Data as of Nov 10, 2026
Autonomous system
AS197479
'GREFNET' Miroslaw Grefkowicz
Announces 1,024 addresses in 4 prefixes. None of it is anonymizer space.
Type
Internet provider
PL
Proxy activity, 30 days
3 exits
Announced prefixes
| Prefix | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|
| 91.222.144.0/22 since Mar 2020 | Residential | 3 | "GREFNET" Miroslaw Grefkowicz | |
| 91.222.144.0/24 since Aug 2020 | Residential | 1 | "GREFNET" Miroslaw Grefkowicz | |
| 91.222.145.0/24 since Oct 2020 | Residential | 1 | "GREFNET" Miroslaw Grefkowicz | |
| 91.222.147.0/24 since Aug 2016 | Residential | 1 | "GREFNET" Miroslaw Grefkowicz |
Residential-proxy exposure
Spread
3
/24s with at least one exit
Providers
11
selling exits here
/24s with the most always-on exits
| /24 | Always-on exits | Proxy exits | |
|---|---|---|---|
| 91.222.144.0/24 | 0 | 1 | |
| 91.222.145.0/24 | 0 | 1 | |
| 91.222.147.0/24 | 0 | 1 |
Proxy providers listing exits
- 2Extract
- AnyIP
- BirdProxies
- DataImpulse
- EnigmaProxy
- FloppyData
- Infatica
- NovaProxy
- QUANTICDATA
- Shifter
- VitalExclusive
Proxy activity
Oct 11, 2026 – Nov 9, 2026
AS197479, day by day
30 observations
Network & history
Profile
- Registered
- Dec 20, 2010
- Domain
- grefnet.pl
- Industry
- Internet Service Provider (ISP)
Routing patterns
How its announcements have moved
Arrivals