AS4538 — ERX-CERNET-BKB China Education and Research Network Center

Network type: education

AS4538 announces 179 IPv4 prefixes covering 16,446,976 addresses and 5 IPv6 prefixes.

About this network

ERX-CERNET-BKB — the backbone AS of the China Education and Research Network Center, operator of CERNET, China's national academic and research network.

What it's used for

• Carrying traffic for Chinese universities, colleges, and research institutes: CERNET connects campuses nationwide and provides their route to the wider internet.
• One of the largest ASNs in the world by address count, announcing roughly 16 million IPv4 addresses on behalf of the institutions it serves.

Notable

• This is the CERNET backbone, run by the CERNET Center under China's Ministry of Education. It is a national research and education network (NREN), not a commercial carrier and not an eyeball ISP — though its campus user population is enormous.
• Distinct from the CERNET2/CNGI next-generation IPv6 network, which is operated as a separate ASN. Don't conflate the two, or CERNET with the commercial Chinese carriers.

Interesting

• Scale like this behind a research-and-education network is unusual: most NRENs are a rounding error next to national carriers, but China's higher-education system gives CERNET carrier-sized address holdings.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 1.51.0.0/16
• 1.184.0.0/15
• 42.244.0.0/16
• 42.245.0.0/17
• 42.245.128.0/18
• 42.246.0.0/15
• 49.52.0.0/14
• 49.120.0.0/14
• 49.141.0.0/16
• 49.208.0.0/15
• 58.154.0.0/20
• 58.154.32.0/19
• 58.154.64.0/18
• 58.154.128.0/17
• 58.155.0.0/16
• 58.192.0.0/13
• 58.200.0.0/14
• 58.204.0.0/15
• 58.206.0.0/17
• 58.206.128.0/18
• 58.207.0.0/16
• 59.64.0.0/13
• 59.72.0.0/16
• 59.73.0.0/17
• 59.73.168.0/21
• 59.73.176.0/20
• 59.73.192.0/18
• 59.74.0.0/15
• 59.76.0.0/16
• 59.78.0.0/18
• 59.78.171.0/24
• 59.79.112.0/23
• 59.79.224.0/19
• 101.4.0.0/15
• 101.6.0.0/16
• 101.7.0.0/22
• 101.7.4.0/23
• 101.7.6.0/24
• 101.7.8.0/21
• 101.7.16.0/20
• 101.7.32.0/19
• 101.7.64.0/18
• 101.7.128.0/17
• 101.76.0.0/15
• 103.31.48.0/22
• 103.137.60.0/24
• 103.252.172.0/22
• 110.64.0.0/15
• 111.114.0.0/15
• 111.116.0.0/15
• 111.186.0.0/15
• 113.54.0.0/15
• 114.212.0.0/15
• 114.214.0.0/16
• 115.24.0.0/16
• 115.25.0.0/17
• 115.25.128.0/18
• 115.25.192.0/20
• 115.25.208.0/24
• 115.25.210.0/23
• 115.25.212.0/22
• 115.25.216.0/21
• 115.25.224.0/19
• 115.26.0.0/16
• 115.27.254.0/24
• 115.155.0.0/16
• 115.156.0.0/15
• 115.158.0.0/16
• 116.13.0.0/16
• 116.56.0.0/15
• 118.202.0.0/15
• 118.228.0.0/16
• 118.229.0.0/19
• 118.229.32.0/21
• 118.229.48.0/20
• 118.229.64.0/18
• 118.229.128.0/17
• 118.230.0.0/16
• 120.94.0.0/15
• 121.48.0.0/15
• 121.52.160.0/19
• 121.192.0.0/14
• 121.248.0.0/14
• 122.204.0.0/14
• 125.216.0.0/13
• 162.105.0.0/16
• 166.111.0.0/16
• 175.185.0.0/16
• 175.186.0.0/15
• 180.84.0.0/15
• 180.201.0.0/16
• 180.208.0.0/19
• 180.208.32.0/20
• 180.208.48.0/21
• 180.208.56.0/23
• 180.208.58.0/24
• 180.208.60.0/22
• 180.208.64.0/18
• 180.208.128.0/17
• 180.209.0.0/16

and 84 more.

