256
2.26.184.0/24256
2.26.220.0/23512
2.26.240.0/221,024
2.26.244.0/221,024
2.27.172.0/24256
2.27.196.0/221,024
2.27.218.0/23512
2.27.220.0/23512
2.27.222.0/23512
2.27.232.0/24256
2.27.235.0/24256
2.27.238.0/24256
2.27.247.0/24256
5.83.96.0/212,048
5.178.16.0/212,048
5.180.4.0/221,024
5.252.77.0/24256
5.253.202.0/24256
8.19.112.0/24256
8.19.203.0/24256
8.31.122.0/24256
8.35.16.0/212,048
8.35.24.0/212,048
8.35.30.0/24256
8.37.186.0/24256
13.143.152.0/212,048
13.143.177.0/24256
16.5.72.0/212,048
16.5.118.0/23512
16.5.168.0/23512
16.5.170.0/23512
23.26.5.0/24256
23.26.6.0/24256
23.26.7.0/24256
23.26.8.0/23512
23.26.11.0/24256
23.26.12.0/24256
23.26.13.0/24256
23.26.16.0/221,024
23.26.21.0/24256
23.26.22.0/24256
23.26.198.0/24256
23.27.3.0/24256
23.27.8.0/24256
23.27.30.0/24256
23.27.114.0/24256
23.27.134.0/24256
23.27.216.0/24256
23.27.238.0/24256
23.184.144.0/24256
23.230.1.0/24256
23.230.64.0/24256
23.230.121.0/24256
23.230.186.0/24256
23.230.234.0/24256
23.230.235.0/24256
23.231.111.0/24256
23.231.115.0/24256
23.231.120.0/24256
23.234.128.0/221,024
23.234.132.0/221,024
23.234.136.0/221,024
23.234.140.0/221,024
23.234.156.0/221,024
23.252.77.0/24256
23.252.78.0/24256
31.58.54.0/24256
31.58.131.0/24256
31.58.139.0/24256
31.58.169.0/24256
31.58.221.0/24256
31.58.222.0/24256
31.77.20.0/221,024
31.77.24.0/221,024
31.77.215.0/24256
31.77.224.0/23512
31.77.242.0/23512
31.77.250.0/24256
37.1.152.0/212,048
37.252.30.0/24256
38.244.113.0/24256
38.244.114.0/24256
38.244.115.0/24256
38.244.121.0/24256
38.244.126.0/24256
45.38.206.0/24256
45.38.234.0/24256
45.39.66.0/24256
45.39.77.0/24256
45.39.95.0/24256
45.39.161.0/24256
45.39.174.0/24256
45.41.12.0/221,024
45.41.60.0/221,024
45.41.132.0/221,024
45.41.136.0/221,024
45.41.144.0/221,024
45.41.164.0/221,024
45.41.174.0/23512

Showing the first 100 of 1,880, in address order. Complete list on RIPEstat

IPv6 prefixes (78 prefixes)

Prefix
2001:590::/32
2001:590:3400::/38
2001:668::/29
2001:668::/32
2001:668:1f:fc23::/64
2001:668:1f:fc31::/64
2001:668:1f:fc32::/64
2001:668:1f:fc33::/64
2001:668:1f:fd24::/64
2001:668:1f:ff77::/64
2001:668:1f:ff80::/64
2001:668:126::/48
2001:668:128::/50
2001:668:128:4000::/50
2001:668:128:8000::/50
2001:668:128:c000::/50
2001:668:130::/48
2001:67c:1514::/48
2001:680::/32
2001:680:16::/48
2001:6f8::/32
2001:6f8:200::/39
2001:6f8:206::/48
2001:6f8:1800::/39
2001:6f8:1903::/48
2001:aa0::/32
2001:aa0:7000::/36
2001:1478::/32
2001:1478:201::/48
2001:1478:700::/48
2001:1478:1801::/48
2001:4890::/32
2400:f780::/32
2405:5e00::/32
2600:1407:1c::/48
2602:ffb7:590::/46
2604:cf80::/32
2605:d480::/32
2606:6200::/32
2607:f588::/32
2610:38::/32
2620:131:2024::/48
2620:135:7003::/48
2a00:16c8::/32
2a00:16c8:10b::/48
2a00:16c8:10c::/48
2a00:1750::/32
2a00:43c0::/32
2a00:4b00:171::/48
2a00:7580:16::/48
2a00:8d00::/32
2a00:bb40::/32
2a02:9e8::/32
2a02:d28::/32
2a02:6280::/32
2a04:e00:2::/48
2a04:1120::/30
2a04:6640::/29
2a04:a3c7::/32
2a05:18c0::/29
2a05:a882:de10::/48
2a06:1180:12bb::/48
2a06:2b81::/32
2a0a:2d04:9825::/48
2a0a:6041::/32
2a0c:7881:98dd::/48
2a0c:8640::/30
2a0d:d901::/32
2a0e:15c0:1213::/48
2a0f:7d00:32ba::/48
2a0f:b242::/32
2a0f:b243::/32
2a0f:b247::/32
2a13:fc00::/29
2a14:4340::/29
2a14:4b00::/29
2a14:5200::/29
2a14:d281::/32

