Data as of Nov 11, 2026
78.156.158.136/29
No anonymizer space · no proxy exits in 30 daysOptoNet Communication, spol. s.r.o.
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 |
|---|---|---|---|---|---|---|
| 78.156.128.0/19 | 8,192 | CZ-OPTONET-20070816 | OptoNet Communication, spol. s.r.o. (ORG-OCLS3-RIPE) · CZ | ALLOCATED PA | Aug 16, 2007 | abuse@ |
| └ 78.156.158.136/29 | 8 | CZ-OptoNET_ | OptoNet Communication, spol. s r.o. office network | ASSIGNED PA | Mar 12, 2009 | abuse@ via CZ-OPTONET-20070816 |
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 78.156.128.0/19
- Prefix
- 78.156.128.0/19
- Announced by
- AS43542 OptoNet Communication, spol. s.r.o.
- Type
- Internet provider
- Proxy exits
- 19
- Always-on exits
- 1
- RPKI
- RPKI valid
- Netname
- CZ-OPTONET-20070816
- Registrant
- OptoNet Communication, spol. s.r.o.
- RIR
- RIPE NCC
Origin network
AS43542
CZ
- Name
- OptoNet Communication, spol. s.r.o.
- Type
- Internet provider
- Registered
- Aug 20, 2007
- Domain
- optonet.cz
- Industry
- Computer and Information Technology
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 78.156.128.0/19
78.156.128.0/19
Routing history
- Pattern
- Stable
- First seen
- Sep 2007
- Current origin since
- Sep 2007 · 19 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 78.156.128.0/19 | AS43542 | /19 | RIPE | RPKI valid |
IRR
Route objects on 78.156.128.0/19
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS43542 | RIPE | CZ-OPTONET-20070816 | MNT-OPTONET | Sep 13, 2007 |
Whois
Registration for this announcement
- Range
- 78.
156. 128. 0/ 19 - Netname
- CZ-OPTONET-20070816
- Registrant
- OptoNet Communication, spol. s.r.o.
- Registrant country
- CZ
- Organization
- OptoNet Communication, spol. s.r.o. (ORG-OCLS3-RIPE)
- Org country
- CZ
- Type
- ALLOCATED PA
- Created
- Aug 16, 2007
- Updated
- Dec 20, 2016
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Aug 16, 2007
- Status
- assigned
Report abuse
Abuse contact
- abuse@
optonet. cz - Name
- ABUSE-C OptoNet Communication
- Handle
- AOC17-RIPE