Data as of Nov 7, 2026
37.221.250.0/23
24 residential-proxy exits · 30 daysJiri Tlapak · space held by ISP Alliance a.s.
Residential-proxy exits
Proxy exits
24
4.7% of its addresses · 30 days
Always-on exits
5
21% of its exits
Spread
2 of 2
/24s with at least one exit
Providers
62
selling exits here
Oct 8, 2026 – Nov 6, 2026
Exits seen per day
15K observations
/24s with the most always-on exits
| /24 | Always-on exits | Proxy exits | |
|---|---|---|---|
| 37.221.250.0/24 | 3 | 15 | |
| 37.221.251.0/24 | 2 | 9 |
Proxy providers listing exits
- 2Captcha
- 711Proxy
- 9Proxy
- Ake.net
- AnyIP
- BirdProxies
- BottingTools
- Bright Data
- ByteProxies
- Byteful
- CliProxy
- CoreProxy
- DataImpulse
- Datarama
- Decodo
- EZProxies
- EnigmaProxy
- Evomi
- FastProxy
- FlashProxy
- GSocks
- Geonix
- Geonode
- GloryCloud
- GoProxies
- GonzoProxy
- HydraProxy
- IPFly
- IPOasis
- IPPeak
- IPRoyal
- Infatica
- InfiniteProxies
- LemonBright
- LightningProxies
- MangoProxy
- NSocks
- NodeMaven
- NodeProxy
- NovProxy
- NovaProxy
- Novada
- Oxylabs
- Proxiware
- Proxy-Seller
- Proxy4U
- ProxyEmpire
- ProxyGeo
- ProxyRack
- ProxyWing
- Proxyma
- PuraRoute
- RainProxy
- RoamProxy
- Shifter
- StrikeProxy
- Thordata
- ThunderProxy
- VantageProxies
- VibeProxies
- VitalExclusive
- Webshare
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 37.221.250.0/24 since Apr 2025 | AS204666 | Residential | 15 3 always on | ISP Alliance a.s. | |
| 37.221.251.0/24 since Apr 2025 | AS204666 | Residential | 9 2 always on | ISP Alliance 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 |
|---|---|---|---|---|---|---|
| 37.221.240.0/20 | 4,096 | CZ-GRAPESC-20120410 | ISP Alliance a.s. (ORG-GSA22-RIPE) · CZ | ALLOCATED PA | Apr 10, 2012 | abuse@ |
| └ 37.221.250.0/23 | 512 | TLAPNET-SNS | Tlapnet s.r.o. (ORG-TS210-RIPE) · CZ | ASSIGNED PA | Nov 5, 2012 | servis@ |
Network & registry
Announced by
Covering announcement 37.221.240.0/20
- Prefix
- 37.221.240.0/20
- Announced by
- AS204666 Jiri Tlapak
- Type
- Residential
- Proxy exits
- 208
- Always-on exits
- 36
- RPKI
- RPKI valid
- Netname
- CZ-GRAPESC-20120410
- Registrant
- ISP Alliance a.s.
- RIR
- RIPE NCC
Origin network
AS204666
CZ
- Name
- Jiri Tlapak
- Type
- Internet provider
- Registered
- Jan 29, 2018
- Domain
- tlapnet.cz
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 37.221.240.0/20
37.221.240.0/20
Routing history
- Pattern
- Rotating
- First seen
- May 2012
- Current origin since
- May 2025 · 1.5 yr
- Origin networks
- 4
- Last change of origin
- May 2025
Recorded history
History
- Handoffs
- 3
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 37.221.240.0/20 | AS198668 | /32 | RIPE | Another network |
| 37.221.240.0/20 | AS204666 | /24 | RIPE | RPKI valid |
Whois
Registration for this announcement
- Range
- 37.
221. 240. 0/ 20 - Netname
- CZ-GRAPESC-20120410
- Registrant
- ISP Alliance a.s.
- Registrant country
- CZ
- Organization
- ISP Alliance a.s. (ORG-GSA22-RIPE)
- Org country
- CZ
- Type
- ALLOCATED PA
- Created
- Apr 10, 2012
- Updated
- May 20, 2016
- Maintainer
- RIPE-NCC-HM-MNT
- RIR
- RIPE NCC
- Country
- CZ
- Delegated
- Apr 10, 2012
- Status
- assigned
Report abuse
Abuse contact
- abuse@
ispalliance. cz - Name
- ISPalliance Abuse
- Handle
- IA3261-RIPE