Data as of Nov 11, 2026
37.63.121.0/24
17 residential-proxy exits · 30 daysA1 Bulgaria EAD
Residential-proxy exits
Proxy exits
17
6.6% of its addresses · 30 days
Always-on exits
1
5.9% of its exits
Providers
52
selling exits here
Oct 12, 2026 – Nov 10, 2026
Exits seen per day
2.4K observations
Proxy providers listing exits
- 2Captcha
- 711Proxy
- 911Proxy
- 9Proxy
- ASHBURNPROXIES
- Ake.net
- BestProxy
- BirdProxies
- BottingTools
- ByteProxies
- Byteful
- CliProxy
- Decodo
- EnigmaProxy
- Evomi
- FastProxy
- FlashProxy
- FloppyData
- GSocks
- Geonix
- Geonode
- GonzoProxy
- Infatica
- InfiniteProxies
- Kookey
- LUMIPROXY
- LemonBright
- LemonPrime
- LightningProxies
- MangoProxy
- NSocks
- NiuProxy
- NodeProxy
- NovaProxy
- Oxylabs
- PROXYSCRAPE
- Proxiware
- Proxy-Seller
- ProxyEmpire
- ProxyRack
- ProxyWing
- Proxyma
- RainProxy
- Shifter
- Smartproxy
- StrikeProxy
- Thordata
- ThunderProxy
- VibeProxies
- VitalExclusive
- VitalProxy
- ZENPROXY_PREMIUM
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 37.63.0.0/17 since Dec 2019 | AS8717 | Residential | 8,877 76 always on | A1 Bulgaria EAD |
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 |
|---|---|---|---|---|---|---|
| 37.63.0.0/17 | 32,768 | BG-MTELNET-20120123 | A1 Bulgaria EAD (ORG-MN1-RIPE) · BG | ALLOCATED PA | Jan 23, 2012 | RIPE. |
| └ 37.63.120.0/21 | 2,048 | GPON-SofiaCenter-2 | GPON Services | ASSIGNED PA | Oct 17, 2012 | RIPE. via BG-MTELNET-20120123 |
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
Registry
Holder
- Organization
- A1 Bulgaria EAD
- Handle
- ORG-MN1-RIPE
- Range
- 37.
63. 0. 0/ 17 - Registration type
- ALLOCATED PA
- Record created
- Jan 23, 2012
Origin network
AS29580
BG
- Name
- A1 Bulgaria EAD
- Type
- Internet provider
- Registered
- Oct 15, 2003
- Domain
- a1.bg
- Industry
- Computer and Information Technology
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Oct 2022
- Current origin since
- Oct 2022 · 4.1 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 37.63.121.0/24 | AS29580 | /24 | RIPE | RPKI valid |
| 37.63.0.0/17 | AS8717 | /17 | RIPE | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS29580 | RIPE | A1BG_RSBG_SFN | SPNET-MNT HOMELAN-MNT | Jan 8, 2026 |
Whois
Registration for this announcement
- Range
- 37.
63. 120. 0/ 21 - Netname
- GPON-SofiaCenter-2
- Registrant
- GPON Services
- Registrant country
- BG
- Organization
- GPON Services
- Org country
- BG
- Type
- ASSIGNED PA
- Created
- Oct 17, 2012
- Updated
- Oct 17, 2012
- Maintainer
- SPNET-MNT
- RIR
- RIPE NCC
- Country
- BG
- Delegated
- Jan 23, 2012
- Status
- assigned
Report abuse
Abuse contact
- RIPE.
Abuse@ a1. bg - Name
- A1 Bulgaria EAD Abuse
- Handle
- AR14215-RIPE