203.191.136.0/21

AS17931 · Netforest,Inc.

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Summary

Country	Japan
Domain	netforest.ad.jp
ASN	AS17931
Registry	APNIC
ID	FSWNETWORKS

WHOIS Details

inetnum:        203.191.136.0 - 203.191.143.255
netname:        NETFOREST
descr:          Netforest,Inc
descr:          Yokohama Creation Square 16F,
descr:          5-1 Sakae-cho, Kanagawa-ku, Yokohama,
descr:          Kanagawa 221-0052, Japan
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
remarks:        Email address for spam or abuse complaints : [email protected]
country:        JP
mnt-by:         MAINT-JPNIC
mnt-lower:      MAINT-JPNIC
mnt-irt:        IRT-JPNIC-JP
status:         ALLOCATED PORTABLE
last-modified:  2019-08-27T22:51:15Z
source:         APNIC

irt:            IRT-JPNIC-JP
address:        Urbannet-Kanda Bldg 4F, 3-6-2 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047, Japan
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
auth:           # Filtered
mnt-by:         MAINT-JPNIC
last-modified:  2017-10-18T10:21:54Z
source:         APNIC

role:           Japan Network Information Center
address:        Urbannet-Kanda Bldg 4F
address:        3-6-2 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047,Japan
country:        JP
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
e-mail:         [email protected]
admin-c:        JI13-AP
tech-c:         JE53-AP
nic-hdl:        JNIC1-AP
mnt-by:         MAINT-JPNIC
last-modified:  2012-08-28T07:58:02Z
source:         APNIC

inetnum:        203.191.136.0 - 203.191.143.255
netname:        NETFOREST-CIDR-BLK-JP
descr:          Netforest,Inc
remarks:        Email address for spam or abuse complaints : [email protected]
country:        JP
admin-c:        JP00099489
tech-c:         JP00099489
remarks:        This information has been partially mirrored by APNIC from
remarks:        JPNIC. To obtain more specific information, please use the
remarks:        JPNIC WHOIS Gateway at
remarks:        http://www.nic.ad.jp/en/db/whois/en-gateway.html or
remarks:        whois.nic.ad.jp for WHOIS client. (The WHOIS client
remarks:        defaults to Japanese output, use the /e switch for English
remarks:        output)
last-modified:  2019-08-28T21:52:36Z
source:         JPNIC

Nearby Ranges

BGP prefixes that overlap with 203.191.0.0/16

Range	ASN	Company	Num of IPs
203.191.160.0/19	AS9443	VOCUS PTY LTD	8,192
203.191.240.0/20	AS15830	Equinix Japan Enterprise K.K.	4,096
203.191.224.0/20	AS15830	Equinix Japan Enterprise K.K.	4,096
203.191.192.0/20	AS7545	TPG Internet Pty Ltd.	4,096
203.191.208.0/20	AS9622	Kurashiki Cable TV Corporation	4,096
203.191.8.0/21	AS18403	FPT Cau Giay Building, Duy Tan, Cau Giay, Hanoi	2,048
203.191.48.0/21	AS24175	National Agency for Scientific and Technological Information	2,048
203.191.0.0/23	AS23724	CHINANET FUJIAN PROVINCE NETWORK	512
203.191.34.0/23	AS38174	Capgemini Technology Services India Limited	512
203.191.32.0/23	AS17471	Grameen CyberNet	512
203.191.25.0/24	AS58779	Viking Telecom Broadband	256
203.191.24.0/24	AS64047	Viking Telecom Broadband	256
203.191.24.0/24	AS64047	Viking Telecom Broadband	256
203.191.25.0/24	AS64047	Viking Telecom Broadband	256
203.191.25.0/24	AS64047	Viking Telecom Broadband	256
203.191.130.0/24	AS45935	WanTok Network Limited	256
203.191.3.0/24	AS38166	Standard Chartered Bank IT/Network service Team	256
203.191.40.0/24	AS38496	PT Jaringan Merah Putih	256
203.191.41.0/24	AS38496	PT Hyperscale Data Network	256
203.191.4.0/24	AS38658	Liquidnet Asia-Tokyo/Japan Network, Non-Transit Network, Financial Service Provider	256
203.191.46.0/24	AS135457	BADAN SIBER DAN SANDI NEGARA (BSSN)	256
203.191.131.0/24	AS45935	WanTok Network Limited	256
203.191.6.0/24	AS55914	CANON AUSTRALIA PTY. LTD.	256
203.191.24.0/24	AS58779	Viking Telecom Broadband	256
203.191.24.0/24	AS58779	Viking Telecom Broadband	256
203.191.25.0/24	AS58779	Viking Telecom Broadband	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
18.191.194.133	AS16509 Amazon.com, Inc.	`0.66ms` from Columbus, US
93.216.196.21	AS3320 Deutsche Telekom AG	`2.60ms` from Duesseldorf, DE
79.240.110.197	AS3320 Deutsche Telekom AG	`9.40ms` from Frankfurt am Main, DE
120.236.252.133	AS9808 China Mobile Communications Group Co., Ltd.	`5.16ms` from Guangzhou, CN
14.201.130.21	AS7545 TPG Telecom Limited	`1.78ms` from Melbourne, AU
37.208.72.149	AS58002 JSC Svyazinform	`0.43ms` from Moscow, RU
125.21.73.117	AS9498 BHARTI Airtel Ltd.	`1.02ms` from Mumbai, IN
150.138.80.213	AS137690 Zaozhuang,Shandong Province, P.R.China.	`7.47ms` from Qingdao, CN
201.32.76.37	AS7738 V tal	`0.61ms` from Rio de Janeiro, BR
71.40.51.229	AS11427 Charter Communications Inc	`2.16ms` from Schertz, US
1.157.2.181	AS1221 Telstra Limited	`6.88ms` from Sydney, AU
122.210.211.133	AS17506 ARTERIA Networks Corporation	`1.48ms` from Tokyo, JP
126.1.243.101	AS17676 SoftBank Corp.	`14.97ms` from Tokyo, JP
5.74.44.53	AS58224 Iran Telecommunication Company PJS	`18.05ms` from Yerevan, AM
61.163.212.245	AS4837 CHINA UNICOM China169 Backbone	`7.76ms` from Zhengzhou, CN
12.77.172.165	AS7018 AT&T Enterprises, LLC	`5.35ms` from Atlanta, US
219.245.40.197	AS4538 China Education and Research Network Center	`19.78ms` from Beijing, CN
34.35.109.53	AS396982 Google LLC	`0.15ms` from Johannesburg, ZA
95.244.120.37	AS3269 Telecom Italia S.p.A.	`3.73ms` from Milan, IT
196.216.66.53	AS30844 Liquid Telecommunications Ltd	`0.55ms` from Nairobi, KE
178.186.11.101	AS12389 PJSC Rostelecom	`5.26ms` from Novosibirsk, RU
23.41.16.21	AS24319 Akamai Technologies Tokyo ASN	`0.45ms` from Osaka, JP
78.25.100.213	AS31213 PJSC MegaFon	`8.28ms` from Saint Petersburg, RU
152.74.80.85	AS11340 Red Universitaria Nacional	`8.58ms` from Santiago, CL
124.222.12.213	AS45090 Shenzhen Tencent Computer Systems Company Limited	`0.64ms` from Shanghai, CN

Traceroute

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

traceroute -a -n -q1 -m5 203.191.142.230

traceroute to 203.191.142.230 (203.191.142.230): 5 hops max, 52 byte packets

1 [AS15169] 66.249.95.81 9.053 ms

2 [AS15169] 108.170.248.242 9.112 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Osaka, JP

On December 14th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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