Autonomous System details

AS17421

Mobile Business Group · twnic.net.tw

Taiwan

BitTorrent

Mobile

Stub AS

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AS17421 – Mobile Business Group

Field	Value
Country	Taiwan
Website	twnic.net.tw
Hosted domains	30
IPv4 addresses	1,655,296
IPv6 addresses	40,570,331,909,040,783,709,042,400,000,000
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
211.79.37.0/24	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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WHOIS Details

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                                                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.

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IP Address	Domain	Domains on this IP
221.120.77.169	██████████	3
221.120.4.184	███████	3
42.74.109.17	██████████	2
221.120.57.28	██████████	2
221.120.43.157	██████████	2
111.70.5.105	██████████	1
223.137.141.197	██████████	1
111.82.102.141	██████████	1
111.80.133.85	█████████	1
111.70.11.180	██████████	1

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Peers

There is 1 peer for this ASN.

Peers	Name
AS3462	Data Communication Business Group

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ASN API & Database

Upstreams

There is 1 peer for this ASN.

upstreams	Name
AS3462	Data Communication Business Group

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ASN API & Database

Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

1,854 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
2001:b400:e331:15c7:b558:f81:24e4:74a6	AS17421 Mobile Business Group	`17.13ms` from Chang-hua, TW
2001:b400:e3d0:b783:c4c2:f435:ace8:63b	AS17421 Mobile Business Group	`10.97ms` from Chang-hua, TW
2001:b400:e408:b741:df65:7b0b:5f82:8790	AS17421 Mobile Business Group	`15.95ms` from Chang-hua, TW
2001:b400:e25b:f378:1fda:780:dbea:8083	AS17421 Mobile Business Group	`18.18ms` from Chang-hua, TW
2001:b400:e437:f842:1b2b:9465:b9f4:6187	AS17421 Mobile Business Group	`16.77ms` from Chang-hua, TW
2001:b400:e606:54bc:5049:5e0d:70cc:7395	AS17421 Mobile Business Group	`19.70ms` from Chang-hua, TW
2001:b400:e306:5aab:a89d:e4ed:aa21:8961	AS17421 Mobile Business Group	`19.88ms` from Chang-hua, TW
2001:b400:e7d9:1117:cbf1:80a7:4d70:5a9f	AS17421 Mobile Business Group	`21.09ms` from Chang-hua, TW
2001:b400:e486:f2e9:674d:f9a8:b5a8:764a	AS17421 Mobile Business Group	`16.91ms` from Chang-hua, TW
2001:b400:e64c:12a9:a46e:9cf0:4daa:4194	AS17421 Mobile Business Group	`21.32ms` from Chang-hua, TW
2001:b400:e11e:e4d6:d63f:7e36:ff42:4949	AS17421 Mobile Business Group	`13.66ms` from Chang-hua, TW
2001:b400:e16e:8021:b771:ec:bebe:728f	AS17421 Mobile Business Group	`33.55ms` from Chang-hua, TW
2001:b400:e2d5:cd32:4c61:210b:4713:8d5b	AS17421 Mobile Business Group	`16.85ms` from Chang-hua, TW
2001:b400:e730:2d49:7ce9:99eb:65b6:f08a	AS17421 Mobile Business Group	`22.11ms` from Chang-hua, TW
2001:b400:e4da:37b6:fb0f:e365:11a6:2d89	AS17421 Mobile Business Group	`26.58ms` from Chang-hua, TW
2001:b400:e3dc:2bbd:3128:e878:3d32:9c4b	AS17421 Mobile Business Group	`10.86ms` from Chang-hua, TW
