211.19.208.0/20

AS4721 · JCOM Co., Ltd.

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Summary

Country	Japan
Domain	jcom.co.jp
ASN	AS4721
Registry	JPNIC
ID	JCN-CIDR-BLK-JP

WHOIS Details

inetnum:        211.19.208.0 - 211.19.223.255
netname:        JCN-CIDR-BLK-JP
descr:          JCOM Co., Ltd.
remarks:        Email address for spam or abuse complaints : abuse@home.ne.jp
country:        JP
admin-c:        JP00006551
tech-c:         JP00006551
last-modified:  2021-09-27T23:54:18Z
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)
source:         JPNIC

Nearby Ranges

BGP prefixes that overlap with 211.19.0.0/16

Range	ASN	Company	Num of IPs
211.19.64.0/18	AS9595	NTT-ME Corporation	16,384
211.19.224.0/19	AS23780	CTB Media Inc.	8,192
211.19.16.0/20	AS23641	NS Computer Service Corporation	4,096
211.19.48.0/20	AS17931	Netforest,Inc	4,096
211.19.196.0/22	AS23778	IMIZU CABLE NETWORK CO.,LTD.	1,024
211.19.192.0/22	AS7672	Hokuden Information System Service Co.,Ltd.	1,024
211.19.39.0/24	AS10006	MKI Network Solutions, Ltd.	256

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

Read more

Pingable IPs

25 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
211.19.209.137	AS4721 JCOM Co., Ltd.	`11.68ms` from Tokyo, JP
211.19.211.49	AS4721 JCOM Co., Ltd.	`8.47ms` from Tokyo, JP
211.19.210.3	AS4721 JCOM Co., Ltd.	`10.91ms` from Tokyo, JP
211.19.208.1	AS4721 JCOM Co., Ltd.	`2.32ms` from Tokyo, JP

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
92.65.67.164	AS1136 KPN B.V.	`0.45ms` from Amsterdam, NL
54.244.236.164	AS16509 Amazon.com, Inc.	`0.19ms` from Boardman, US
44.254.185.20	AS16509 Amazon.com, Inc.	`0.15ms` from Boardman, US
72.92.242.212	AS701 Verizon Business	`3.28ms` from Boston, US
96.253.30.4	AS701 Verizon Business	`2.76ms` from Boston, US
129.21.210.148	AS4385 Rochester Institute of Technology	`3.74ms` from Buffalo, US
177.124.28.164	AS52615 WEBCIA INTERNET LTDA	`6.40ms` from Curitiba, BR
216.202.172.68	AS3356 Level 3 Parent, LLC	`11.88ms` from Denver, US
20.218.116.164	AS8075 Microsoft Corporation	`0.25ms` from Frankfurt am Main, DE
12.215.172.164	AS7018 AT&T Enterprises, LLC	`1.65ms` from Houston, US
75.83.235.180	AS20001 Charter Communications Inc	`8.04ms` from Los Angeles, US
209.58.46.20	AS6453 TATA COMMUNICATIONS (AMERICA) INC	`0.27ms` from Los Angeles, US
69.109.155.20	AS7018 AT&T Enterprises, LLC	`4.08ms` from Los Angeles, US
197.249.82.20	AS25139 TVCABO - Comunicacoes Multimedia, Lda	`15.65ms` from Maputo, MZ
203.189.233.228	AS213220 Delta Ltd	`0.66ms` from Moscow, RU
167.206.60.180	AS6128 Cablevision Systems Corp.	`1.61ms` from New York City, US
176.186.5.36	AS5410 Bouygues Telecom SA	`1.84ms` from Paris, FR
124.194.204.36	AS3786 LG DACOM Corporation	`1.88ms` from Seoul, KR
59.171.33.180	AS9824 JCOM Co., Ltd.	`11.19ms` from Tokyo, JP
149.210.208.36	AS20857 Signet B.V.	`0.62ms` from Amsterdam, NL
44.234.109.196	AS16509 Amazon.com, Inc.	`0.61ms` from Boardman, US
176.61.91.20	AS6830 Liberty Global Europe Holding B.V.	`9.35ms` from Dublin, IE
134.99.101.164	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`6.28ms` from Frankfurt am Main, DE
125.88.163.132	AS4134 CHINANET-BACKBONE	`3.53ms` from Guangzhou, CN
72.199.233.164	AS22773 Cox Communications Inc.	`6.92ms` from Los Angeles, US

Traceroute

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

traceroute -a -n -q1 -f3 -m7 211.19.217.56

traceroute to 211.19.217.56 (211.19.217.56): 7 hops max, 52 byte packets

3 [AS55017] 104.219.220.29 0.254 ms

4 [AS55017] 104.219.220.11 0.237 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Saskatoon, CA

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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