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Autonomous System

AS131429 · MOBIFONE Corporation

Overview

AS131429 is announced on the Internet: RIPE RIS route collectors currently see 228 IPv4 prefixes and 653 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 53,248 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 17 upstream neighbours (transit providers or peers) and 16 downstream neighbours (customers or networks it carries). Its most visible upstreams are Arelion Sweden AB (AS1299), NTT America, Inc. (AS2914), and FPT Telecom Company (AS18403). AS131429 was assigned by APNIC, and its registration country is Vietnam.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 3:57 AM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 42.1.96.1

The trace goes to 42.1.96.1, the first address of 42.1.96.0/21. 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 (228 prefixes)

PrefixAddresses
42.1.64.0/23512
42.1.64.0/24256
42.1.65.0/24256
42.1.66.0/23512
42.1.68.0/23512
42.1.68.0/24256
42.1.69.0/24256
42.1.70.0/23512
42.1.70.0/24256
42.1.71.0/24256
42.1.72.0/23512
42.1.72.0/24256
42.1.73.0/24256
42.1.74.0/23512
42.1.74.0/24256
42.1.75.0/24256
42.1.76.0/23512
42.1.76.0/24256
42.1.77.0/24256
42.1.78.0/23512
42.1.78.0/24256
42.1.79.0/24256
42.1.80.0/23512
42.1.80.0/24256
42.1.81.0/24256
42.1.82.0/24256
42.1.84.0/221,024
42.1.84.0/23512
42.1.84.0/24256
42.1.85.0/24256
42.1.86.0/23512
42.1.86.0/24256
42.1.87.0/24256
42.1.88.0/221,024
42.1.88.0/23512
42.1.88.0/24256
42.1.89.0/24256
42.1.90.0/23512
42.1.90.0/24256
42.1.91.0/24256
42.1.92.0/24256
42.1.93.0/24256
42.1.94.0/23512
42.1.94.0/24256
42.1.95.0/24256
42.1.96.0/212,048
42.1.96.0/24256
42.1.97.0/24256
42.1.98.0/23512
42.1.98.0/24256
42.1.99.0/24256
42.1.100.0/221,024
42.1.100.0/23512
42.1.100.0/24256
42.1.101.0/24256
42.1.102.0/23512
42.1.102.0/24256
42.1.103.0/24256
42.1.104.0/221,024
42.1.104.0/23512
42.1.104.0/24256
42.1.105.0/24256
42.1.106.0/23512
42.1.106.0/24256
42.1.107.0/24256
42.1.109.0/24256
42.1.110.0/24256
42.1.111.0/24256
42.1.112.0/24256
42.1.113.0/24256
42.1.114.0/24256
42.1.115.0/24256
42.1.116.0/24256
42.1.117.0/24256
42.1.118.0/24256
42.1.119.0/24256
42.1.120.0/24256
42.1.121.0/24256
42.1.122.0/24256
42.1.123.0/24256
42.1.124.0/24256
42.1.125.0/24256
42.1.126.0/23512
42.1.126.0/24256
42.1.127.0/24256
45.117.156.0/221,024
45.121.24.0/221,024
45.121.24.0/24256
59.153.220.0/221,024
59.153.220.0/24256
59.153.221.0/24256
59.153.222.0/24256
59.153.224.0/221,024
59.153.224.0/24256
59.153.225.0/24256
59.153.226.0/24256
59.153.228.0/221,024
59.153.228.0/24256
59.153.229.0/24256
59.153.230.0/24256

Showing the first 100 of 228, in address order. Complete list on RIPEstat

IPv6 prefixes (653 prefixes)

