Data as of Nov 11, 2026
77.75.72.0/23
No anonymizer space · no proxy exits in 30 daysSeznam.cz, 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 |
|---|---|---|---|---|---|---|
| 77.75.72.0/21 | 2,048 | CZ-SEZNAM-20070507 | Seznam.cz, a.s. (ORG-SA508-RIPE) · CZ | ALLOCATED PA | May 7, 2007 | abuse@ |
| └ 77.75.72.0/24 | 256 | SEZNAM-CZ | Seznam.cz, a.s. (ORG-SA508-RIPE) · CZ | ASSIGNED PA | May 8, 2007 | abuse@ |
| └ 77.75.73.0/24 | 256 | CZ-SEZNAM-20070605 | Seznam.cz, a.s. | ASSIGNED PA | Jun 6, 2007 | abuse@ via CZ-SEZNAM-20070507 |
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
AS43037
CZ
- Name
- Seznam.cz, a.s.
- Type
- Business
- Registered
- May 29, 2007
- Domain
- seznam.cz
- Website
- www.seznam.cz
- Industry
- Hosting and Cloud Provider
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Jun 2007
- Current origin since
- Aug 2016 · 10 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 77.75.72.0/23 | AS43037 | /23 | RIPE | RPKI valid |
| 77.75.72.0/21 | AS43037 | /21 | RIPE | Too specific |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS43037 | RIPE | SEZNAM - I | SEZNAM-MNT | Sep 20, 2007 |
Whois
Registration for this announcement
- Range
- 77.
75. 72. 0/ 21 - Netname
- CZ-SEZNAM-20070507
- Registrant
- Seznam.cz, a.s.
- Registrant country
- CZ
- Organization
- Seznam.cz, a.s. (ORG-SA508-RIPE)
- Org country
- CZ
- Type
- ALLOCATED PA
- Created
- May 7, 2007
- Updated
- Aug 11, 2016
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- May 7, 2007
- Status
- assigned
Report abuse
Abuse contact
- abuse@
seznam. cz - Name
- abuse department
- Handle
- AD10910-RIPE