IPLibre
IPLibre
Enter an IPv4, IPv6, or ASN to retrieve geolocation, network, company, privacy and abuse details. You can also query it via the API or download the database.
The ASN (Autonomous System Number) is a unique number assigned to an autonomous system, used to identify the network. ASN
AS4538
The RIR (Regional Internet Registry) is the organization responsible for managing ASN allocation in a specific region. RIR
APNIC
The type of ASN. Can be business, isp, hosting, government, or education. Type
education
Website
cernet.edu.cnRelated ASNs have the same name or website. Related
IPv4 CIDRs
4886
IPv4 addresses
37999360
IPv6 CIDRs
247
IPv6 addresses
599392312
| AS2914 | |
| AS4837 | |
| AS23910 | - |
| AS6453 | |
| AS4134 | |
| AS3491 | |
| AS4635 | |
| AS23764 | |
| AS6939 | |
| AS140570 | |
| AS9002 | |
| AS1299 | |
| AS58453 | |
| AS174 | |
| AS139139 | |
| AS23911 | |
| AS9405 | |
| AS131578 | |
| AS24361 | |
| AS139139 | |
| AS24350 | |
| AS24369 | |
| AS23910 | - |
| AS9405 | |
| AS133465 | |
| AS24371 | |
| AS146782 | |
| AS24352 | |
| AS4635 | |
| AS23764 | |
| AS24482 | |
| AS3491 | |
| AS174 | |
| AS24363 | |
| AS24348 | |
| AS24364 | |
| AS23911 | |
| AS24349 | |
| AS6453 | |
| AS140570 | |
| AS24353 | |
| AS4837 | |
| AS2914 | |
| AS138371 | |
| AS9808 | |
| AS24370 | |
| AS4134 | |
| AS7497 | |
| AS9002 | |
| AS131578 | |
| AS24362 | |
| AS133111 | |
| AS138378 | |
| AS24355 | |
| AS58453 | |
| AS24361 | |
| AS6939 | |
| AS24357 | |
| AS1299 | |
| 1.51.0.0/16 |
| 1.51.192.0/18 |
| 1.51.3.0/24 |
| 1.51.16.0/20 |
| 1.51.120.0/21 |
| 2001:250:5800::/48 |
| 2001:250:5801::/48 |
| 2001:250:5802::/48 |
| 2001:250:5803::/48 |
| 2001:250:5809::/48 |
City
-
Country
Coordinates
0, 0
Timezone
-
We transparently share the source used to determine a likely location for this IP address. Source
whois
curl iplib.re/AS4538
{
"network": {
"rir": "APNIC",
"asn": 4538,
"name": "China Education and Research Network Center",
"type": "education",
"website": "cernet.edu.cn",
"related": [
24361,
24352,
9405,
24362,
24364,
24489,
24369,
24370,
24372,
24349,
24357,
24358,
24371,
132553,
38255,
38027,
24490,
24355,
24350,
138371,
138378,
23911,
24363,
138369,
9401,
24353,
24302,
24348
]
},
"connectivity": {
"upstreams": [
2914,
4837,
23910,
6453,
4134
],
"downstreams": [
139139,
23911,
9405,
131578,
24361
],
"peers": [
139139,
24350,
24369,
23910,
9405
]
},
"location": {
"source": "whois"
},
"abuse": {
"email": "abuse@cernet.edu.cn",
"phone": "+86-10-2595931"
},
"ipv4": {
"ranges": [
"1.51.0.0/16",
"1.51.192.0/18",
"1.51.3.0/24",
"1.51.16.0/20",
"1.51.120.0/21"
],
"cidrs": 4886,
"ips": 37999360
},
"ipv6": {
"ranges": [
"2001:250:5800::/48",
"2001:250:5801::/48",
"2001:250:5802::/48",
"2001:250:5803::/48",
"2001:250:5809::/48"
],
"cidrs": 247,
"ips": 599392312
}
}