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

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
70.161.197.213	AS22773 Cox Communications Inc.	`9.66ms` from Ashburn, US
208.249.29.245	AS701 Verizon Business	`2.11ms` from Ashburn, US
24.54.175.133	AS18643 SMART CITY NETWORKS, LIMITED PARTNERSHIP	`12.08ms` from Atlanta, US
89.108.144.85	AS31126 SODETEL S.A.L.	`2.68ms` from Beirut, LB
86.34.149.117	AS9050 Orange Romania S.A.	`5.20ms` from Bucharest, RO
117.217.162.5	AS9829 National Internet Backbone	`6.80ms` from Chennai, IN
98.241.61.101	AS7922 Comcast Cable Communications, LLC	`5.20ms` from Chicago, US
69.146.42.149	AS33588 Charter Communications LLC	`10.13ms` from Denver, US
52.31.157.21	AS16509 Amazon.com, Inc.	`0.25ms` from Dublin, IE
3.73.161.69	AS16509 Amazon.com, Inc.	`0.17ms` from Frankfurt am Main, DE
91.249.202.229	AS9145 EWE TEL GmbH	`3.18ms` from Hamburg, DE
61.10.5.245	AS9908 HK Cable TV Ltd	`0.45ms` from Hong Kong, HK
168.209.69.85	AS3741 Dimension Data	`1.63ms` from Johannesburg, ZA
23.27.123.133	AS149440 Evoxt Enterprise	`0.67ms` from Los Angeles, US
59.102.104.21	AS7545 TPG Telecom Limited	`0.86ms` from Melbourne, AU
89.109.239.229	AS25515 PJSC Rostelecom	`1.63ms` from Moscow, RU
43.239.53.101	AS133590 Wow Solutions and Systems Pvt Ltd	`0.63ms` from Mumbai, IN
122.103.103.133	AS2519 ARTERIA Networks Corporation	`8.75ms` from Osaka, JP
176.57.240.53	AS197883 Serinya Telecom SAS	`0.55ms` from Paris, FR
23.36.85.37	AS16625 Akamai Technologies, Inc.	`0.24ms` from Phoenix, US
173.252.248.133	AS20248 Take 2 Hosting, Inc.	`2.82ms` from Salt Lake City, US
187.34.36.229	AS27699 TELEFÔNICA BRASIL S.A	`2.10ms` from Sao Paulo, BR
180.231.114.181	AS17858 LG POWERCOMM	`3.24ms` from Seoul, KR
202.136.220.213	AS17621 China Unicom Shanghai network	`3.96ms` from Shanghai, CN
40.73.173.5	AS58593 Shanghai Blue Cloud Technology Co.,Ltd	`3.43ms` 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 203.191.136.133

traceroute to 203.191.136.133 (203.191.136.133): 5 hops max, 52 byte packets

1 [AS50293] 193.39.195.45 0.891 ms

2 [AS6939] 184.104.204.17 0.556 ms

3 *

4 *

5 *

Measurement taken from

IPinfo ProbeNet in Lisbon, PT

On August 28th 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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