Neighbours

Upstreams (transit or peers) (109)

ASNetworkVisibility
AS1299Arelion Sweden AB141,184
AS12586GHOSTnet GmbH99,196
AS3356Level 3 Parent, LLC96,867
AS174Cogent Communications, LLC77,940
AS9002RETN Limited73,416
AS2914NTT America, Inc.67,699
AS6762TELECOM ITALIA SPARKLE S.p.A.65,218
AS3320Deutsche Telekom AG49,323
AS1103SURF B.V.48,678
AS3491PCCW Global (HK) Ltd.46,486
AS51088A2B IP B.V.42,211
AS12956TELEFONICA GLOBAL SOLUTIONS SL37,186
AS6453TATA COMMUNICATIONS (AMERICA) INC36,492
AS12779IT.Gate S.p.A.34,575
AS44901belcloud Belcloud LTD30,914
AS6939Hurricane Electric LLC30,694
AS25091IP-Max SA30,122
AS35625Eurofiber France SAS29,075
AS6830LibertyGlobal Liberty Global Europe Holding B.V.27,335
AS34549meerfarbig GmbH & Co. KG25,451
AS24961WIIT AG23,459
AS6461Zayo Bandwidth23,318
AS2497Internet Initiative Japan Inc.18,807
AS55720Gigabit Hosting Sdn Bhd17,495
AS50629LWLcom GmbH15,679
AS12389PJSC Rostelecom15,593
AS61049Exascale Ltd15,032
AS2516KDDI CORPORATION14,379
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH14,301
AS7474-12,920

The 30 most visible of 109.

Downstreams (customers) (1,839)

ASNetworkVisibility
AS3356Level 3 Parent, LLC113,393
AS174Cogent Communications, LLC53,661
AS1299Arelion Sweden AB41,561
AS6453TATA COMMUNICATIONS (AMERICA) INC35,550
AS34984Superonline Iletisim Hizmetleri A.S.29,346
AS20473The Constant Company, LLC29,255
AS7474SingTel Optus Pty Ltd26,884
AS15830Equinix Equinix (EMEA) Acquisition Enterprises B.V.26,570
AS6762TELECOM ITALIA SPARKLE S.p.A.25,364
AS22773Cox Communications Inc.24,610
AS38195Superloop23,432
AS7195EDGEUNO S.A.S20,728
AS12389PJSC Rostelecom19,738
AS37468Angola Cables19,178
AS55410-18,182
AS3491PCCW Global (HK) Ltd.17,219
AS12956TELEFONICA GLOBAL SOLUTIONS SL17,077
AS13649-16,086
AS9002RETN Limited16,073
AS15924-16,054
AS6461Zayo Bandwidth15,613
AS32098Transtelco Inc15,489
AS7018AT&T Enterprises, LLC15,327
AS9498BHARTI Airtel Ltd.15,131
AS20115Charter Communications LLC14,436
AS40676Psychz Networks14,402
AS13786Seabras 1 USA, LLC13,894
AS4637Telstra Global13,173
AS23487CONECEL12,796
AS49666Telecommunication Infrastructure Company12,240

The 30 most visible of 1,839.

1,720 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.