AS4665

Access unlimited lookups, API and downloads, data enrichment, and Probenet Live.

Summary

IP address summary information
Name	Yonsei University
Country	South Korea
Website	host.io/yonsei.ac.kr·yonsei.ac.kr
Hosted domains	36
IPv4 addresses	78,336
IPv6 addresses	0
ASN type	Education
Registry	APNIC
Allocated	21 years ago on Dec 17, 2004
Updated	9 years ago on Nov 28, 2016

Ranking

#8,687

Overall rank

among 75,059 networks

Traffic

#4,630

Infrastructure

#13,073

#90inSouth Korea

Learn how ASN rankings work

Geolocation

Share of IPv4 footprint per hexagonLessMore

Countries by IPv4 share

South Korea
100%

Held location over 90 days: 91%
Held location over 1 year: 92%
Median days between moves: 506 days
Geolocation scope: City

How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.

Activity

A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.

Mon

IP Ranges

Netblock	Company	Num of IPs
165.132.0.0/16	Yonsei University	65,536
165.132.0.0/17	Yonsei University	32,768
165.132.128.0/17	Yonsei University	32,768
1.233.208.0/20	Yonsei University	4,096
165.132.32.0/21	Yonsei University	2,048
165.132.40.0/21	Yonsei University	2,048
1.233.224.0/22	Yonsei University	1,024
1.233.228.0/22	Yonsei University	1,024
1.233.232.0/22	Yonsei University	1,024
1.233.206.0/23	Yonsei University	512

IP Ranges

WHOIS


  ASHandle:       █████
  OrgID:          █████
  ASName:         ██████
  ASNumber:       AS█████
  RegDate:        ████-██-██
  Updated:        ████-██-██
  TechHandle:     ████-████
  Source:         ████

Hosted Domains

There are 36 domain names hosted across 25 IP addresses on this ASN.

IP Address	Domain	Count
165.132.43.138		4
165.132.43.136		3
165.132.120.94		3
165.132.13.47		3
165.132.16.134		3

Places

IPs in this network linked to physical places, based on their Wi-Fi networks.

Places IPs28
University28

Category	In AS4665	Example IP
University	28	1.233.206.35

New

IPinfo Places identifies hotels, airports, stadiums, and more with building-level precision.

Explore Places

Places

Peers

There are 3 peers for this ASN.

ASN	Name	Rank
AS3786	LG DACOM Corporation
AS4766	Korea Telecom
AS9318	SK Broadband Co Ltd

Upstreams

There are 3 upstreams for this ASN.

ASN	Name	Rank
AS3786	LG DACOM Corporation
AS4766	Korea Telecom
AS9318	SK Broadband Co Ltd

Downstreams

There are 0 downstreams for this ASN.

No downstreams found.

Pingable IPs

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

IP Address	ASN	Details
165.132.5.37 Ping	AS4665Yonsei University	1.92ms from Seoul, KR
1.233.206.34 Ping	AS4665Yonsei University	1.54ms from Incheon, KR
165.132.201.18 Ping	AS4665Yonsei University	3.57ms from Seoul, KR
1.233.219.104 Ping	AS4665Yonsei University	2.65ms from Seoul, KR
165.132.245.193 Ping	AS4665Yonsei University	3.69ms from Seoul, KR
1.233.209.131 Ping	AS4665Yonsei University	3.08ms from Seoul, KR
165.132.237.1 Ping	AS4665Yonsei University	3.65ms from Seoul, KR
165.132.10.58 Ping	AS4665Yonsei University	2.96ms from Seoul, KR
165.132.19.160 Ping	AS4665Yonsei University	1.07ms from Seoul, KR
165.132.200.103 Ping	AS4665Yonsei University	2.63ms from Seoul, KR

Other Pingable IPs

IP Address	ASN	Details

Pingable IPs

Important routers in AS4665


165.132.200.140	Seoul, South Korea
1.233.206.18	Seoul, South Korea
165.132.200.139	Seoul, South Korea
1.233.206.25	Incheon, South Korea
1.233.206.17	Seoul, South Korea
165.132.201.20	Seoul, South Korea
1.233.206.27	Seoul, South Korea
165.132.201.178	Seoul, South Korea
165.132.2.34	Seoul, South Korea
165.132.2.17	Seoul, South Korea

Important routers in AS4665

Traceroute

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

$ traceroute -a -n -q1 -m13 165.132.217.106

traceroute to 165.132.217.106 (165.132.217.106): 13 hops max, 52 byte packets

1 [AS174] 38.142.112.206 3.28 ms

2 [AS174] 154.54.172.113 3.527 ms

3 [AS174] 154.54.40.249 11.374 ms

4 [AS174] 154.54.165.26 22.314 ms

5 [AS174] 154.54.166.58 31.47 ms

6 [AS174] 154.54.44.86 42.265 ms

7 [AS174] 154.54.27.118 41.661 ms

8 [AS174] 38.19.141.50 41.288 ms

9 [AS3786] 1.213.115.145 41.567 ms

10 [AS3786] 1.213.152.45 182.264 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in New Orleans, US

On October 30, 2026

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS4665 at robtex.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get started for free Contact sales

Our IP tools

Explore all tools

What is my IP?

Test our data accuracy by viewing insights from your IP address.

See your IP address

Map IPs

Paste up to 500,000 IPs to see where they're located on a map.

Try Map IPs

Summarize IPs

Use our data visualization tool to create a visual overview of multiple IPs.

Try Summarize IPs

AS4665

Summary

Ranking

Geolocation

Countries by IPv4 share

Activity

IP Ranges

IP Ranges

WHOIS

Hosted Domains

Places

Places

Peers

Upstreams

Downstreams

Pingable IPs

Other Pingable IPs

Pingable IPs

Important routers in AS4665

Important routers in AS4665

Traceroute

Related Networks

AS131845

AS131853

AS135669

AS38105

AS38418

What is an ASN?

An API built with users in mind: reliable, accurate, and easy-to-use

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Traceroute

Ranking

Places

Important routers in AS4665

Geolocation

Countries by IPv4 share

Pingable IPs

Other Pingable IPs

Activity

IP Ranges

AS131845

AS131853

AS135669

AS38105

AS38418

AS38432