Data as of Nov 7, 2026
194.228.72.0/22
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 the announcement: those covering it, widest first, then every record inside it, 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 |
| └ 194.228.74.0/24 | 256 | IOL-ADSL | Dial-In Network | ASSIGNED PA | Mar 1, 2004 | abuse@ via CZ-CZNET-971003 |
| └ 194.228.75.192/27 | 32 | JAN_ | Na Florenci 2116/15 | ASSIGNED PA | Jan 18, 2023 | 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.
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
1,024 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Residential | 992 | 97% | 2 | |
| Business | 32 | 3.1% | 1 |
Network & registry
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
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 the exact prefix
| 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