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 : nic-db@netforest.ad.jp
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:         hostmaster@nic.ad.jp
abuse-mailbox:  hostmaster@nic.ad.jp
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:         hostmaster@nic.ad.jp
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 : nic-db@netforest.ad.jp
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
203.191.48.0/21	AS24175	National Agency for Scientific and Technological Information	2,048
203.191.8.0/21	AS18403	FPT Cau Giay Building, Duy Tan, Cau Giay, Hanoi	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
203.191.44.0/23	AS46024	PT Cyber Network Indonesia	512
203.191.32.0/23	AS17471	Grameen CyberNet	512
203.191.130.0/24	AS45935	WanTok Network Limited	256
203.191.131.0/24	AS45935	WanTok Network Limited	256
203.191.40.0/24	AS38496	PT Jaringan Merah Putih	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
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
203.191.27.0/24	AS64047	Viking Telecom Broadband	256
203.191.3.0/24	AS38166	Standard Chartered Bank IT/Network service Team	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

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
52.234.142.53	AS8075 Microsoft Corporation	`0.40ms` from Ashburn, US
124.206.241.165	AS4808 China Unicom Beijing Province Network	`4.84ms` from Beijing, CN
69.241.136.165	AS7922 Comcast Cable Communications, LLC	`1.58ms` from Boston, US
172.73.163.53	AS11426 Charter Communications Inc	`4.80ms` from Charlotte, US
20.105.44.197	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
212.38.26.245	AS24639 InfraServ GmbH & Co.Hoechst KG	`1.15ms` from Frankfurt am Main, DE
103.9.54.165	AS135513 XYZ Telecom Pty Ltd	`0.30ms` from Melbourne, AU
109.234.137.21	AS34758 Axera SpA	`6.22ms` from Milan, IT
124.45.12.85	AS9595 NTT-ME Corporation	`1.72ms` from Osaka, JP
18.228.97.133	AS16509 Amazon.com, Inc.	`0.17ms` from Osasco, BR
159.8.99.85	AS36351 IBM Cloud	`0.69ms` from Paris, FR
89.233.175.149	AS12767 T-Mobile Czech Republic a.s.	`0.51ms` from Prague, CZ
44.202.161.69	AS14618 Amazon.com, Inc.	`0.43ms` from Reston, US
78.93.75.165	AS25233 ARABIAN INTERNET & COMMUNICATIONS SERVICES CO.LTD	`3.20ms` from Riyadh, SA
73.70.49.229	AS7922 Comcast Cable Communications, LLC	`4.96ms` from San Jose, US
121.145.200.5	AS4766 Korea Telecom	`7.20ms` from Seoul, KR
73.216.95.197	AS7922 Comcast Cable Communications, LLC	`8.79ms` from Washington, US
37.150.233.21	AS9198 JSC Kazakhtelecom	`2.16ms` from Almaty, KZ
91.208.191.21	AS203046 VTG AG	`4.82ms` from Berlin, DE
69.241.253.213	AS7922 Comcast Cable Communications, LLC	`2.52ms` from Boston, US
93.232.201.165	AS3320 Deutsche Telekom AG	`8.33ms` from Frankfurt am Main, DE
113.177.241.85	AS45899 VNPT Corp	`2.01ms` from Hanoi, VN
102.90.10.229	AS29465 MTN NIGERIA Communication limited	`4.83ms` from Lagos, NG
5.68.17.181	AS5607 Sky UK Limited	`4.83ms` from London, GB
82.69.91.69	AS13037 Zen Internet Ltd	`1.60ms` from Manchester, GB

Traceroute

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

traceroute -a -n -q1 -f4 -m7 203.191.136.5

traceroute to 203.191.136.5 (203.191.136.5): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.93 0.07 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Tieling, CN

On February 8th 2026

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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