Prefix
2402:9d80:4::/48
2402:9d80:100::/48
2402:9d80:101::/48
2402:9d80:103::/48
2402:9d80:105::/48
2402:9d80:10c::/48
2402:9d80:200::/40
2402:9d80:200::/48
2402:9d80:201::/48
2402:9d80:202::/48
2402:9d80:203::/48
2402:9d80:204::/48
2402:9d80:205::/48
2402:9d80:206::/48
2402:9d80:207::/48
2402:9d80:208::/48
2402:9d80:209::/48
2402:9d80:20a::/48
2402:9d80:20b::/48
2402:9d80:20c::/48
2402:9d80:20d::/48
2402:9d80:210::/48
2402:9d80:211::/48
2402:9d80:212::/48
2402:9d80:214::/48
2402:9d80:215::/48
2402:9d80:216::/48
2402:9d80:217::/48
2402:9d80:218::/48
2402:9d80:219::/48
2402:9d80:21a::/48
2402:9d80:21b::/48
2402:9d80:21c::/48
2402:9d80:21d::/48
2402:9d80:21e::/48
2402:9d80:21f::/48
2402:9d80:220::/48
2402:9d80:221::/48
2402:9d80:223::/48
2402:9d80:224::/48
2402:9d80:225::/48
2402:9d80:226::/48
2402:9d80:227::/48
2402:9d80:228::/48
2402:9d80:229::/48
2402:9d80:22a::/48
2402:9d80:22b::/48
2402:9d80:22c::/48
2402:9d80:22d::/48
2402:9d80:22e::/48
2402:9d80:22f::/48
2402:9d80:230::/48
2402:9d80:231::/48
2402:9d80:232::/48
2402:9d80:233::/48
2402:9d80:234::/48
2402:9d80:235::/48
2402:9d80:236::/48
2402:9d80:237::/48
2402:9d80:238::/48
2402:9d80:239::/48
2402:9d80:23a::/48
2402:9d80:23b::/48
2402:9d80:23c::/48
2402:9d80:23d::/48
2402:9d80:23e::/48
2402:9d80:23f::/48
2402:9d80:240::/48
2402:9d80:241::/48
2402:9d80:242::/48
2402:9d80:243::/48
2402:9d80:244::/48
2402:9d80:245::/48
2402:9d80:246::/48
2402:9d80:247::/48
2402:9d80:248::/48
2402:9d80:249::/48
2402:9d80:24a::/48
2402:9d80:24b::/48
2402:9d80:24c::/48
2402:9d80:24d::/48
2402:9d80:24e::/48
2402:9d80:24f::/48
2402:9d80:250::/48
2402:9d80:251::/48
2402:9d80:252::/48
2402:9d80:253::/48
2402:9d80:254::/48
2402:9d80:255::/48
2402:9d80:256::/48
2402:9d80:257::/48
2402:9d80:258::/48
2402:9d80:259::/48
2402:9d80:25a::/48
2402:9d80:25b::/48
2402:9d80:25c::/48
2402:9d80:25d::/48
2402:9d80:25e::/48
2402:9d80:25f::/48
2402:9d80:260::/48

Showing the first 100 of 653, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (17)

ASNetworkVisibility
AS1299Arelion Sweden AB2,848
AS2914NTT America, Inc.2,240
AS18403FPT Telecom Company1,871
AS3356Level 3 Parent, LLC1,831
AS3491PCCW Global (HK) Ltd.1,440
AS45899VNPT Corp1,201
AS9304HGC Global Communications Limited700
AS10099China Unicom Global340
AS4229Zenlayer Inc291
AS7552Viettel Group275
AS6939Hurricane Electric LLC274
AS9002RETN Limited11
AS24482SG.GS10
AS9583Sify Limited7
AS132132-4
AS9498BHARTI Airtel Ltd.2
AS20326TeraSwitch Networks Inc.1

Downstreams (customers) (16)

ASNetworkVisibility
AS55309Minh Tu Telecom Limited Company2,025
AS13335Cloudflare, Inc.869
AS131440ZINGPLAY VIETNAM COMPANY LIMITED532
AS135972Quang Nam Department of Information and Communications476
AS151911VERICHAINS LIMITED449
AS149111TEDEV TECHNOLOGICAL DEVELOPMENT COMPANY LIMITED444
AS152940TTC TELECOM SERVICE TRADING INVESTMENT COMPANY LIMITED372
AS131386Long Van System Solution JSC263
AS140764CSD Group Technology JSC.262
AS153428TTP GROUP TECHNOLOGY TELECOMMUNICATION JOINT STOCK COMPANY262
AS63736-261
AS135978-257
AS396986-239
AS56141-211
AS135964-187
AS63731-91

8 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.