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Data as of Nov 9, 2026

203.251.128.0/18

1 anonymizer address · <0.01% · VPN75 residential-proxy exits · 30 days

Korea Telecom

Announcement
this exact prefix
No RPKI
Announced by
AS4766
Type
Residential
92% of it

Residential-proxy exits

Proxy exits
75
0.46% of its addresses · 30 days
Always-on exits
4
5.3% of its exits
Spread
27 of 64
/24s with at least one exit
Providers
61
selling exits here
Oct 10, 2026 – Nov 8, 2026

Exits seen per day

11K observations
  • VPN · anonymizer
  • Residential

/24s with the most always-on exits

/24Always-on exitsProxy exits
203.251.170.0/2417
203.251.146.0/2415
203.251.132.0/2412
203.251.140.0/2412
203.251.133.0/2406
203.251.158.0/2406
203.251.167.0/2405
203.251.189.0/2404
203.251.180.0/2404
203.251.143.0/2404
203.251.156.0/2404
203.251.128.0/2403
203.251.182.0/2403
203.251.142.0/2402
203.251.185.0/2402
203.251.162.0/2402
203.251.169.0/2402
203.251.188.0/2402
203.251.144.0/2402
203.251.177.0/2401
203.251.172.0/2401
203.251.141.0/2401
203.251.184.0/2401
203.251.166.0/2401

Proxy providers listing exits

  • 2Captcha
  • 711Proxy
  • Ake.net
  • AnyIP
  • BirdProxies
  • BottingTools
  • ByteProxies
  • Byteful
  • CatProxies
  • CliProxy
  • Datarama
  • EnigmaProxy
  • Evomi
  • FLEETPROXY
  • FastProxy
  • FlashProxy
  • FlexyProxies
  • FloppyData
  • GSocks
  • Geonix
  • Geonode
  • GloryCloud
  • GoProxies
  • GonzoProxy
  • HideProxy
  • IPFly
  • IPOasis
  • IPRoyal
  • Infatica
  • InfiniteProxies
  • LemonBright
  • LemonLabs
  • LemonPrime
  • LightningProxies
  • MangoProxy
  • NextProxy
  • NodeMaven
  • NodeProxy
  • NovaProxy
  • Novada
  • PacketStream
  • ProxiesVision
  • Proxiware
  • Proxy-Seller
  • ProxyEmpire
  • ProxyGeo
  • ProxyHat
  • ProxyRack
  • Proxying
  • Proxyma
  • PuraRoute
  • RainProxy
  • SPYDERPROXY_PREMIUM
  • Shifter
  • Thordata
  • ThunderProxy
  • VantageProxies
  • VibeProxies
  • VitalExclusive
  • VitalProxy
  • ZENPROXY_PREMIUM
IPv4 market

Path

1 · Holder
Korea Telecom
2 · Leased from
not leased
3 · Announced by
AS4766 Korea Telecom
since May 2005 · 21.5 yr ago
4 · Use
VPN servicesnamed VPN Gate
Residential

Operators, sellers and brokers

VPN services

NameParentIn 203.251.128.0/18/24s
VPN GateUniversity of Tsukuba
1<0.01%
1

Lineage

How this block came to its use, oldest first. The whole IPv4 market →

203.251.128.0/18

From the registry to its use

  1. Jan 26, 2001
    Route object
    AS4766 Korea Telecom
    RADB route object for AS4766 Korea Telecom, maintainer MAINT-AS4766
  2. May 9, 2005– today
    Announced
    AS4766 Korea Telecom
    Internet provider
  3. today
    Registry record
    Korea Telecom
    ALLOCATED PORTABLE
    203.251.128.0/18
  4. today
    Used
    VPN Gate
    VPN

Announcements

Nesting

More-specifics by size

Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific

Announcements inside

PrefixOriginTypeHolderRPKI
203.251.135.0/24
since Dec 2008
AS4766ResidentialKorea Telecom
203.251.136.0/24
since Nov 2017
AS4766ResidentialKorea Telecom
203.251.137.0/24
since Nov 2017
AS4766ResidentialKorea Telecom
203.251.151.0/24
since Aug 2011
AS45399BusinessKorea Telecom
203.251.152.0/24
since Feb 2011
AS45399BusinessKorea Telecom
203.251.153.0/24
since Aug 2011
AS45399BusinessKorea Telecom
203.251.154.0/24
since Aug 2011
AS45399BusinessKorea Telecom
203.251.178.0/24
since Apr 2019
AS18308BusinessKorea Telecom

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

16,384 addresses
TypeAddressesShareRanges
Residential15,10392%8
Business1,2807.8%5
VPNanonymizer1<0.01%1

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS4766

KR
Name
Korea Telecom
Type
Internet provider
Registered
Apr 22, 1996
Domain
kt.com
Website
www.kt.com/eng/main.jsp
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed
VPN servers
1