2001:b400:e381:ed4b:e086:ac7:ee10:ce53	AS17421 Mobile Business Group	`16.38ms` from Chang-hua, TW
2001:b400:e2a9:f522:e4cb:9b8f:b183:734b	AS17421 Mobile Business Group	`15.63ms` from Chang-hua, TW
2001:b400:e672:2169:8668:21f9:1588:1983	AS17421 Mobile Business Group	`24.24ms` from Chang-hua, TW
2001:b400:e44d:da4f:df0a:baf1:73d:1441	AS17421 Mobile Business Group	`12.21ms` from Chang-hua, TW
2001:b400:e15d:4917:cee:19ff:fea7:fefb	AS17421 Mobile Business Group	`15.37ms` from Chang-hua, TW
2001:b400:e57c:444a:40a8:4860:98:9c0a	AS17421 Mobile Business Group	`17.57ms` from Chang-hua, TW
2001:b400:e518:4047:8496:b951:270b:f0dc	AS17421 Mobile Business Group	`13.25ms` from Chang-hua, TW
2001:b400:e75b:4e04:75cf:47b5:b41b:9136	AS17421 Mobile Business Group	`17.36ms` from Chang-hua, TW
2001:b400:e65d:d980:f5fe:a4a5:7709:f105	AS17421 Mobile Business Group	`26.23ms` 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
162.39.244.61	AS7029 Windstream Communications LLC	`3.61ms` from Atlanta, US
120.246.76.189	AS56048 China Mobile Communicaitons Corporation	`3.30ms` from Beijing, CN
4.152.66.189	AS8075 Microsoft Corporation	`0.18ms` from Boydton, US
23.118.227.93	AS7018 AT&T Enterprises, LLC	`2.80ms` from Houston, US
4.221.137.29	AS8075 Microsoft Corporation	`0.15ms` from Johannesburg, ZA
180.44.58.109	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.88ms` from Osaka, JP
88.177.88.13	AS12322 Free SAS	`3.74ms` from Paris, FR
70.231.91.189	AS7018 AT&T Enterprises, LLC	`4.24ms` from Redding, US
220.76.152.253	AS4766 Korea Telecom	`2.68ms` from Seoul, KR
95.51.115.125	AS5617 Orange Polska Spolka Akcyjna	`1.22ms` from Warsaw, PL
213.242.237.29	AS3253 PJSC Vimpelcom	`0.69ms` from Yekaterinburg, RU
8.227.11.205	AS3356 Level 3 Parent, LLC	`0.37ms` from Atlanta, US
138.26.29.253	AS3452 University of Alabama at Birmingham	`3.43ms` from Atlanta, US
88.199.41.253	AS20960 TK Telekom sp. z o.o.	`5.05ms` from Berlin, DE
94.21.167.109	AS20845 DIGI Tavkozlesi es Szolgaltato Kft.	`2.20ms` from Budapest, HU
5.38.160.13	AS5483 Magyar Telekom Plc.	`1.35ms` from Budapest, HU
193.192.241.125	AS6730 Sunrise GmbH	`5.77ms` from Geneve, CH
95.120.224.237	AS3352 TELEFONICA DE ESPANA S.A.U.	`9.56ms` from Madrid, ES
189.159.130.93	AS8151 UNINET	`1.47ms` from Monterrey, MX
70.49.121.61	AS577 Bell Canada	`5.22ms` from Montreal, CA
62.97.207.45	AS8542 Eviny Fiber AS	`1.05ms` from Oslo, NO
23.217.39.157	AS16625 Akamai Technologies, Inc.	`0.08ms` from Porto Alegre, BR
188.95.58.45	AS57077 AB-NET s.r.o.	`6.20ms` from Prague, CZ
31.184.254.77	AS49505 JSC Selectel	`1.03ms` from Saint Petersburg, RU
101.231.77.77	AS4812 China Telecom (Group)	`2.58ms` from Shanghai, CN

Traceroute

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

traceroute -a -n -q1 -m5 42.72.127.151

traceroute to 42.72.127.151 (42.72.127.151): 5 hops max, 52 byte packets

1 [AS31898] 140.91.242.14 0.072 ms

2 [AS15802] 91.74.125.170 0.341 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Abu Dhabi, AE

On April 13th 2026

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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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