1.51.0.0

Beijing · China · China Education and Research Network Center

Autonomous system: AS4538
Country: CN
Weighted risk score: 0; Not a probability

IP address summary

IP address: 1.51.0.0
ASN: AS4538
Network operator: China Education and Research Network Center
ISP: China Education and Research Network Center
Containing network profile: 1.0.0.0/8
Operator category: Academic

The containing profile is the nearest published aggregate. It is not a registry allocation or BGP ownership record.

Public ASN reference

Reference ASN: AS4538
Source label: ERX-CERNET-BKB - China Education and Research Network Center
Reference interval: 1.51.0.0 to 1.51.3.255
Collected: 2026-11-02

IPtoASN maps this address interval to AS4538. An interval is not necessarily a BGP prefix or registered allocation. It does not establish geolocation or ownership.

IPtoASN source Reference methodology

IP geolocation

World map with country boundaries — Approximate network location; not a device positionNatural Earth map data

Country: China
City: Beijing
Region: Beijing
Postal code: Not supplied
Timezone: Asia/Shanghai
Local time: 2026-11-02 20:10:22
Approximate coordinates: 39.922, 116.388

Network-level coordinates do not identify a precise user or device location. How geolocation works

VPN, proxy and network signals

VPNNot listed

ProxyNot listed

TorNot classified

HostingNot classified

MobileNot classified

The score adds 50 for proxy, 50 for Tor, 30 for VPN and 20 for hosting. “Not listed” does not establish safety. Hosting combines Enterprise data and legacy overrides; Tor combines the Enterprise field and legacy list.

Read exact field definitions

ASN and network operator

AS4538 profile

Organization: China Education and Research Network Center
ASN domain: cernet.edu.cn
Operator type: Academic

The ASN organization can differ from the organization using an individual address.

Network registration

Matching record range: 1.51.0.0/16
Registered network name: NJR-CERNET
Registered network block: 1.51.0.0/16
Registration source: APNIC WHOIS
Company: China Education and Research Network
Usage type: business
Company website: cernet.edu.cn

Registration and company fields describe this source record. They can differ from the ASN operator and from live routing announcements.

Abuse contact

Contact name: ABUSE CERNETAP
Published contact network: 1.51.0.0/16
Abuse email: abuse@cernet.edu.cn
Phone: +86-10-62784301
Postal address: Network Center, FIT-3-220, Tsinghua Univ, Beijing 100084, China
Contact country: China

This contact is attached to the network record. Include the source IP, UTC timestamps and relevant logs when reporting abuse.

Actual API response

Open JSON

1.51.0.0 · live response

{
  "ip": "1.51.0.0",
  "isp": {
    "asn": "AS4538",
    "org": "China Education and Research Network Center",
    "isp": "China Education and Research Network Center"
  },
  "location": {
    "country": "China",
    "country_code": "CN",
    "city": "Beijing",
    "state": "Beijing",
    "zipcode": "",
    "latitude": 39.921751599813334,
    "longitude": 116.38839200912814,
    "timezone": "Asia/Shanghai",
    "localtime": "2026-11-02T20:10:22"
  },
  "risk": {
    "is_mobile": false,
    "is_vpn": false,
    "is_tor": false,
    "is_proxy": false,
    "is_datacenter": false,
    "risk_score": 0
  }
}