203.147.112.0/20

AS7511 · SYNAPSE Co.,Ltd.

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Summary

Country	Japan
Domain	synapse.jp
ASN	AS7511
Registry	APNIC
ID	SYNAPSE

WHOIS Details

inetnum:        203.147.112.0 - 203.147.127.255
netname:        SYNAPSE
descr:          SYNAPSE Co.,Ltd.
descr:          SYNAPSE Bldg.,6-1,Chuo-cho,Kagoshima city, 890-0053,Japan
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
remarks:        Email address for spam or abuse complaints : jpnic-tech@synapse.jp
country:        JP
mnt-by:         MAINT-JPNIC
mnt-lower:      MAINT-JPNIC
mnt-irt:        IRT-JPNIC-JP
status:         ALLOCATED PORTABLE
last-modified:  2017-05-18T06:36:02Z
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:        203.147.112.0 - 203.147.127.255
netname:        SYNAPSE-CIDR-BLK-JP
descr:          SYNAPSE Co.,Ltd.
remarks:        Email address for spam or abuse complaints : jpnic-tech@synapse.jp
country:        JP
admin-c:        JP00146894
tech-c:         JP00146894
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:  2017-05-19T00:15:49Z
source:         JPNIC

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

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
201.176.205.100	AS22927 Telefonica de Argentina	`2.06ms` from Buenos Aires, AR
70.124.61.132	AS11427 Charter Communications Inc	`12.92ms` from Dallas, US
91.52.167.52	AS3320 Deutsche Telekom AG	`9.81ms` from Frankfurt am Main, DE
124.225.66.52	AS4134 CHINANET-BACKBONE	`0.24ms` from Haikou, CN
149.224.242.132	AS15943 wilhelm.tel GmbH	`0.45ms` from Hamburg, DE
130.194.215.228	AS56132 Monash University,	`2.42ms` from Melbourne, AU
112.132.32.196	AS4837 CHINA UNICOM China169 Backbone	`3.50ms` from Nanjing, CN
100.1.78.228	AS701 Verizon Business	`1.53ms` from New York City, US
101.143.65.228	AS17511 OPTAGE Inc.	`2.68ms` from Osaka, JP
88.186.88.100	AS12322 Free SAS	`4.80ms` from Paris, FR
96.245.110.116	AS701 Verizon Business	`2.02ms` from Philadelphia, US
68.231.69.164	AS22773 Cox Communications Inc.	`4.72ms` from Phoenix, US
120.220.248.4	AS9808 China Mobile Communications Group Co., Ltd.	`4.68ms` from Qingdao, CN
58.237.104.148	AS9318 SK Broadband Co Ltd	`4.54ms` from Seoul, KR
112.86.11.228	AS4837 CHINA UNICOM China169 Backbone	`3.95ms` from Shanghai, CN
141.20.35.196	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`0.87ms` from Berlin, DE
38.238.138.228	AS134548 DXTL Tseung Kwan O Service	`0.72ms` from Hong Kong, HK
45.197.125.20	AS63139 BEDGE CO LIMITED	`0.19ms` from Hong Kong, HK
122.164.35.116	AS24560 Bharti Airtel Ltd., Telemedia Services	`2.36ms` from Hyderabad, IN
109.180.16.212	AS2856 British Telecommunications PLC	`3.40ms` from London, GB
37.152.34.164	AS8586 TalkTalk Communications Limited	`1.77ms` from London, GB
137.184.156.180	AS14061 DigitalOcean, LLC	`0.26ms` from New York City, US
159.89.184.180	AS14061 DigitalOcean, LLC	`0.23ms` from New York City, US
71.1.76.4	AS209 CenturyLink Communications, LLC	`3.52ms` from Orlando, US
189.95.185.228	AS22085 Claro S/A	`14.39ms` from Sao Paulo, BR

Traceroute

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

traceroute -a -n -q1 -m7 203.147.118.249

traceroute to 203.147.118.249 (203.147.118.249): 7 hops max, 52 byte packets

1 [AS15169] 142.251.241.127 2.01 ms

2 [AS15169] 216.239.47.30 2.356 ms

3 [] 103.246.232.208 11.809 ms

4 [AS7511] 202.208.178.197 18.291 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Osaka, JP

On August 22nd 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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