Data as of Nov 3, 2026
178.17.86.0/24
No anonymizer space · no proxy exits in 30 daysO2 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 |
|---|---|---|---|---|---|---|
| 178.17.80.0 - 178.17.111.255 | 8,192 | CZ-CZNET-20100318 | O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZ | ALLOCATED PA | Apr 1, 2025 | [email protected] |
| └ 178.17.86.0/24 | 256 | CZ-NORDICTELECOMREGIONAL-20100318 | unknown | ASSIGNED PA | Apr 7, 2010 | [email protected] 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 178.17.80.0/20
- Prefix
- 178.17.80.0/20
- Announced by
- AS42908 O2 Czech Republic, a.s.
- Type
- Residential
- Proxy exits
- 2
- RPKI
- RPKI valid
- Netname
- CZ-CZNET-20100318
- Registrant
- O2 Czech Republic, a.s.
- RIR
- RIPE NCC
Origin network
AS42908
CZ
- Name
- O2 Czech Republic, a.s.
- Type
- Internet provider
- Registered
- May 9, 2007
- Domain
- nordictelecom.cz
- Website
- www.nordictelecom.cz/
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 178.17.80.0/20
178.17.80.0/20
Routing history
- Pattern
- Rotating
- First seen
- May 2010
- Current origin since
- Feb 2025 · 1.7 yr
- Origin networks
- 3
- Last change of origin
- Feb 2025
Recorded history
History
- Handoffs
- 2
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 178.17.80.0/20 | AS42908 | /20 | RIPE | RPKI valid |
IRR
Route objects on 178.17.80.0/20
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS42908 | RIPE | MNT-NORDICTELECOM AS5610-MTN | Apr 1, 2025 |
Whois
Registration for this announcement
- Range
- 178.17.80.0 - 178.17.111.255
- 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
- Apr 1, 2025
- Updated
- Apr 1, 2025
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Mar 18, 2010
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- Abuse-C Role
- Handle
- AR14410-RIPE