All ASNs

Autonomous System details for AS4538

AS4538
China Education and Research Network Center • cernet.edu.cn

AS4538 — China Education and Research Network Center

AS Name
ERX-CERNET-BKB
Country
China (CN)
Website
Number of IPv4
42,739,456
Number of IPv6
6.48 × 1030
ASN type
Education
Status
Allocated
Registry
APNIC
Allocated
August 01, 2002
Last updated
October 31, 2025

IP Ranges

5,065 IPv4 prefixes, 922 IPv6 prefixes
Prefix Company Number of IPs
1.51.0.0/16 China Education and Research Network 65,536
1.51.3.0/24 China Education and Research Network 256
1.51.16.0/20 China Education and Research Network 4,096
1.51.32.0/20 China Education and Research Network 4,096
1.51.48.0/21 China Education and Research Network 2,048
1.51.112.0/24 China Education and Research Network 256
1.51.120.0/21 China Education and Research Network 2,048
1.51.144.0/20 China Education and Research Network 4,096
1.51.144.0/21 China Education and Research Network 2,048
1.51.152.0/21 China Education and Research Network 2,048
1.51.160.0/21 China Education and Research Network 2,048
1.51.168.0/21 China Education and Research Network 2,048
1.51.176.0/20 China Education and Research Network 4,096
1.51.192.0/18 China Education and Research Network 16,384
1.184.0.0/15 China Education and Research Network 131,072
1.184.192.0/18 China Education and Research Network 16,384
1.185.0.0/18 China Education and Research Network 16,384
1.185.64.0/19 China Education and Research Network 8,192
1.185.192.0/18 China Education and Research Network 16,384
42.244.0.0/16 China Education and Research Network 65,536
42.244.0.0/18 China Education and Research Network 16,384
42.244.64.0/20 China Education and Research Network 4,096
42.245.0.0/16 China Education and Research Network 65,536
42.246.0.0/15 China Education and Research Network 131,072
42.247.0.0/19 Wuhan, Hubei 430074, China 8,192
42.247.1.0/24 Chengdu, Sichuan 610054, China 256
42.247.2.0/24 China Education and Research Network 256
42.247.3.0/24 China Education and Research Network 256
42.247.5.0/24 China Education and Research Network 256
42.247.8.0/24 China Education and Research Network 256
42.247.9.0/24 China Education and Research Network 256
42.247.12.0/24 China Education and Research Network 256
42.247.13.0/24 China Education and Research Network 256
42.247.18.0/24 Shanghai 200030, China 256
42.247.19.0/24 China Education and Research Network 256
42.247.20.0/24 China Education and Research Network 256
42.247.22.0/24 China Education and Research Network 256
42.247.29.0/24 China Education and Research Network 256
42.247.30.0/24 Shenyang, Liaoning 110004, China 256
42.247.44.0/24 China Education and Research Network 256
42.247.53.0/24 China Education and Research Network 256
42.247.58.0/24 China Education and Research Network 256
42.247.103.0/24 China Education and Research Network 256
42.247.107.0/24 China Education and Research Network 256
42.247.113.0/24 China Education and Research Network 256
49.52.0.0/14 China Education and Research Network 262,144
49.52.0.0/15 China Education and Research Network 131,072
49.52.0.0/19 China Education and Research Network 8,192
49.52.32.0/20 China Education and Research Network 4,096
49.52.64.0/19 China Education and Research Network 8,192
49.52.96.0/20 China Education and Research Network 4,096
49.120.0.0/14 China Education and Research Network 262,144
49.120.64.0/19 China Education and Research Network 8,192
49.122.0.0/20 China Education and Research Network 4,096
49.122.16.0/21 China Education and Research Network 2,048
49.122.24.0/21 China Education and Research Network 2,048
49.122.32.0/20 China Education and Research Network 4,096
49.122.64.0/22 China Education and Research Network 1,024
49.122.128.0/18 China Education and Research Network 16,384
49.122.191.0/24 China Education and Research Network 256
49.123.0.0/20 China Education and Research Network 4,096
49.123.16.0/21 China Education and Research Network 2,048
49.123.64.0/18 China Education and Research Network 16,384
49.140.0.0/15 China Education and Research Network 131,072
49.140.0.0/16 China Education and Research Network 65,536
49.141.0.0/20 China Education and Research Network 4,096
49.141.16.0/21 China Education and Research Network 2,048
49.141.24.0/21 China Education and Research Network 2,048
49.141.32.0/20 China Education and Research Network 4,096
49.141.64.0/18 China Education and Research Network 16,384
49.141.128.0/20 China Education and Research Network 4,096
49.141.144.0/21 China Education and Research Network 2,048
49.141.192.0/20 China Education and Research Network 4,096
49.141.210.0/24 China Education and Research Network 256
49.208.0.0/15 China Education and Research Network 131,072
49.208.0.0/17 China Education and Research Network 32,768
49.209.0.0/20 China Education and Research Network 4,096
49.209.16.0/20 China Education and Research Network 4,096
49.209.32.0/19 China Education and Research Network 8,192
49.209.64.0/18 China Education and Research Network 16,384
49.209.232.0/21 China Education and Research Network 2,048
49.209.240.0/20 China Education and Research Network 4,096
58.154.0.0/15 China Education and Research Network 131,072
58.154.0.0/20 China Education and Research Network 4,096
58.154.16.0/20 China Education and Research Network 4,096
58.154.32.0/23 China Education and Research Network 512
58.154.34.0/24 China Education and Research Network 256
58.154.37.0/24 China Education and Research Network 256
58.154.48.0/20 China Education and Research Network 4,096
58.154.96.0/20 China Education and Research Network 4,096
58.154.128.0/20 China Education and Research Network 4,096
58.154.144.0/20 China Education and Research Network 4,096
58.154.160.0/19 China Education and Research Network 8,192
58.154.192.0/19 China Education and Research Network 8,192
58.154.224.0/20 China Education and Research Network 4,096
58.154.240.0/20 China Education and Research Network 4,096
58.155.0.0/16 China Education and Research Network 65,536
58.155.0.0/20 China Education and Research Network 4,096
58.155.16.0/21 China Education and Research Network 2,048
58.155.24.0/21 China Education and Research Network 2,048
