Data as of Nov 7, 2026
194.228.73.0/24
No anonymizer space · no proxy exits in 30 daysO2 Czech Republic, a.s.
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 194.228.0.0/17 since May 2005 | AS5610 | Residential | 42 3 always on | O2 Czech Republic, a.s. | |
| 194.228.0.0/16 since May 2005 | AS5610 | Residential | 64 3 always on | O2 Czech Republic, a.s. |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 194.228.0.0/16 | 65,536 | CZ-CZNET-971003 | O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZ | ALLOCATED PA | Jun 13, 2002 | abuse@ |
| └ 194.228.73.0/24 | 256 | INDOS | Internet for school | ASSIGNED PA | Aug 28, 2002 | abuse@ via CZ-CZNET-971003 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
Announced by
Covering announcement 194.228.72.0/22
- Prefix
- 194.228.72.0/22
- Announced by
- AS5610 O2 Czech Republic, a.s.
- Type
- Residential
- RPKI
- RPKI valid
- Netname
- CZ-CZNET-971003
- Registrant
- O2 Czech Republic, a.s.
- RIR
- RIPE NCC
Routing timeline
Covering aggregate above, the prefix's own history below
194.228.72.0/22
Routing history
- Pattern
- Stable
- First seen
- Jun 2015
- Current origin since
- Jun 2024 · 2.4 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 194.228.72.0/22 | AS5610 | /22 | RIPE | RPKI valid |
| 194.228.0.0/17 | AS5610 | /17 | RIPE | Too specific |
| 194.228.0.0/16 | AS5610 | /16 | RIPE | Too specific |
IRR
Route objects on 194.228.72.0/22
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS5610 | RIPE | CZ.CZNET | AS5610-MTN | May 25, 2015 |
Whois
Registration for this announcement
- Range
- 194.
228. 0. 0/ 16 - Netname
- CZ-CZNET-971003
- Registrant
- O2 Czech Republic, a.s.
- Registrant country
- CZ
- Organization
- O2 Czech Republic, a.s. (ORG-STAN1-RIPE)
- Org country
- CZ
- Type
- ALLOCATED PA
- Created
- Jun 13, 2002
- Updated
- May 21, 2018
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Oct 3, 1997
- Status
- assigned
Report abuse
Abuse contact
- abuse@
o2. cz - Name
- Abuse-C Role
- Handle
- AR14410-RIPE