2a01:4fc0::

Düsseldorf · Germany · CSL Computer Service Langenbach GmbH

Hosting

Registration lookup IPv6 address formats

Autonomous system: AS5517
Country: DE
Risk score: Not a probability

IP address summary

IP address: 2a01:4fc0::
ASN: AS5517
Network operator: CSL Computer Service Langenbach GmbH
ISP: CSL Computer Service Langenbach GmbH
Containing network profile: No indexed aggregate
Operator category: Hosting

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

Public ASN reference

Reference ASN: AS5517
Source label: CSL CSL Computer Service Langenbach GmbH
Reference interval: 2a01:4fc0:: to 2a01:4fc0:3fff:ffff:ffff:ffff:ffff:ffff
Collected: 2026-11-02

IPtoASN maps this address interval to AS5517. 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: Germany
City: Düsseldorf
Region: North Rhine-Westphalia
Postal code: Not supplied
Timezone: Europe/Berlin
Local time: 2026-11-04 16:18:01
Approximate coordinates: 51.237, 6.770

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

HostingClassified

MobileNot classified

Risk score: 20

A low score is not proof that an address is safe.

Read exact field definitions

ASN and network operator

AS5517 profile

Organization: CSL Computer Service Langenbach GmbH
ASN domain: nrw.net
Operator type: Hosting

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

Network registration

Matching record range: 2a01:4fc0::/34
Registered network name: DE-CSL-GMBH-20120531
Registered network block: 2a01:4fc0::/32
Registration source: RIPENCC WHOIS
Company: CSL Computer Service Langenbach GmbH
Usage type: hosting
Company website: csl.de

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

Abuse contact

Contact name: CSL Computer Service Langenbach GmbH
Published contact network: 2a01:4fc0::/32
Abuse email: abuse@nrw.net
Phone: +49 211 86767 0
Postal address: Hansaallee 191-193 D-40549 Duesseldorf Germany
Contact country: Germany

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

2a01:4fc0:: · live response

{
  "ip": "2a01:4fc0::",
  "isp": {
    "asn": "AS5517",
    "org": "CSL Computer Service Langenbach GmbH",
    "isp": "CSL Computer Service Langenbach GmbH"
  },
  "location": {
    "country": "Germany",
    "country_code": "DE",
    "city": "Düsseldorf",
    "state": "North Rhine-Westphalia",
    "zipcode": "",
    "latitude": 51.23744159981334,
    "longitude": 6.77043200912814,
    "timezone": "Europe/Berlin",
    "localtime": "2026-11-04T16:18:01"
  },
  "risk": {
    "is_mobile": false,
    "is_vpn": false,
    "is_tor": false,
    "is_proxy": false,
    "is_datacenter": true,
    "risk_score": 20
  }
}