Data as of Nov 7, 2026
37.72.121.0/24
19 residential-proxy exits · 30 daysSpoldzielnia Telekomunikacyjna OST
Residential-proxy exits
Proxy exits
19
7.4% of its addresses · 30 days
Providers
39
selling exits here
Oct 8, 2026 – Nov 6, 2026
Exits seen per day
1.7K observations
Proxy providers listing exits
- 2Extract
- Ake.net
- AnyIP
- BartProxies
- BirdProxies
- BottingTools
- ByteProxies
- Byteful
- CliProxy
- EZProxies
- EnigmaProxy
- FastProxy
- FlexyProxies
- FloppyData
- GSocks
- GloryCloud
- GonzoProxy
- IPPeak
- Infatica
- KindProxy
- KocerRoxy
- LemonBright
- LemonPrime
- LudaxProxy
- MangoProxy
- NodeProxy
- NovProxy
- NovaProxy
- Novada
- Proxiware
- Proxy4U
- ProxyEmpire
- Proxyma
- RainProxy
- Shifter
- Thordata
- TrueProxies
- VantageProxies
- VitalExclusive
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 |
|---|---|---|---|---|---|---|
| 37.72.120.0/21 | 2,048 | PL-OST-20120127 | Spoldzielnia Telekomunikacyjna OST (ORG-OSTW2-RIPE) · PL | ALLOCATED PA | Jan 27, 2012 | abuse@ |
| └ 37.72.120.0/22 | 1,024 | OST-ISP-NET7 | Spoldzielnia Telekomunikacyjna OST | ASSIGNED PA | Dec 12, 2012 | abuse@ via PL-OST-20120127 |
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 37.72.120.0/21
- Prefix
- 37.72.120.0/21
- Announced by
- AS38987 Spoldzielnia Telekomunikacyjna OST
- Type
- Residential
- Proxy exits
- 170
- RPKI
- RPKI valid
- Netname
- PL-OST-20120127
- Registrant
- Spoldzielnia Telekomunikacyjna OST
- RIR
- RIPE NCC
Origin network
AS38987
PL
- Name
- Spoldzielnia Telekomunikacyjna OST
- Type
- Internet provider
- Registered
- Nov 23, 2005
- Domain
- ostnet.pl
- Website
- www.ostnet.pl
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 37.72.120.0/21
37.72.120.0/21
Routing history
- Pattern
- Stable
- First seen
- Feb 2012
- Current origin since
- Feb 2012 · 15 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 37.72.120.0/21 | AS38987 | /21 | RIPE | RPKI valid |
IRR
Route objects on 37.72.120.0/21
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS38987 | RIPE | Spoldzielnia Telekomunikacyjna OST | OST-MNT | Sep 24, 2013 |
Whois
Registration for this announcement
- Range
- 37.
72. 120. 0/ 21 - Netname
- PL-OST-20120127
- Registrant
- Spoldzielnia Telekomunikacyjna OST
- Registrant country
- PL
- Organization
- Spoldzielnia Telekomunikacyjna OST (ORG-OSTW2-RIPE)
- Org country
- PL
- Type
- ALLOCATED PA
- Created
- Jan 27, 2012
- Updated
- Oct 24, 2025
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- PL
- Delegated
- Jan 27, 2012
- Status
- assigned
Report abuse
Abuse contact
- abuse@
ostnet. pl - Name
- OST CORE IP NETWORK ADMINISTRATORS
- Handle
- OCIN1-RIPE