Autonomous System details

AS17421

Mobile Business Group  ·  twnic.net.tw

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AS17421 – Mobile Business Group

Field Value
Country Taiwan
Website twnic.net.tw
Hosted domains 30
IPv4 addresses 1,655,040
IPv6 addresses 40,570,331,909,040,783,556,931,162,734,592
ASN type Business
Registry apnic
Updated 5 months ago on Nov 06, 2025
Netblock Company Num of IPs
42.74.0.0/16 Mobile Business Group 65,536
42.75.0.0/16 Mobile Business Group 65,536
111.80.0.0/16 Chunghwa Telecom Co.,Ltd. 65,536
42.73.0.0/17 Mobile Business Group 32,768
42.73.128.0/17 Mobile Business Group 32,768
42.79.0.0/17 Mobile Business Group 32,768
111.82.0.0/17 Chunghwa Telecom Co.,Ltd. 32,768
111.82.128.0/17 Chunghwa Telecom Co.,Ltd. 32,768
223.143.0.0/17 Chunghwa Telecom Co.,Ltd. 32,768
42.70.0.0/18 Mobile Business Group 16,384
42.70.64.0/18 Mobile Business Group 16,384
42.70.128.0/18 Mobile Business Group 16,384
42.70.192.0/18 Mobile Business Group 16,384
42.71.0.0/18 Mobile Business Group 16,384
42.71.64.0/18 Mobile Business Group 16,384
42.71.128.0/18 Mobile Business Group 16,384
42.71.192.0/18 Mobile Business Group 16,384
42.72.0.0/18 Mobile Business Group 16,384
42.72.64.0/18 Mobile Business Group 16,384
42.72.128.0/18 Mobile Business Group 16,384
42.72.192.0/18 Mobile Business Group 16,384
42.76.0.0/18 Mobile Business Group 16,384
42.76.64.0/18 Mobile Business Group 16,384
42.76.128.0/18 Mobile Business Group 16,384
42.76.192.0/18 Mobile Business Group 16,384
42.77.0.0/18 Mobile Business Group 16,384
42.77.64.0/18 Mobile Business Group 16,384
42.77.128.0/18 Mobile Business Group 16,384
42.77.192.0/18 Mobile Business Group 16,384
42.78.0.0/18 Mobile Business Group 16,384
42.78.64.0/18 Mobile Business Group 16,384
42.78.128.0/18 Mobile Business Group 16,384
42.78.192.0/18 Mobile Business Group 16,384
42.79.0.0/18 Mobile Business Group 16,384
42.79.64.0/18 Mobile Business Group 16,384
111.70.0.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.71.0.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.71.64.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.71.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.81.0.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.81.64.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.81.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.81.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.83.0.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.83.64.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.83.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
111.83.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
114.136.0.0/18 Chunghwa Telecom Co.,Ltd. 16,384
114.136.64.0/18 Chunghwa Telecom Co.,Ltd. 16,384
114.136.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
114.136.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
114.137.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
114.137.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
116.59.64.0/18 Chunghwa Telecom Co.,Ltd. 16,384
116.59.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
116.59.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.136.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.136.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.137.0.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.137.64.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.137.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.137.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.138.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.138.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.139.0.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.139.64.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.139.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.139.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.140.0.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.140.64.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.140.128.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.140.192.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.141.0.0/18 Chunghwa Telecom Co.,Ltd. 16,384
223.141.64.0/18 Chunghwa Telecom Co.,Ltd. 16,384
42.79.128.0/19 Mobile Business Group 8,192
42.79.160.0/19 Mobile Business Group 8,192
42.79.192.0/19 Mobile Business Group 8,192
42.79.224.0/19 Mobile Business Group 8,192
114.137.0.0/19 Chunghwa Telecom Co.,Ltd. 8,192
114.137.32.0/19 Chunghwa Telecom Co.,Ltd. 8,192
114.137.64.0/19 Chunghwa Telecom Co.,Ltd. 8,192
114.137.96.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.136.0.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.136.32.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.136.64.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.136.96.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.138.0.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.138.32.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.138.64.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.138.96.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.141.128.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.141.160.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.141.192.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.141.224.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.143.128.0/19 Chunghwa Telecom Co.,Ltd. 8,192
223.143.160.0/19 Chunghwa Telecom Co.,Ltd. 8,192
116.59.48.0/20 Chunghwa Telecom Co.,Ltd. 4,096
116.59.16.0/21 Chunghwa Telecom Co.,Ltd. 2,048
116.59.24.0/21 Chunghwa Telecom Co.,Ltd. 2,048
221.120.0.0/21 Chunghwa Telecom Co.,Ltd. 2,048
223.143.192.0/21 Chunghwa Telecom Co.,Ltd. 2,048
223.143.200.0/21 Chunghwa Telecom Co.,Ltd. 2,048
223.143.208.0/21 Chunghwa Telecom Co.,Ltd. 2,048
223.143.216.0/21 Chunghwa Telecom Co.,Ltd. 2,048
223.143.224.0/21 Chunghwa Telecom Co.,Ltd. 2,048
223.143.232.0/21 Chunghwa Telecom Co.,Ltd. 2,048
116.59.12.0/22 Chunghwa Telecom Co.,Ltd. 1,024
221.120.8.0/22 Chunghwa Telecom Co.,Ltd. 1,024
221.120.12.0/22 Chunghwa Telecom Co.,Ltd. 1,024
221.120.40.0/22 Chunghwa Telecom Co.,Ltd. 1,024
221.120.76.0/22 Chunghwa Telecom Co.,Ltd. 1,024
111.71.242.0/23 Chunghwa Telecom Co.,Ltd. 512
116.59.10.0/23 Chunghwa Telecom Co.,Ltd. 512
221.120.32.0/23 Chunghwa Telecom Co.,Ltd. 512
221.120.36.0/23 Chunghwa Telecom Co.,Ltd. 512
221.120.42.0/23 Chunghwa Telecom Co.,Ltd. 512
221.120.46.0/23 Chunghwa Telecom Co.,Ltd. 512
221.120.48.0/23 Chunghwa Telecom Co.,Ltd. 512
221.120.58.0/23 Chunghwa Telecom Co.,Ltd. 512
223.143.240.0/23 Chunghwa Telecom Co.,Ltd. 512
223.143.242.0/23 Chunghwa Telecom Co.,Ltd. 512
223.143.244.0/23 Chunghwa Telecom Co.,Ltd. 512
223.143.246.0/23 Chunghwa Telecom Co.,Ltd. 512
111.71.193.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.194.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.195.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.196.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.197.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.208.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.209.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.212.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.213.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.214.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.215.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.216.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.217.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.218.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.220.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.221.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.222.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.223.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.225.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.226.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.227.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.228.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.229.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.230.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.240.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.248.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.252.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.253.0/24 Chunghwa Telecom Co.,Ltd. 256
111.71.254.0/24 Chunghwa Telecom Co.,Ltd. 256
116.59.0.0/24 Chunghwa Telecom Co.,Ltd. 256
116.59.2.0/24 Chunghwa Telecom Co.,Ltd. 256
116.59.8.0/24 Chunghwa Telecom Co.,Ltd. 256
116.59.9.0/24 Chunghwa Telecom Co.,Ltd. 256
211.79.33.0/24 Chunghwa Telecom Co.,Ltd. 256
211.79.34.0/24 Chunghwa Telecom Co.,Ltd. 256
211.79.35.0/24 Chunghwa Telecom Co.,Ltd. 256
211.79.36.0/24 Chunghwa Telecom Co.,Ltd. 256
211.79.38.0/24 Chunghwa Telecom Co.,Ltd. 256
211.79.40.0/24 Chunghwa Telecom Co.,Ltd. 256
211.79.41.0/24 Chunghwa Telecom Co.,Ltd. 256
211.79.42.0/24 Chunghwa Telecom Co.,Ltd. 256
211.79.47.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.19.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.20.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.21.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.23.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.30.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.34.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.38.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.40.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.41.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.44.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.45.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.50.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.51.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.56.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.57.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.72.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.73.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.74.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.75.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.80.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.81.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.82.0/24 Chunghwa Telecom Co.,Ltd. 256
221.120.83.0/24 Chunghwa Telecom Co.,Ltd. 256

