Data as of Nov 11, 2026
178.72.255.0/24
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 |
|---|---|---|---|---|---|
| 178.72.192.0/18 since Mar 2018 | AS41046 | Residential | 25 4 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 |
|---|---|---|---|---|---|---|
| 178.72.192.0/18 | 16,384 | CZ-CZNET-20100318 | O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZ | ALLOCATED PA | Dec 28, 2017 | abuse@ |
| └ 178.72.255.0/24 | 256 | NEJCZ | unknown | ASSIGNED PA | May 6, 2019 | abuse@ via CZ-CZNET-20100318 |
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 178.72.224.0/19
- Prefix
- 178.72.224.0/19
- Announced by
- AS41046 O2 Czech Republic, a.s.
- Type
- Residential
- Proxy exits
- 14
- Always-on exits
- 1
- RPKI
- RPKI valid
- Netname
- CZ-CZNET-20100318
- Registrant
- O2 Czech Republic, a.s.
- RIR
- RIPE NCC
Origin network
AS41046
CZ
- Name
- O2 Czech Republic, a.s.
- Type
- Internet provider
- Registered
- Jun 6, 2006
- Domain
- o2.cz
- Website
- www.nej.cz
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
178.72.224.0/19
Routing history
- Pattern
- Stable
- First seen
- Mar 2018
- Current origin since
- Mar 2018 · 8.6 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 178.72.224.0/19 | AS41046 | /19 | RIPE | RPKI valid |
| 178.72.192.0/18 | AS41046 | /18 | RIPE | Too specific |
IRR
Route objects on 178.72.224.0/19
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS41046 | RIPE | KTVTRINEC-MNT | Mar 28, 2018 |
Whois
Registration for this announcement
- Range
- 178.
72. 192. 0/ 18 - Netname
- CZ-CZNET-20100318
- 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
- Dec 28, 2017
- Updated
- Jun 20, 2024
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Mar 18, 2010
- Status
- assigned
Report abuse
Abuse contact
- abuse@
o2. cz - Name
- Abuse-C Role
- Handle
- AR14410-RIPE