1. All IP Ranges
  2. 121.0.0.0/8
  3. 121.255.0.0/16
  4. AS9808  | 121.255.0.0/16

121.255.0.0/16

AS9808  ·  China Mobile Communications Group Co., Ltd.

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Summary

Country China
Domain ustc.edu.cn
ASN AS9808
Registry APNIC
ID SG-USTC

WHOIS Details

inetnum:        121.255.0.0 - 121.255.255.255
netname:        SG-USTC
descr:          University of Science and Technology of China
descr:          Jinzhai Road # 96, Hefei, Anhui, China
country:        CN
admin-c:        XY1746-AP
tech-c:         ZH1700-AP
abuse-c:        AC1601-AP
status:         ALLOCATED PORTABLE
mnt-by:         MAINT-CNNIC-AP
mnt-lower:      MAINT-CNNIC-AP
mnt-routes:     MAINT-CNNIC-AP
mnt-irt:        IRT-SG-USTC-CN
last-modified:  2021-10-26T07:48:06Z
source:         APNIC

irt:            IRT-SG-USTC-CN
address:        JinZhao Road 96
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        XY1746-AP
tech-c:         XY1746-AP
auth:           # Filtered
mnt-by:         MAINT-CNNIC-AP
last-modified:  2025-11-18T00:35:08Z
source:         APNIC

role:           ABUSE CNNICCN
country:        ZZ
address:        Beijing, China
phone:          +000000000
e-mail:         [email protected]
admin-c:        IP50-AP
tech-c:         IP50-AP
nic-hdl:        AC1601-AP
remarks:        Generated from irt object IRT-CNNIC-CN
remarks:        [email protected] is invalid
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-19T17:20:32Z
source:         APNIC

person:         Xia Yuliang
nic-hdl:        XY1746-AP
e-mail:         [email protected]
address:        Network Information Center, USTC, Jinzhai Road #96, Hefei, Anhui, China
phone:          +86-551-3603900
fax-no:         +86-551-3603143
country:        CN
mnt-by:         MAINT-NEW
last-modified:  2010-09-07T10:50:01Z
source:         APNIC

person:         Zhang Huanjie
nic-hdl:        ZH1700-AP
e-mail:         [email protected]
address:        Network Information Center, USTC, Jinzhai Road #96, Hefei, Anhui, China
phone:          +86-551-3601897
fax-no:         +86-551-3603143
country:        CN
mnt-by:         MAINT-NEW
last-modified:  2010-09-07T10:50:01Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 121.0.0.0/8

Range ASN Company Num of IPs
121.128.0.0/11 AS4766 Korea Telecom 2,097,152
121.128.0.0/11 AS9856 Korea Telecom 2,097,152
121.128.0.0/11 AS17588 Korea Telecom 2,097,152
121.128.0.0/11 AS38122 Korea Telecom 2,097,152
121.160.0.0/11 AS38089 Korea Telecom 2,097,152
121.160.0.0/11 AS23582 Korea Telecom 2,097,152
121.160.0.0/11 AS4766 Korea Telecom 2,097,152
121.128.0.0/11 AS18333 Korea Telecom 2,097,152
121.128.0.0/11 AS9647 Korea Telecom 2,097,152
121.224.0.0/12 AS140292 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS137699 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS137697 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS140293 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS4134 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS146966 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS134756 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS137702 CHINANET jiangsu province network 1,048,576
121.208.0.0/12 AS1221 Telstra Limited 1,048,576
121.224.0.0/12 AS134770 CHINANET jiangsu province network 1,048,576
121.8.0.0/13 AS135089 CHINANET Guangdong province network 524,288
121.8.0.0/13 AS136199 CHINANET Guangdong province network 524,288
121.8.0.0/13 AS140308 CHINANET Guangdong province network 524,288
121.112.0.0/13 AS4713 NTT DOCOMO BUSINESS,Inc. 524,288
121.8.0.0/13 AS4134 CHINANET Guangdong province network 524,288
121.16.0.0/13 AS4837 China Unicom Hebei province network 524,288
121.24.0.0/14 AS4837 China Unicom Hebei province network 262,144
121.64.0.0/14 AS17586 LG DACOM Corporation 262,144
121.64.0.0/14 AS23555 LG DACOM Corporation 262,144
121.84.0.0/14 AS17511 OPTAGE Inc. 262,144
121.64.0.0/14 AS17598 LG DACOM Corporation 262,144
121.204.0.0/14 AS133774 CHINANET Fujian province network 262,144
121.204.0.0/14 AS4134 CHINANET Fujian province network 262,144
121.204.0.0/14 AS133776 CHINANET Fujian province network 262,144
121.204.0.0/14 AS133775 CHINANET Fujian province network 262,144
121.32.0.0/14 AS4134 CHINANET Guangdong province network 262,144
121.196.0.0/14 AS37963 Aliyun Computing Co., LTD 262,144
121.60.0.0/14 AS4134 CHINANET Hubei province network 262,144
121.60.0.0/14 AS148981 CHINANET Hubei province network 262,144
121.80.0.0/14 AS17511 OPTAGE Inc. 262,144
121.64.0.0/14 AS3786 LG DACOM Corporation 262,144
121.40.0.0/14 AS37963 Aliyun Computing Co., LTD 262,144
121.60.0.0/14 AS137266 CHINANET Hubei province network 262,144
121.248.0.0/14 AS4538 China Education and Research Network 262,144
121.194.0.0/15 AS4538 China Education and Research Network 131,072
121.56.0.0/15 AS4134 CHINANET neimeng province network 131,072
121.124.0.0/15 AS9318 SK Broadband Co Ltd 131,072
121.4.0.0/15 AS45090 Tencent cloud computing (Beijing) Co., Ltd. 131,072
121.202.0.0/15 AS17924 SmarTone Mobile Communications Ltd 131,072
121.44.0.0/15 AS4739 iiNet Limited 131,072
121.4.0.0/15 AS132203 Tencent cloud computing (Beijing) Co., Ltd. 131,072