Netblock Company
2001:b400::/23 HiNet Taiwan
2001:b400:e000::/36 HiNet Taiwan
2001:b400:e100::/44 HiNet Taiwan
2001:b400:e110::/44 HiNet Taiwan
2001:b400:e120::/44 HiNet Taiwan
2001:b400:e130::/44 HiNet Taiwan
2001:b400:e140::/44 HiNet Taiwan
2001:b400:e150::/44 HiNet Taiwan
2001:b400:e160::/44 HiNet Taiwan
2001:b400:e170::/44 HiNet Taiwan
2001:b400:e3e0::/44 HiNet Taiwan
2001:b400:e3f0::/44 HiNet Taiwan
2001:b400:e500::/44 HiNet Taiwan
2001:b400:e510::/44 HiNet Taiwan
2001:b400:e520::/44 HiNet Taiwan
2001:b400:e530::/44 HiNet Taiwan
2001:b400:e540::/44 HiNet Taiwan
2001:b400:e550::/44 HiNet Taiwan
2001:b400:e560::/44 HiNet Taiwan
2001:b400:e570::/44 HiNet Taiwan
2001:b400:e600::/44 HiNet Taiwan
2001:b400:e610::/44 HiNet Taiwan
2001:b400:e620::/44 HiNet Taiwan
2001:b400:e630::/44 HiNet Taiwan
2001:b400:e640::/44 HiNet Taiwan
2001:b400:e650::/44 HiNet Taiwan
2001:b400:e660::/44 HiNet Taiwan
2001:b400:e670::/44 HiNet Taiwan
2001:b400:d208::/45 HiNet Taiwan
2001:b400:d408::/45 HiNet Taiwan
2001:b400:f208::/45 HiNet Taiwan
2001:b400:f218::/45 HiNet Taiwan
2001:b400:f408::/45 HiNet Taiwan
2001:b400:f418::/45 HiNet Taiwan

