2a02:b20::

Prague · Czechia · O2 Czech Republic, a.s.

Registration lookup IPv6 address formats

Autonomous system: AS29321
Country: CZ
Risk score: Not a probability

IP address summary

IP address: 2a02:b20::
ASN: AS29321
Network operator: O2 Czech Republic, a.s.
ISP: O2 Czech Republic, a.s.
Containing network profile: No indexed aggregate
Operator category: Home ISP

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

Public ASN reference

Reference ASN: AS29321
Source label: CentroNetAS O2 Czech Republic, a.s.
Reference interval: 2a02:b20:: to 2a02:b20:ffff:ffff:ffff:ffff:ffff:ffff
Collected: 2026-11-02

IPtoASN maps this address interval to AS29321. 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: Czechia
City: Prague
Region: Prague
Postal code: Not supplied
Timezone: Europe/Prague
Local time: 2026-11-04 00:57:27
Approximate coordinates: 50.107, 14.419

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

Risk score: 0

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

Read exact field definitions

ASN and network operator

AS29321 profile

Organization: O2 Czech Republic, a.s.
ASN domain: centronet.cz
Operator type: Home ISP

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

Network registration

Matching record range: 2a02:b20::/48
Registered network name: CENTRONET-20090320
Registered network block: 2a02:b20::/48
Registration source: RIPENCC WHOIS
Company: CentroNet a.s.
Usage type: residential
Company website: nej.cz

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

Abuse contact

Contact name: CentroNet NOC
Published contact network: 2a02:b20::/48
Abuse email: abuse@centronet.cz
Phone: +420 211 143 000
Postal address: CentroNet, a.s., IT Department, namesti Republiky 1037/3, 110 00 Praha 1, Czech Republic
Contact country: Czechia

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

2a02:b20:: · live response

{
  "ip": "2a02:b20::",
  "isp": {
    "asn": "AS29321",
    "org": "O2 Czech Republic, a.s.",
    "isp": "O2 Czech Republic, a.s."
  },
  "location": {
    "country": "Czechia",
    "country_code": "CZ",
    "city": "Prague",
    "state": "Prague",
    "zipcode": "",
    "latitude": 50.106551599813336,
    "longitude": 14.41936200912814,
    "timezone": "Europe/Prague",
    "localtime": "2026-11-04T00:57:27"
  },
  "risk": {
    "is_mobile": false,
    "is_vpn": false,
    "is_tor": false,
    "is_proxy": false,
    "is_datacenter": false,
    "risk_score": 0
  }
}