O2 Czech Republic, a.s.
AS29321 is O2 Czech Republic, a.s. (centronet.cz). It announces 15,360 IPv4 addresses in 5 prefixes, and 1 IPv6 prefixes.
Czechia· RIPE· allocated 2003-07-31· isp
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- Czechia15,360 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- CentroNetAS
- name
- O2 Czech Republic, a.s.
- org
- ORG-STaN1-RIPE
- org name
- O2 Czech Republic, a.s.
- org address
- Za Brumlovkou 266/2, 140 22, Praha 4 - Michle, CZECH REPUBLIC
- org country
- CZ
- country
- CZ
- source
- ripe
- status
- ASSIGNED
- created
- 2003-07-31
- updated
- 2024-06-20
- descr
- Czech Republic
- remarks
- - IP TRANSIT - / AS16426 - NEJ.CZ
- maintainer
- RIPE-NCC-END-MNT|AS5610-MTN
- abuse name
- Abuse-C Role
- abuse email
- abuse@o2.cz
- abuse kind
- role
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- VPN IP870.57%
- geonix, anyip, mangoproxy0.05%
- None here
- None here
- None here
- None here
- Hosting IP3,58423.33%
- None here
- None here
- None here
- SSH IP500.33%
- SMTP IP190.12%
- 0.08%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2a02:b20::/32 | Czechia | valid | 20 | 2026-10-02 |
Test the real build first.
An evaluation license puts a full current build in your hands — every row, every column, no sampling — so you can measure it against your own traffic before anyone talks about terms.