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IP Ranges API

WHOIS Details


                                                ASHandle:       AS17421
                                                OrgID:          AS17421
                                                ASName:         AS17421
                                                ASNumber:       AS17421
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

                                            
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Hosted Domains

There are 30 domain names hosted across 27 IP addresses on this ASN.

IP Address Domain Domains on this IP
42.74.109.17 ██████████ 2
221.120.57.28 ██████████ 2
221.120.43.157 ██████████ 2
111.70.11.180 ██████████ 1
111.80.133.85 █████████ 1
221.120.2.250 ██████████ 1
221.120.2.202 ██████████ 1
111.70.8.238 ██████████ 1
223.140.76.154 ██████████ 1
111.70.10.85 ██████████ 1

Discover all domains hosted on a single IP address with IPinfo's powerful Hosted Domains (Reverse IP) solution.
Useful for Cybersecurity

Peers

There is 1 peer for this ASN.

Peers Name
AS3462 Data Communication Business Group
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.

Upstreams

There is 1 peer for this ASN.

upstreams Name
AS3462 Data Communication Business Group
Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.

Downstreams

There are no downstreams for this ASN.

Get this data and more insights on related domains, allocation dates, registry names, IP counts with IPinfo's IP-to-ASN product.

Pingable IPs

1,831 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
2001:b400:e152:adca:443f:13d9:c676:d26e AS17421 Mobile Business Group 20.46ms from Chang-hua, TW
2001:b400:e3fe:4241:846:7fa1:f0a0:95f6 AS17421 Mobile Business Group 11.54ms from Chang-hua, TW
2001:b400:e508:2bde:6975:6127:f741:d86f AS17421 Mobile Business Group 31.32ms from Chang-hua, TW
2001:b400:e25c:dd94:c8fc:49ff:fe9d:bab3 AS17421 Mobile Business Group 18.47ms from Chang-hua, TW
2001:b400:e282:b77f:f4d6:7859:66e2:e83c AS17421 Mobile Business Group 20.03ms from Chang-hua, TW
2001:b400:e4a1:e6aa:6cf3:7cb:4a53:e49 AS17421 Mobile Business Group 16.73ms from Chang-hua, TW
2001:b400:e3ec:2e7d:5c73:8aff:fe6d:fcb9 AS17421 Mobile Business Group 14.41ms from Chang-hua, TW
2001:b400:e165:638d:b1f4:b4bc:c13:9b5 AS17421 Mobile Business Group 18.75ms from Chang-hua, TW
2001:b400:e40d:305f:ae3f:4c2d:375e:2f50 AS17421 Mobile Business Group 22.54ms from Chang-hua, TW
2001:b400:e2dd:a20a:e466:bbff:fe94:138 AS17421 Mobile Business Group 20.82ms from Chang-hua, TW
2001:b400:e254:4c27:844d:4805:c510:4965 AS17421 Mobile Business Group 19.29ms from Chang-hua, TW
2001:b400:e494:1041:79a7:a0bb:c79c:6cbe AS17421 Mobile Business Group 12.82ms from Chang-hua, TW
2001:b400:e3fc:c216:4887:7241:d30b:95eb AS17421 Mobile Business Group 12.00ms from Chang-hua, TW
2001:b400:e14d:771b:a583:c60e:d50:d35a AS17421 Mobile Business Group 96.55ms from Chang-hua, TW
2001:b400:e405:68bf:859:72ff:fee0:a40d AS17421 Mobile Business Group 16.85ms from Chang-hua, TW
2001:b400:e571:68fd:1f9:9353:a4b4:b38c AS17421 Mobile Business Group 13.70ms from Chang-hua, TW
2001:b400:e490:f4a8:f025:5ff:fe60:1c89 AS17421 Mobile Business Group 15.95ms from Chang-hua, TW
2001:b400:e15b:fd95:237:95ed:96ea:2c96 AS17421 Mobile Business Group 13.82ms from Chang-hua, TW
2001:b400:e566:707c:5526:2610:47fc:559 AS17421 Mobile Business Group 20.07ms from Chang-hua, TW
2001:b400:e108:142:242a:3b4a:ed8d:9cc8 AS17421 Mobile Business Group 18.31ms from Chang-hua, TW
2001:b400:e52c:2c32:74d3:eaff:fef4:cda2 AS17421 Mobile Business Group 25.16ms from Chang-hua, TW
2001:b400:e436:ecc4:6c2e:fff:feab:8e12 AS17421 Mobile Business Group 27.53ms from Chang-hua, TW
2001:b400:e679:ae22:3460:1fff:fe5f:feac AS17421 Mobile Business Group 20.93ms from Chang-hua, TW
2001:b400:e48e:c786:b35b:e50:b0d4:bf17 AS17421 Mobile Business Group 24.61ms from Chang-hua, TW
2001:b400:e55c:c939:ff8d:6fc2:866a:1653 AS17421 Mobile Business Group 13.39ms from Chang-hua, TW

