Data as of Nov 3, 2026
78.136.128.0/18
No anonymizer space · no proxy exits in 30 daysO2 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 |
|---|---|---|---|---|---|---|
| 78.136.128.0/18 | 16,384 | CZ-CZNET-20070509 | O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZ | ALLOCATED PA | Apr 1, 2025 | [email protected] |
| └ 78.136.128.0/22 | 1,024 | CZ-NORDICTELECOMREGIONAL-20070509 | unknown | ASSIGNED PA | Jun 24, 2010 | [email protected] via CZ-CZNET-20070509 |
| └ 78.136.176.0/20 | 4,096 | CZ-NORDICTELECOMREGIONAL-20070509 | unknown | ASSIGNED PA | Sep 29, 2008 | [email protected] via CZ-CZNET-20070509 |
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
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 this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Jun 2007
- Current origin since
- Jun 2007 · 19 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 78.136.128.0/18
- Netname
- CZ-CZNET-20070509
- 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
- AS5610-MTN
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- May 9, 2007
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- Abuse-C Role
- Handle
- AR14410-RIPE