151.251.168.0/21

Residential-proxy exits

Proxy exits

81

4.0% of its addresses · 30 days

Always-on exits

6

7.4% of its exits

Spread

7 of 8

/24s with at least one exit

Providers

72

selling exits here

Oct 5, 2026 – Nov 3, 2026

Exits seen per day

24K observations

/24s with the most always-on exits

/24	Always-on exits	Proxy exits
151.251.168.0/24	2	15
151.251.169.0/24	2	12
151.251.173.0/24	1	14
151.251.171.0/24	1	10
151.251.175.0/24	0	16
151.251.170.0/24	0	10
151.251.174.0/24	0	4

Proxy providers listing exits

2Captcha
711Proxy
Ake.net
AnyIP
B2Proxy
BartProxies
BestProxy
BirdProxies
BottingTools
BuyingProxy
ByteProxies
Byteful
CliProxy
DataImpulse
Datarama
Decodo
EZProxies
EnigmaProxy
Evomi
FastProxy
FlashProxy
FlexyProxies
FloppyData
GSocks
Geonix
Geonode
GloryCloud
GoProxies
GonzoProxy
IPFly
IPOasis
IPPeak
IPRoyal
Infatica
InfiniteProxies
KocerRoxy
Kookey
LemonBright
LemonLabs
LightningProxies
LudaxProxy
MangoProxy
NSocks
NiuProxy
NodeMaven
NodeProxy
NovaProxy
Novada
Oxylabs
Proxio
Proxiware
Proxy-Seller
Proxy4U
ProxyEmpire
ProxyGeo
ProxyRack
ProxyWing
Proxyma
PuraRoute
RainProxy
RoamProxy
RolaProxy
Shifter
Smartproxy
StrikeProxy
Thordata
ThunderProxy
VantageProxies
VibeProxies
VitalExclusive
VitalProxy
Webshare

Announcements

More specific

Announcements inside

Prefix	Origin	Type	Proxy exits	Holder
151.251.168.0/23 since Sep 2023	AS29580	Residential	27 4 always on	A1 Bulgaria EAD
151.251.170.0/24 since Oct 2023	AS29580	Residential	10	A1 Bulgaria EAD
151.251.171.0/24 since Oct 2023	AS29580	Residential	10 1 always on	A1 Bulgaria EAD
151.251.172.0/24 since May 2024	AS29580	Residential		A1 Bulgaria EAD
151.251.173.0/24 since Oct 2023	AS29580	Residential	14 1 always on	A1 Bulgaria EAD
151.251.174.0/23 since Oct 2023	AS29580	Residential	20	A1 Bulgaria EAD

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
151.251.0.0/16	65,536	BG-MTELNET-20120821	A1 Bulgaria EAD (ORG-MN1-RIPE) · BG	ALLOCATED PA	Aug 21, 2012	RIPE.Abuse@a1.bg
└ 151.251.168.0/21	2,048	A1-BFP168	A1 BUlgaria EAD	ASSIGNED PA	Oct 1, 2012	RIPE.Abuse@a1.bg via BG-MTELNET-20120821

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

Announcement Routing history RPKI & IRR Whois & abuse

Announced by

Covering announcement 151.251.0.0/16

Prefix: 151.251.0.0/16
Announced by: AS8717 A1 Bulgaria EAD
Type: Residential
Proxy exits: 5,646
Always-on exits: 114
RPKI: RPKI valid
Netname: BG-MTELNET-20120821
Registrant: A1 Bulgaria EAD
RIR: RIPE NCC

Origin network

AS8717

BG

Name: A1 Bulgaria EAD
Type: Internet provider
Registered: Mar 19, 1998
Domain: a1.bg
Website: www.a1.bg
Industry: Internet Service Provider (ISP)
Spamhaus ASN-DROP: not listed

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
151.251.0.0/16	AS8717	/16	RIPE	RPKI valid

IRR

Route objects on 151.251.0.0/16

Origin	Registry	Description	Maintainer	Modified
AS8717	RIPE	A1 BG Net	SPNET-MNT AS13124-MNT	Nov 28, 2022