211.19.216.0/21

AS4721 · JCOM Co., Ltd.

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Summary

Country	Japan
Domain	jcom.co.jp
ASN	AS4721
Parent Range	211.19.208.0/20
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

Overlapping Ranges

BGP prefixes that contain 211.19.216.0/21

Range	ASN	Company	Num of IPs
211.19.208.0/20	AS4721	JCOM Co., Ltd.	4,096

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
211.19.208.0/20	AS4721	JCOM Co., Ltd.	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

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
176.238.60.133	AS16135 Turkcell A.S.	`17.59ms` from Ankara, TR
168.245.17.117	AS11377 SendGrid, Inc.	`0.38ms` from Ashburn, US
131.118.213.5	AS6059 University System of Maryland	`3.86ms` from Ashburn, US
82.202.12.21	AS6740 CEZNET s.r.o.	`2.34ms` from Bratislava, SK
23.253.103.133	AS33070 Rackspace Hosting	`1.13ms` from Dallas, US
73.243.43.53	AS7922 Comcast Cable Communications, LLC	`2.46ms` from Denver, US
118.141.43.5	AS9304 HGC Global Communications Limited	`1.16ms` from Hong Kong, HK
192.95.84.181	AS212238 Datacamp Limited	`0.08ms` from Johannesburg, ZA
209.121.176.21	AS852 TELUS Communications Inc.	`0.70ms` from Kelowna, CA
185.58.183.181	AS5603 Telekom Slovenije, d.d.	`2.65ms` from Ljubljana, SI
116.93.121.197	AS23930 VITRO INC.	`0.41ms` from Manila, PH
87.10.155.245	AS3269 Telecom Italia S.p.A.	`2.54ms` from Naples, IT
174.57.124.197	AS7922 Comcast Cable Communications, LLC	`6.24ms` from New York City, US
152.179.20.181	AS701 Verizon Business	`0.56ms` from Philadelphia, US
34.198.6.69	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
122.32.60.213	AS17858 LG POWERCOMM	`6.81ms` from Seoul, KR
106.248.137.181	AS3786 LG DACOM Corporation	`1.71ms` from Seoul, KR
211.244.155.37	AS9318 SK Broadband Co Ltd	`4.27ms` from Seoul, KR
27.32.82.101	AS7545 TPG Telecom Limited	`0.24ms` from Sydney, AU
126.67.206.213	AS17676 SoftBank Corp.	`3.28ms` from Tokyo, JP
80.160.117.85	AS3292 TDC Holding A/S	`2.12ms` from Tønder, DK
105.102.2.213	AS36947 Telecom Algeria	`8.83ms` from Valencia, ES
205.168.14.165	AS209 CenturyLink Communications, LLC	`0.58ms` from Atlanta, US
75.36.88.53	AS7018 AT&T Enterprises, LLC	`5.95ms` from Atlanta, US
90.95.30.37	AS8953 Orange Romania S.A.	`1.96ms` from Bucharest, RO

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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