Data as of Nov 8, 2026
212.87.228.0/24
1 residential-proxy exit · 30 daysPolitechnika Czestochowska
Residential-proxy exits
Proxy exits
1
0.39% of its addresses · 30 days
Providers
3
selling exits here
Oct 9, 2026 – Nov 7, 2026
Exits seen per day
201 observations
Proxy providers listing exits
- RainProxy
- Shifter
- ZENPROXY_PREMIUM
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 |
|---|---|---|---|---|---|---|
| 212.87.224.0/19 | 8,192 | PL-CZESTMAN-20000519 | Politechnika Czestochowska (ORG-PC2-RIPE) · PL | ALLOCATED PA | — | abuse@ |
| └ 212.87.224.0/21 | 2,048 | PCZ-NET | Politechnika Czestochowska (ORG-PC2-RIPE) · PL | ASSIGNED PA | — | abuse@ |
Network & registry
Announced by
Covering announcement 212.87.224.0/21
- Prefix
- 212.87.224.0/21
- Announced by
- AS15373 Politechnika Czestochowska
- Type
- Business
- Proxy exits
- 19
- Always-on exits
- 1
- RPKI
- RPKI valid
- Netname
- PCZ-NET
- Registrant
- Politechnika Czestochowska
- RIR
- RIPE NCC
Registry
Holder
- Organization
- Politechnika Czestochowska
- Handle
- ORG-PC2-RIPE
- Range
- 212.
87. 224. 0/ 19 - Registration type
- ALLOCATED PA
Origin network
AS15373
PL
- Name
- Politechnika Czestochowska
- Type
- Education
- Registered
- Jun 7, 2000
- Domain
- pcz.pl
- Industry
- Colleges, Universities, and Professional Schools
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 212.87.224.0/21
212.87.224.0/21
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 22 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 212.87.224.0/21 | AS15373 | /21 | RIPE | RPKI valid |
IRR
Route objects on 212.87.224.0/21
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS15373 | RIPE | The network of Czestochowa University of Technology | PL-CZESTMAN-MNT | Apr 2, 2026 |
Whois
Registration for this announcement
- Range
- 212.
87. 224. 0/ 21 - Netname
- PCZ-NET
- Registrant
- Politechnika Czestochowska
- Registrant country
- PL
- Organization
- Politechnika Czestochowska (ORG-PC2-RIPE)
- Org country
- PL
- Type
- ASSIGNED PA
- Created
- Not stated by the registry
- Updated
- Apr 2, 2026
- Maintainer
- PL-CZESTMAN-MNT
- RIR
- RIPE NCC
- Country
- PL
- Delegated
- May 19, 2000
- Status
- assigned
Report abuse
Abuse contact
- abuse@
man. pcz. pl - Name
- CzestMAN Operations
- Handle
- CZ512-RIPE