2001:250:2::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:205::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:206::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:207::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:208::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:209::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:20a::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:20b::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:20c::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:20f::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:210::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:212::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:214::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:215::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:218::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:219::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:21b::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:21e::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:21f::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:223::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:228::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:22b::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:22d::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:22e::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:230::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:231::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:234::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:236::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:237::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:238::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:23a::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:23b::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:23c::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:23d::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:24f::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:251::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:803::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:101f::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5002::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5003::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5004::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5005::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5006::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5007::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5008::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5009::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:500a::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:500b::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:500c::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:500d::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:500e::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:500f::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5010::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5012::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5013::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5014::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5015::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5016::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5017::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5018::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5019::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:501a::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:501b::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:501c::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:501d::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:501e::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:501f::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5020::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5021::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5022::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5023::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5024::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5025::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5026::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5027::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5028::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5029::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:502a::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:502b::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:502c::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:502d::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:502e::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:502f::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5030::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5031::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5032::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5033::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5034::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5035::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5036::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5037::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5038::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5039::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:503a::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:503b::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:503c::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:503d::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:503e::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:503f::/48 CERNET IPv6 Backbone 1.21 × 1024
2001:250:5040::/48 CERNET IPv6 Backbone 1.21 × 1024

This table only shows the first 100 of the set of IPv4 and IPv6 prefixes. All data is available via our IP data API.

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS4538

37 peers
AS4637 AS7473 AS7660 AS14537 AS17639 AS18106 AS23673 AS23855 AS24348 AS24349 AS24350 AS24353 AS24355 AS24357 AS24358 AS24363 AS24364 AS24371 AS24372 AS24482 AS35280 AS39120 AS55720 AS132337 AS138369 AS138378 AS4837 AS7497 AS7713 AS8359 AS8966 AS24352 AS24362 AS24370 AS49544 AS138371 AS140627

AS4538 peers with these other Autonomous Systems.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS4538

11 upstreams
AS174 AS1299 AS2914 AS3491 AS4134 AS6453 AS6939 AS9808 AS23764 AS58453 AS140570

AS4538 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS4538 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS4538

10 downstreams
AS9405 AS23911 AS24361 AS24369 AS131578 AS133111 AS133465 AS134169 AS139139 AS151229

AS4538 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.

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