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
121.255.181.137 1415243231.icu 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

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

IP Address ASN Details
121.255.0.126 AS9808 China Mobile Communications Group Co., Ltd. 11.24ms from Shanghai, CN

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
20.76.233.128 AS8075 Microsoft Corporation 0.26ms from Amsterdam, NL
170.110.231.16 AS33343 U.S. Department of Commerce, HQ and ITA 5.88ms from Ashburn, US
76.214.162.240 AS7018 AT&T Enterprises, LLC 6.43ms from Columbus, US
59.56.74.128 AS133774 Fuzhou 1.78ms from Fuzhou, CN
90.235.56.96 AS3301 Telia Company AB 10.02ms from Goeteborg, SE
116.107.21.48 AS24086 Viettel Corporation 2.70ms from Hanoi, VN
107.195.51.144 AS7018 AT&T Enterprises, LLC 8.36ms from Houston, US
211.43.133.160 AS17584 Inchon Metropolitan Office Of Education 0.72ms from Incheon, KR
177.89.58.48 AS28220 Alares Cabo Servicos de Telecomunicacoes S.A. 3.15ms from Joao Pessoa, BR
90.66.195.96 AS3215 Orange S.A. 4.09ms from Lyon, FR
212.128.64.48 AS766 RedIRIS Autonomous System 1.35ms from Madrid, ES
80.76.65.176 AS20924 LUTECH S.P.A. 0.72ms from Milan, IT
62.106.119.160 AS8439 JSC AIST 4.22ms from Samara, RU
47.27.219.144 AS20115 Charter Communications LLC 6.79ms from San Jose, US
34.64.137.112 AS396982 Google LLC 0.08ms from Seoul, KR
51.16.71.64 AS16509 Amazon.com, Inc. 1.74ms from Tel Aviv, IL
197.7.173.240 AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom) 13.32ms from Tunis, TN
178.129.63.112 AS28812 PJSC "Bashinformsvyaz" 9.08ms from Yekaterinburg, RU
59.88.163.192 AS9829 National Internet Backbone 12.26ms from Bengaluru, IN
104.128.61.144 AS30455 HostVenom LLC 1.10ms from Chicago, US
68.250.117.192 AS7018 AT&T Enterprises, LLC 4.14ms from Chicago, US
107.11.85.64 AS10796 Charter Communications Inc 9.98ms from Columbus, US
84.157.115.96 AS3320 Deutsche Telekom AG 3.58ms from Frankfurt am Main, DE
178.205.216.208 AS28840 PJSC "TATTELECOM" 13.05ms from Kazan, RU
66.133.165.48 AS5650 Frontier Communications of America, Inc. 17.70ms 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 -f4 -m12 121.255.37.134
traceroute to 121.255.37.134 (121.255.37.134): 12 hops max, 52 byte packets
4 [AS3356] 171.75.8.171 3.875 ms
5 *
7 *
8 [AS9808] 221.183.55.114 158.733 ms
9 [AS9808] 221.183.25.201 237.262 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Coventry, GB
On

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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