Data as of Nov 8, 2026
81.90.165.208/28
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 |
|---|---|---|---|---|---|---|
| 81.90.160.0/20 | 4,096 | CZ-CZNET-20020704 | O2 Czech Republic, a.s. (ORG-STAN1-RIPE) · CZ | ALLOCATED PA | Nov 14, 2017 | abuse@ |
| └ 81.90.165.208/28 | 16 | CZ-MMCOMPNET | Martin Mazanec - MM-PERSONAL COMPUTER | ASSIGNED PA | Jul 20, 2007 | abuse@ via CZ-CZNET-20020704 |
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 81.90.160.0/20
- Prefix
- 81.90.160.0/20
- Announced by
- AS5610 O2 Czech Republic, a.s.
- Type
- Residential
- Proxy exits
- 47
- Always-on exits
- 6
- RPKI
- RPKI valid
- Netname
- CZ-CZNET-20020704
- Registrant
- O2 Czech Republic, a.s.
- RIR
- RIPE NCC
Routing timeline
Who has announced 81.90.160.0/20
81.90.160.0/20
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Nov 2016 · 10 yr
- Origin networks
- 2
- Last change of origin
- Nov 2016
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 81.90.160.0/20 | AS5610 | /20 | RIPE | RPKI valid |
IRR
Route objects on 81.90.160.0/20
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS5610 | RIPE | O2 InternetHome TermsNet | AS5610-MTN | Nov 15, 2016 |
Whois
Registration for this announcement
- Range
- 81.
90. 160. 0/ 20 - Netname
- CZ-CZNET-20020704
- 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
- Nov 14, 2017
- Updated
- Dec 18, 2018
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Jul 4, 2002
- Status
- assigned
Report abuse
Abuse contact
- abuse@
o2. cz - Name
- Abuse-C Role
- Handle
- AR14410-RIPE