Upstream networks

• AS23764 CTGNet
• AS4837 CHINA UNICOM China169 Backbone
• AS4134 No.31,Jin-rong Street
• AS6939 Hurricane Electric LLC
• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS4635 Hong Kong Internet Exchange--Route Server 1
• AS58453 China Mobile International Limited
• AS1299 Arelion Sweden AB
• AS2914 NTT America, Inc.
• AS174 Cogent Communications, LLC
• AS140570 Hong Kong Beecloud System Technology Services Limited
• AS23911 China Next Generation Internet Beijing IX
• AS24482 SG.GS
• AS3491 PCCW Global (HK) Ltd.
• AS20965 GEANT Vereniging
• AS8359 MTS PJSC
• AS9930 TIME dotCom Berhad No. 14, Jalan Majistret U1/26 Hicom Glenmarie Industrial Park 40150 Shah Alam Selangor, Malaysia
• AS7497 Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)
• AS23910 China Next Generation Internet CERNET2
• AS7660 Asia Pacific Advanced Network - Japan
• AS9808 China Mobile Communications Group Co., Ltd.
• AS23855 Singapore Advanced Research and Education Network

Downstream networks

• AS139139 Shenyang Agricultural University
• AS133111 CERNET New Technology Co., Ltd
• AS9405 Test platform Service Center
• AS24348 CERNET2 IX at Tsinghua University
• AS151229 Shenyang Aerospace University
• AS24357 CERNET2 IX at South China University of Technology
• AS24310 Net-Glyph Data Center
• AS24364 CERNET2 IX at Shanghai Jiaotong University
• AS24361 CERNET2 IX at Southeast University
• AS133465 Duke Kunshan University
• AS24349 CERNET2 IX at Peking University
• AS24358 CERNET2 IX at Huazhong University of Science and Technology
• AS131578 Beijing Foreign Studies University
• AS24369 CERNET2 IX at Northeast University
• AS24353 CERNET2 IX at Xi'an Jiaotong University
• AS24371 CERNET2 IX at Jilin University
• AS24352 CERNET2 IX at Tianjin University
• AS134169 CERNEWTECH (Beijing) co.,LTD
• AS23910 China Next Generation Internet CERNET2
• AS23911 China Next Generation Internet Beijing IX
• AS138441 CERNET2 regional IX at Xinjiang University

Adjacent networks

• AS23764 CTGNet
• AS4134 No.31,Jin-rong Street
• AS4837 CHINA UNICOM China169 Backbone
• AS6939 Hurricane Electric LLC
• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS4635 Hong Kong Internet Exchange--Route Server 1
• AS58453 China Mobile International Limited
• AS1299 Arelion Sweden AB
• AS23910 China Next Generation Internet CERNET2
• AS23911 China Next Generation Internet Beijing IX
• AS174 Cogent Communications, LLC
• AS2914 NTT America, Inc.
• AS140570 Hong Kong Beecloud System Technology Services Limited
• AS24482 SG.GS
• AS3491 PCCW Global (HK) Ltd.
• AS139139 Shenyang Agricultural University
• AS133111 CERNET New Technology Co., Ltd
• AS9405 Test platform Service Center
• AS20965 GEANT Vereniging
• AS24348 CERNET2 IX at Tsinghua University
• AS24361 CERNET2 IX at Southeast University
• AS8359 MTS PJSC
• AS9930 TIME dotCom Berhad No. 14, Jalan Majistret U1/26 Hicom Glenmarie Industrial Park 40150 Shah Alam Selangor, Malaysia
• AS151229 Shenyang Aerospace University
• AS24357 CERNET2 IX at South China University of Technology

Internet exchanges

• Hong Kong Internet Exchange — Hong Kong, China