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
4.42.101.189 AS3356 Level 3 Parent, LLC 0.37ms from Atlanta, US
36.213.33.29 AS9808 China Mobile Communications Group Co., Ltd. 0.68ms from Beijing, CN
51.132.72.221 AS8075 Microsoft Corporation 0.19ms from Cardiff, GB
84.248.188.221 AS1759 Telia Finland Oyj 3.69ms from Helsinki, FI
3.11.253.109 AS16509 Amazon.com, Inc. 0.19ms from London, GB
90.242.71.93 AS5378 Vodafone Limited 2.69ms from Manchester, GB
187.130.227.237 AS8151 UNINET 9.00ms from Santiago de Queretaro, MX
173.232.174.157 AS62904 Eonix Corporation 0.27ms from Seattle, US
184.69.186.77 AS6327 Shaw Communications 2.16ms from Seattle, US
124.163.1.13 AS4837 CHINA UNICOM China169 Backbone 3.11ms from Taiyuan, CN
5.20.41.125 AS21412 UAB "Cgates" 4.45ms from Vilnius, LT
45.79.216.61 AS63949 Akamai Connected Cloud 0.39ms from Atlanta, US
101.25.157.13 AS4837 CHINA UNICOM China169 Backbone 11.56ms from Beijing, CN
200.151.71.109 AS7738 V tal 0.63ms from Fortaleza, BR
183.24.132.237 AS4134 CHINANET-BACKBONE 2.99ms from Guangzhou, CN
210.123.238.205 AS4766 Korea Telecom 4.94ms from Incheon, KR
194.154.175.173 AS5413 Wavenet Limited 3.42ms from London, GB
212.219.215.205 AS786 Jisc Services Limited 3.63ms from London, GB
80.65.235.141 AS13193 Keyyo SA 3.77ms from Paris, FR
90.34.77.45 AS3215 Orange S.A. 18.01ms from Paris, FR
119.185.174.13 AS4837 CHINA UNICOM China169 Backbone 5.22ms from Qingdao, CN
67.186.250.253 AS7922 Comcast Cable Communications, LLC 5.70ms from Salt Lake City, US
75.198.156.157 AS6167 Verizon Business 15.04ms from San Jose, US
219.98.135.29 AS2527 Sony Network Communications Inc. 1.40ms from Tokyo, JP
46.226.56.13 AS5524 Signet B.V. 0.79ms from Amsterdam, NL

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

$
traceroute -a -n -q1 -m5 223.139.248.165
traceroute to 223.139.248.165 (223.139.248.165): 5 hops max, 52 byte packets
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Abu Dhabi, AE
On

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS17421 at robtex.

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