220.77.21.0/24

AS17611 · Korea Housing Finance Corporation

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Summary

Country	South Korea
Domain	kt.com
ASN	AS17611
Parent Range	220.72.0.0/13
Registry	KRNIC
ID	220.77.21.0-220.77.21.255

WHOIS Details

inetnum:            220.77.21.0 - 220.77.21.255
descr:              Hangukjutaekgeumyunggongsa
network-type:       CUSTOMER
address:            Munhyeon-Dong Nam-Gu Busangwangyeok-Si
zip-code:           608-040
created:            2015-03-17
admin:              GENERATED-KRNIC-IP-MANAGER-KORNETIP
country:            KR
source:             KRNIC

nic-hdl:            GENERATED-KRNIC-IP-MANAGER-KORNETIP
person:             IP Manager
name:               IP Manager
phone:              +82-2-500-6630
e-mail:             [email protected]
source:             KRNIC

Overlapping Ranges

BGP prefixes that contain 220.77.21.0/24

Range	ASN	Company	Num of IPs
220.72.0.0/13	AS4766	Korea Telecom	524,288

Nearby Ranges

BGP prefixes that overlap with 220.77.0.0/16

Range	ASN	Company	Num of IPs
220.72.0.0/13	AS4766	Korea Telecom	524,288
220.77.43.0/24	AS17611	Korea Telecom	256
220.77.176.0/24	AS9631	Yeongsandaehakgyo	256
220.77.177.0/24	AS9631	Yeongsandaehakgyo	256

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
220.77.21.58	bcsc.or.kr	1

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

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

IP Address	ASN	Details
220.77.21.236	AS17611 Korea Housing Finance Corporation	`6.44ms` from Seoul, KR

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
86.97.45.104	AS5384 Emirates Internet	`1.20ms` from Al Fujairah City, AE
130.35.28.184	AS31898 Oracle Corporation	`0.37ms` from Ashburn, US
191.81.244.56	AS22927 Telefonica de Argentina	`17.67ms` from Buenos Aires, AR
83.113.135.136	AS3215 Orange S.A.	`11.04ms` from Frankfurt am Main, DE
83.54.5.40	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.76ms` from Madrid, ES
81.251.215.120	AS3215 Orange S.A.	`5.37ms` from Marseille, FR
207.53.242.120	AS46309 ValorC3 Data Centers	`7.13ms` from Salt Lake City, US
20.24.164.24	AS8075 Microsoft Corporation	`0.54ms` from Singapore, SG
31.162.190.24	AS12389 PJSC Rostelecom	`10.08ms` from Yekaterinburg, RU
77.49.204.72	AS1241 Forthnet	`4.59ms` from Athens, GR
160.179.14.104	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`8.41ms` from Casablanca, MA
84.119.55.184	AS3209 Vodafone GmbH	`6.10ms` from Frankfurt am Main, DE
51.48.60.88	AS16509 Amazon.com, Inc.	`6.05ms` from Madrid, ES
193.206.62.216	AS137 Consortium GARR	`9.14ms` from Milan, IT
71.37.203.56	AS209 CenturyLink Communications, LLC	`3.88ms` from Minneapolis, US
66.45.93.8	AS33154 DQE Communications LLC	`1.49ms` from Pittsburgh, US
18.232.214.168	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
113.147.234.88	AS2516 KDDI CORPORATION	`2.58ms` from Tokyo, JP
111.179.145.152	AS4134 CHINANET-BACKBONE	`4.71ms` from Wuhan, CN
34.9.93.216	AS396982 Google LLC	`0.10ms` from Council Bluffs, US
90.186.0.56	AS3209 Vodafone GmbH	`7.59ms` from Duesseldorf, DE
115.227.244.216	AS4134 CHINANET-BACKBONE	`5.17ms` from Hangzhou, CN
153.207.231.56	AS4713 NTT DOCOMO BUSINESS,Inc.	`11.34ms` from Osaka, JP
192.31.47.72	AS22131 Reach Fiber Network, LLC	`0.23ms` from Portland, US
210.218.222.152	AS2385 KRIBB(Korea Research Institute of Bioscience Biotechnology)	`3.73ms` from Seoul, KR

Traceroute

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

traceroute -a -n -q1 220.77.21.132

traceroute to 220.77.21.132 (220.77.21.132): 64 hops max, 52 byte packets

1 [AS15169] 172.253.64.138 1.204 ms

2 *

3 *

4 *

5 *

6 [AS4766] 14.43.41.58 8.594 ms

7 [AS7018] 172.15.60.65 8.988 ms

8 [AS7018] 172.15.60.34 8.01 ms

9 *

10 [AS17611] 220.77.21.132 11.268 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On December 20th 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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